{"title":"Menu-Filters-Filter Wheels \u0026 Accessories","description":"\u003ch3 data-start=\"198\" data-end=\"269\"\u003e\u003cspan style=\"color: rgb(65, 119, 11);\"\u003e\u003cstrong\u003eStreamline Your Astrophotography with Filter Wheels \u0026amp; Accessories\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"271\" data-end=\"630\"\u003eTake your imaging to the next level with precision-engineered Filter Wheels and Accessories from Telescopes Canada. Designed for astrophotographers who demand accuracy, efficiency, and flexibility, these systems make switching filters effortless — so you can focus on capturing breathtaking images of galaxies, nebulae, and planets without interruption.\u003c\/p\u003e\n\u003cp data-start=\"632\" data-end=\"944\"\u003eBuilt for smooth rotation and perfect filter alignment, our filter wheels ensure consistent optical performance and reliable operation, even in long exposure sessions. Pair them with adapters, cables, and power accessories to create a fully integrated imaging setup that’s efficient and professional-grade.\u003c\/p\u003e\n\u003cp data-start=\"632\" data-end=\"944\"\u003e\u003cstrong\u003eWhy Choose Filter Wheels \u0026amp; Accessories from Telescopes Canada?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1016\" data-end=\"1078\"\u003eEnables quick, automated filter changes for seamless imaging\u003c\/li\u003e\n\u003cli data-start=\"1081\" data-end=\"1139\"\u003eMaintains perfect alignment and focus across all filters\u003c\/li\u003e\n\u003cli data-start=\"1142\" data-end=\"1207\"\u003eCompatible with leading astrophotography cameras and telescopes\u003c\/li\u003e\n\u003cli data-start=\"1210\" data-end=\"1272\"\u003eDurable, lightweight design for smooth, reliable performance\u003c\/li\u003e\n\u003cli data-start=\"1275\" data-end=\"1327\"\u003eIdeal for narrowband, RGB, and LRGB imaging setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1329\" data-end=\"1424\"\u003eOptimize your imaging workflow and capture the universe with unmatched precision and clarity.\u003c\/p\u003e\n\u003cp data-start=\"1426\" data-end=\"1617\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eShop Filter Wheels \u0026amp; Accessories at \u003cstrong\u003e\u003ca data-start=\"1462\" data-end=\"1510\" class=\"decorated-link\" rel=\"noopener\" href=\"https:\/\/telescopescanada.ca\"\u003eTelescopes Canada\u003c\/a\u003e\u003c\/strong\u003e and experience professional-level convenience, control, and performance in every astrophotography session.\u003c\/p\u003e","products":[{"product_id":"qhycfw3-s-sr-qhy-3rd-generation-small-standard-thickness-filter-wheel-7-position-1-25","title":"QHYCCD QHYCFW3-S-SR 3rd Generation Small Standard Thickness Filter Wheel - 7 x 1.25\"","description":"\u003cp\u003eThis new thin stepper motor drive and fully automatic filter switching revolutionizes overall performance!  This version is 20.5mm thick.\u003c\/p\u003e\n\u003cp\u003eQHYCCD selected a high quality ultra-thin hybrid stepper motor for the 3rd generation filter wheel design.  Compared to the PM stepper motor used in many filter wheels, the hybrid stepper motor has higher precision, smaller step angle, and is more expensive.  The motor is enclosed to prevent dust from entering the motor, thus improving reliability and motor life.  The direction of filter rotation can be reversed: The filter carousel can be rotated clockwise or counterclockwise to complete the rotation quickly which is very convenient. The overall design is thinner.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFriction drive with zero backlash\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRegarding the evolution of the motor drive, our 2nd generation filter wheels used a gear drive while this 3rd generation filter wheel uses a friction drive that results in zero backlash during operation. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB serial port switch.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe serial port switch can accommodate fast switching between serial communication mode and USB communication mode.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse the USB port to power the filter wheel.\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter wheel supports the QHY 4-pin connection control mode.  The firmware is open source and compatible with Arduino.  The design is compatible with the QHY-OAG (off-axis guide) for the corresponding size. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeautiful in appearance and ingenious.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe QHYCFW3 main body is cut from a single piece of aluminum by a precision CNC machine.  The craftsmanship and finish are exquisite.  When you hold the small design, you do not want to put it down!\u003c\/p\u003e\n\u003cp\u003eA specially designed filter carousel allows the installation of unmounted filters of different thicknesses. Mounted Filters below 10 mm thick can be installed and unmounted filters of different thicknesses can also be mounted on the same filter disc. Filter positioning is more precise and faster.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEnsure you are using an externally powered USB hub for this filter wheel in order to provide sufficient power.\u003c\/span\u003e\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":28264357920848,"sku":"QHYCFW3-S-SR","price":373.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/qhyccd-filter-wheel-qhyccd-qhycfw3-s-sr-3rd-generation-small-standard-thickness-filter-wheel-7-x-1-25-11074612854864.jpg?v=1668528162"},{"product_id":"qhycfw3-m-us-qhy-3rd-generation-small-standard-thickness-filter-wheel-7-position-x-36mm","title":"QHYCCD QHYCFW3M-US 3rd Generation Medium Thin Version Filter Wheel - 5 x 2\" (or 50mm Unmounted) and 7 x 36mm Filter Versions","description":"\u003cp\u003eThis new ultra-thin stepper motor drive and fully automatic filter switching revolutionizes overall performance!  This Filter wheel is 17.5mm.\u003c\/p\u003e\n\u003cp\u003eQHYCCD selected a high quality ultra-thin hybrid stepper motor for the 3rd generation filter wheel design.  Compared to the PM stepper motor used in many filter wheels, the hybrid stepper motor has higher precision, smaller step angle, and is more expensive.  The motor is enclosed to prevent dust from entering the motor, thus improving reliability and motor life.  The direction of filter rotation can be reversed: The filter carousel can be rotated clockwise or counterclockwise to complete the rotation quickly which is very convenient. The overall design is thinner. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFriction drive with zero backlash\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRegarding the evolution of the motor drive, our 2nd generation filter wheels used a gear drive while this 3rd generation filter wheel uses a friction drive that results in zero backlash during operation. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB serial port switch.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe serial port switch can accommodate fast switching between serial communication mode and USB communication mode.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse the USB port to power the filter wheel.\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter wheel supports the QHY 4-pin connection control mode.  The firmware is open source and compatible with Arduino.  The design is compatible with the QHY-OAG (off-axis guide) for the corresponding size. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeautiful in appearance and ingenious.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe QHYCFW3 main body is cut from a single piece of aluminum by a precision CNC machine.  The craftsmanship and finish are exquisite.  When you hold the small design, you do not want to put it down!\u003c\/p\u003e\n\u003cp\u003eA specially designed filter carousel allows the installation of unmounted filters of different thicknesses. Mounted Filters below 10 mm thick can be installed and unmounted filters of different thicknesses can also be mounted on the same filter disc. Filter positioning is more precise and faster.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEnsure you are using an externally powered USB hub for this filter wheel in order to provide sufficient power.\u003c\/span\u003e\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"5 x 2\"","offer_id":39488882442422,"sku":"QHYCFW3M-US-5","price":431.0,"currency_code":"CAD","in_stock":true},{"title":"7 x 36mm","offer_id":39488882475190,"sku":"QHYCFW3M-US-7","price":431.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/qhyccd-filter-wheel-qhyccd-qhycfw3m-us-3rd-generation-medium-thin-version-filter-wheel-5-x-2-or-50mm-unmounted-and-7-x-36mm-filter-versions-11074634416208.jpg?v=1668527995"},{"product_id":"qhycfw3-m-sr-qhy-3rd-generation-medium-standard-thickness-filter-wheel-5-positions-x-2","title":"QHYCCD CFW3M-SR 3rd Generation Medium Standard Thickness Filter Wheel - 5 x 2\" (or 50mm Unmounted) and 7 x 36mm Filter Versions - QHYCFW3M-SR","description":"\u003cp\u003eThis new ultra-thin stepper motor drive and fully automatic filter switching revolutionizes overall performance!  This filter wheel is 21.5mm thick.\u003c\/p\u003e\n\u003cp\u003eQHYCCD selected a high quality ultra-thin hybrid stepper motor for the 3rd generation filter wheel design.  Compared to the PM stepper motor used in many filter wheels, the hybrid stepper motor has higher precision, smaller step angle, and is more expensive.  The motor is enclosed to prevent dust from entering the motor, thus improving reliability and motor life.  The direction of filter rotation can be reversed: The filter carousel can be rotated clockwise or counterclockwise to complete the rotation quickly which is very convenient.The overall design is thinner. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFriction drive with zero backlash\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRegarding the evolution of the motor drive, our 2nd generation filter wheels used a gear drive while this 3rd generation filter wheel uses a friction drive that results in zero backlash during operation. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB serial port switch.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe serial port switch can accommodate fast switching between serial communication mode and USB communication mode.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse the USB port to power the filter wheel.\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter wheel supports the QHY 4-pin connection control mode.  The firmware is open source and compatible with Arduino.  The design is compatible with the QHY-OAG (off-axis guide) for the corresponding size. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeautiful in appearance and ingenious.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe QHYCFW3 main body is cut from a single piece of aluminum by a precision CNC machine.  The craftsmanship and finish are exquisite.  When you hold the small design, you do not want to put it down!\u003c\/p\u003e\n\u003cp\u003eA specially designed filter carousel allows the installation of unmounted filters of different thicknesses. Mounted Filters below 10 mm thick can be installed and unmounted filters of different thicknesses can also be mounted on the same filter disc. Filter positioning is more precise and faster.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEnsure you are using an externally powered USB hub for this filter wheel in order to provide sufficient power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eAvailable in 2 Versions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5 position, 2\" mounted or 50mm unmounted filter version\u003c\/li\u003e\n\u003cli\u003e7 position, 36mm unmounted filter version\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"5 x 2\"","offer_id":45916413296859,"sku":"QHYCFW3M-SR-5","price":471.0,"currency_code":"CAD","in_stock":true},{"title":"7 x 36mm","offer_id":45916413329627,"sku":"QHYCFW3M-SR-7","price":471.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/qhyccd-filter-wheel-qhyccd-cfw3m-sr-3rd-generation-medium-standard-thickness-filter-wheel-5-x-2-or-50mm-unmounted-11074686779472.jpg?v=1668536438"},{"product_id":"qhycfw3-l-qhy-3rd-generation-large-filter-wheel-7-position-x-2-or-50mm","title":"QHYCCD QHYCFW3L 3rd Generation Large Filter Wheel - 7 x 2\" and 50mm Unmounted","description":"\u003cp\u003eThis new ultra-thin stepper motor drive and fully automatic filter switching revolutionizes overall performance!\u003c\/p\u003e\n\u003cp\u003eQHYCCD selected a high quality ultra-thin hybrid stepper motor for the 3rd generation filter wheel design.  Compared to the PM stepper motor used in many filter wheels, the hybrid stepper motor has higher precision, smaller step angle, and is more expensive.  The motor is enclosed to prevent dust from entering the motor, thus improving reliability and motor life.  The direction of filter rotation can be reversed: The filter carousel can be rotated clockwise or counterclockwise to complete the rotation quickly which is very convenient.  The overall design is thinner. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFriction drive with zero backlash\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRegarding the evolution of the motor drive, our 2nd generation filter wheels used a gear drive while this 3rd generation filter wheel uses a friction drive that results in zero backlash during operation. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB serial port switch.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe serial port switch can accommodate fast switching between serial communication mode and USB communication mode.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse the USB port to power the filter wheel.\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter wheel supports the QHY 4-pin connection control mode.  The firmware is open source and compatible with Arduino.  The design is compatible with the QHY-OAG (off-axis guide) for the corresponding size. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeautiful in appearance and ingenious.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe QHYCFW3 main body is cut from a single piece of aluminum by a precision CNC machine.  The craftsmanship and finish are exquisite.  When you hold the small design, you do not want to put it down!\u003c\/p\u003e\n\u003cp\u003eA specially designed filter carousel allows the installation of unmounted filters of different thicknesses. Mounted Filters below 10 mm thick can be installed and unmounted filters of different thicknesses can also be mounted on the same filter disc. Filter positioning is more precise and faster.\u003c\/p\u003e\n\u003cp\u003eEnsure you are using an externally powered USB hub for this filter wheel in order to provide sufficient power.\u003c\/p\u003e\n\u003ch4\u003eMechanical specification\u003c\/h4\u003e\n\u003cp\u003eQHYCFW2-M has both M54\/0.75, 3.5mm thickness thread on telescope side M54\/0.75 2.5mm thickness thread on camera side. On camera side it has a 2mm stage which is used for preventing light leaking when connect with camera. It has six M3 screw holes on telescope side which can be used to connect QHYOAG and six 3mm through holes on camera side which can be used to connect InterCam series camera.\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":28264410349648,"sku":"QHYCFW3L","price":618.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/qhyccd-filter-wheel-qhyccd-qhycfw3l-3rd-generation-large-filter-wheel-7-x-2-or-50mm-unmounted-11074729869392.jpg?v=1668528156"},{"product_id":"qhycfw3-xl-qhy-3rd-generation-extra-large-filter-wheel-9-position-x-2-9-position-x-50mm-round-7-position-x-50mm-square","title":"QHYCCD QHYCFW3XL Color Filter Wheel - 9 x 2\" (50mm) and Round \u0026 7 x 50mm Square Filter Versions","description":"\u003cp\u003e\u003cspan style=\"color: rgb(212, 0, 0);\"\u003e\u003cstrong\u003eNOTE: This filter wheel comes with exchangeable carousels. You receive both the 9x2 and the 7x50 carousel.  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis new ultra-thin stepper motor drive and fully automatic filter switching revolutionizes overall performance!\u003c\/p\u003e\n\u003cp\u003eQHYCCD selected a high quality ultra-thin hybrid stepper motor for the 3rd generation filter wheel design.  Compared to the PM stepper motor used in many filter wheels, the hybrid stepper motor has higher precision, smaller step angle, and is more expensive.  The motor is enclosed to prevent dust from entering the motor, thus improving reliability and motor life.  The direction of filter rotation can be reversed: The filter carousel can be rotated clockwise or counterclockwise to complete the rotation quickly which is very convenient. The overall design is thinner. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFriction drive with zero backlash\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRegarding the evolution of the motor drive, our 2nd generation filter wheels used a gear drive while this 3rd generation filter wheel uses a friction drive that results in zero backlash during operation. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSB serial port switch.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe serial port switch can accommodate fast switching between serial communication mode and USB communication mode.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse the USB port to power the filter wheel.\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter wheel supports the QHY 4-pin connection control mode.  The firmware is open source and compatible with Arduino.  The design is compatible with the QHY-OAG (off-axis guide) for the corresponding size. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeautiful in appearance and ingenious.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe QHYCFW3 main body is cut from a single piece of aluminum by a precision CNC machine.  The craftsmanship and finish are exquisite.  When you hold the small design, you do not want to put it down!\u003c\/p\u003e\n\u003cp\u003eA specially designed filter carousel allows the installation of unmounted filters of different thicknesses. Mounted Filters below 10 mm thick can be installed and unmounted filters of different thicknesses can also be mounted on the same filter disc. Filter positioning is more precise and faster.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEnsure you are using an externally powered USB hub for this filter wheel in order to provide sufficient power.\u003c\/span\u003e\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":46389475606747,"sku":"QHYCFW3 XL-9X2INCH","price":1151.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/qhyccd-filter-wheel-qhyccd-qhycfw3xl-color-filter-wheel-9-x-2-50mm-and-round-7-x-50mm-square-filter-versions-11074802253904.jpg?v=1668527991"},{"product_id":"optolong-l-enhance-dual-bandpass-filter-h-alpha-o2-2-inch","title":"Optolong L-eNhance Dual Narrowband Filter (H-Alpha and H-Beta\/O-III)","description":"\u003cp\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and frequently include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/p\u003e\n\u003cp\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual band-pass narrowband filter which has been designed for DSLR (digital DSLR), color CMOS and CCD Astrophotography Cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. This filter is excellent for imaging object which emit H-alpha and O-III\/H-beta light with near-complete rejection of all other light.  For more broadband targets such as galaxies and reflection nebulae, the Optolong L-Pro is the best-suited Optolong filter.\u003cbr\u003e\u003cbr\u003eOptolong believes the design of the L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha (10nm band width), H-Beta, and Oxygen III (24nm band width) nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.  This filter is excellent for emission targets such as nebulae which emit in H-Alpha and Beta, and O-III.  For more broadband targets such as galaxies or reflection nebulae, the \u003ca href=\"https:\/\/telescopescanada.ca\/products\/optolong-l-pro-light-pollution-filter?_pos=1\u0026amp;_sid=92b15e7ad\u0026amp;_ss=r\u0026amp;variant=28434278711376\"\u003eL-Pro\u003c\/a\u003e is excellent.  For maximum light pollution rejection with 7nm bands at H-Alpha and O-III, try the \u003ca href=\"https:\/\/telescopescanada.ca\/collections\/optolong\/products\/copy-of-optolong-l-enhance-dual-narrowband-filter-h-alpha-and-h-beta-o-iii?_pos=1\u0026amp;_sid=af2b2b39a\u0026amp;_ss=r\u0026amp;variant=32334135001168\"\u003eL-Extreme filter\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #2b00ff;\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: The Optolong L-eNhance filters (apart from the threaded both sides version) have threads on one side to keep them very thin - 1.85mm not including the threads - they can be used with \u003ca style=\"color: #2b00ff;\" href=\"https:\/\/telescopescanada.ca\/collections\/filter-wheels\"\u003eFilter Wheels\u003c\/a\u003e, \u003ca style=\"color: #2b00ff;\" href=\"https:\/\/telescopescanada.ca\/products\/2-telescope-filter-drawer-system-with-2-drawers?variant=29091833315408\"\u003eFilter Drawer System\u003c\/a\u003e, focusers with a place to thread focal reducers internally (such as some Moonlite focusers) and camera nose pieces that fit into compression rings, but the 1.85mm filter should not be threaded into the imaging train like an adapter ring with threads on both sides.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #2b00ff;\"\u003eThe threaded both sides version however can be used like an adapter ring and can be threaded directly into your optical train without any additional equipment required. The threaded both sides version has a thickness of 7.6mm not including the threads.  \u003cstrong\u003eNote that this size filter will NOT fit in most filter wheels or drawers.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/L-eNhance_Filter_curve_480x480.png?v=1588173898\"\u003e\u003c\/p\u003e\n\u003ch4\u003eCanon EOS-C Supported Models:\u003c\/h4\u003e\n\u003cp\u003e7D2\/80D\/800D\/77D\/70D\/760D\/750D\/700D 650D\/600D\/550D\/500D\/400D\/100D\/1100D 1200D\/1300D\u003c\/p\u003e\n\u003cp\u003eThe filters work with all EF lenses, but is not suitable for Canon EF-S lenses.\u003c\/p\u003e\n\u003cp\u003eMore details from Optolong can be found \u003ca href=\"https:\/\/www.optolongastronomy.com\/cms\/document\/detail\/id\/112.html\"\u003eHere\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate:\u003c\/td\u003e\n\u003ctd\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness:\u003c\/td\u003e\n\u003ctd\u003e1.85mm \/ 10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTpeak:\u003c\/td\u003e\n\u003ctd\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking range:\u003c\/td\u003e\n\u003ctd\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface quality:\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eλ\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eParallelism (arc sec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate:\u003c\/td\u003e\n\u003ctd\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness:\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTpeak:\u003c\/td\u003e\n\u003ctd\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking range:\u003c\/td\u003e\n\u003ctd\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface quality:\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eλ\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eParallelism (arc sec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":28314437779536,"sku":"Optolong L-eNhance-1.25INCH","price":254.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":28314423853136,"sku":"Optolong L-eNhance-2INCH","price":325.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" THREADED BOTH SIDES (7.7mm CASING)","offer_id":31647187304528,"sku":"Optolong L-eNhance-1.25INCH6mm Dual Threaded","price":254.0,"currency_code":"CAD","in_stock":true},{"title":"2\" THREADED BOTH SIDES (7.7mm CASING)","offer_id":29034783146064,"sku":"Optolong L-eNhance-2INCH6mm Dual Threaded","price":325.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C - Please See Description for Supported Models","offer_id":32289129234512,"sku":"Optolong L-eNhance-EOS-C","price":368.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-2-optolong-l-enhance-dual-narrowband-filter-h-alpha-and-h-beta-o-iii-11565594116176.jpg?v=1668534817"},{"product_id":"optolong-l-pro-light-pollution-filter","title":"Optolong L-Pro Light Pollution Filter","description":"\u003cp\u003eOptolong L-Pro (L-Professional) is a multi-band-pass filter which selectively suppresses the transmission of light pollution lines. For example, mercury vapor lamps, high and low pressure sodium vapor lights and sky glow caused by emission from neutral oxygen in our atmosphere.  The L-Pro works well for galaxies, reflection and emission nebulae and all other emission or reflection targets in combination with strong light pollution rejection.  This filter is Optolong's strongest light pollution filter that isn't a narrowband filter (such as the \u003ca href=\"https:\/\/telescopescanada.ca\/products\/optolong-l-enhance-dual-band-pass-filter-h-alpha-o2-2-inch?_pos=2\u0026amp;_sid=92b15e7ad\u0026amp;_ss=r\u0026amp;variant=28314423853136\"\u003eL-eNhance\u003c\/a\u003e or \u003ca href=\"https:\/\/telescopescanada.ca\/collections\/optolong\/products\/copy-of-optolong-l-enhance-dual-narrowband-filter-h-alpha-and-h-beta-o-iii?_pos=1\u0026amp;_sid=af2b2b39a\u0026amp;_ss=r\u0026amp;variant=32334135001168\"\u003eL-eXtreme\u003c\/a\u003e).\u003cbr\u003e\u003cbr\u003eL-Pro enhances the transmission of major emissions from nebula while offering great color balance with its wide yet effective light pollution cutting transmission band. The balanced transmission allows objects with wide emission spectrum such as galaxies to be imaged with minimal color cast (easier to correct in post-processing). Among the emission lines enhanced are OIII (496, 500nm), H-beta (486nm), NII (654, 658nm), H-alpha (656nm) and SII (672nm).  Available in 2\", 1.25\" and selected DSLR camera sizes.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #2b00ff;\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: The Optolong L-Pro filters (apart from the threaded both sides version) have threads on one side to keep them very thin - 1.85mm not including the threads - they can be used with \u003ca style=\"color: #2b00ff;\" href=\"https:\/\/telescopescanada.ca\/collections\/filter-wheels\"\u003eFilter Wheels\u003c\/a\u003e, \u003ca style=\"color: #2b00ff;\" href=\"https:\/\/telescopescanada.ca\/products\/2-telescope-filter-drawer-system-with-2-drawers?variant=29091833315408\"\u003eFilter Drawer System\u003c\/a\u003e, focusers with a place to thread focal reducers internally (such as some Moonlite focusers) and camera nose pieces that fit into compression rings, but the 1.85mm filter should not be threaded into the imaging train like an adapter ring with threads on both sides. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #2b00ff;\"\u003eThe threaded both sides version however can be used like an adapter ring and can be threaded directly into your optical train without any additional equipment required. The threaded both sides version has a thickness of 7.6mm not including the threads.  \u003cstrong\u003eNote that this size filter will NOT fit in most filter wheels or drawers.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cp\u003e90% transmission at major nebula emission lines\u003cbr\u003eMulti-layers anti-reflection coating\u003cbr\u003ePrecise and sharp roll-off at light pollutant lines\u003cbr\u003e2 mm filter thickness (1.25\", 2\") | 1mm (clip series)\u003cbr\u003eMade on Schott substrate\u003cbr\u003eFinely polished to 1\/4 wave accuracy\u003cbr\u003eSurface quality: 60\/40 (MIL-O-13830 standard)\u003c\/p\u003e\n\u003ch4\u003eBest Uses\u003c\/h4\u003e\n\u003cp\u003eMonochrome \u0026amp; one-shot-color CCD\/CMOS camera\u003cbr\u003eDeep sky color imaging, particularly reflective nebula and galaxies\u003c\/p\u003e\n\u003cp\u003eCanon EOS FF Available for: EOS 5D\/5DmarkII\/III and 6D only\u003cbr\u003e\u003cbr\u003eNikon FF Available for: D600\/D610\/D700\/D750\/D800\/D800E\/D810\/D810A\/DF\u003cbr\u003e\u003cbr\u003eSony FF Available for: A7M\/A7M2\/A7M3\/A7R\/A7R2\/A7R3\/A7S\/A7S2\/A9.  Works with the Mark I series Sony cameras (a7, a7r, a7s).  \u003cstrong\u003eMay not fit into newer generation Sony cameras.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cp\u003eTpeak: T\u0026gt;90%\u003cbr\u003eSpectrum: 380-750nm\u003cbr\u003eOptical Density:  Light pollution emission is blocked 90%\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism (arc sec): 30s\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":28434278776912,"sku":"OPTOLONG-LPRO-1.25INCH","price":212.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":28434278711376,"sku":"OPTOLONG-LPRO-2INCH","price":283.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" THREADED BOTH SIDES (7.7mm CASING)","offer_id":31647208833104,"sku":"Optolong L-PRO 1.25 INCH 2-SIDED THREADS (10mm)","price":212.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-C","offer_id":28434411716688,"sku":"OPTOLONG-LPRO-EOS-C","price":354.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-FF","offer_id":29175211393104,"sku":"OPTOLONG-CANON-EOS-FF","price":382.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS R","offer_id":40545762050230,"sku":"OPTOLONG-CANON-EOS-R","price":354.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon FF","offer_id":30271181357136,"sku":"Optolong L-Pro Nikon-FF","price":382.0,"currency_code":"CAD","in_stock":true},{"title":"Sony FF","offer_id":30271173361744,"sku":"Optolong L-Pro Sony-FF","price":382.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon Z","offer_id":46512478060763,"sku":"Optolong L-Pro Nikon-Z","price":354.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-2-optolong-l-pro-light-pollution-filter-11187337592912.jpg?v=1750624192"},{"product_id":"optolong-uhc-ultra-high-contrast-light-pollution-filter","title":"Optolong UHC Ultra-High Contrast Light Pollution Filter","description":"\u003cp\u003e\u003cspan\u003eThe UHC (Ultra-High Contrast) broadband filter is designed to improve the visibility of various deep-sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting such as mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (sky glow).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter is highly transparent in the main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm). The filter is suitable for enhancing the contrast and details for both visual and photographic purpose in\u003c\/span\u003e\u003cspan\u003e suburban and rural areas with heavy light pollution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for color CCD cameras and unmodified DSLRs that accept 1.25\" filters.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e With narrower band-pass transmission gaps, this filter provides higher contrast than CLS filters.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e The UHC filter has a substantial red band-pass and offers superb views of objects like the Orion Nebula (M42)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Light pollution filters do not eliminate the effects of light pollution or increase the object's brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eCanon EOS FF Available for: EOS 5D\/5DmarkII\/III and 6D only\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eNikon FF Available for: D600\/D610\/D700\/D750\/D800\/D800E\/D810\/D810A\/DF\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eSony FF Available for: A7M\/A7M2\/A7M3\/A7R\/A7R2\/A7R3\/A7S\/A7S2\/A9\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSchott substrate material\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Thickness 2.0 mm (1.25\"\/2\"\/36mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Thickness 1.0 mm (Clip series)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Surface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Fine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e 95% transmission of main nebula emission lines (i.e. H-alpha 656nm, OIII 496nm and 500nm, SII 672nm and H-beta 486nm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e 0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm). Transmission of 0.1% is equivalent to OD3 (Optical Density), and a high optical density value indicates very low transmission, and low optical density indicates high transmission.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Parameter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMulti-layers anti-reflection coating\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation from temperature change\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFilter Cell\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUltra-thin filter cell minimizes vignetting by maximizing the clear aperture (clear aperture is 26mm for 1.25\")\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Airplane Grade Material | Precise CNC Machining | Sand Blasting Process | Black Anodized Finish | Extinction Treatment to Prevent Reflection | Laser Engraving No Fading\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePlastic PP Case | Imported High Pressure EVA Case Lining | Silver Cardboard Box | High Density Sponge Carton Lining\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eStandard 1.25\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThe Major Emission Lines of Nebulae\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eH-β486.1nm OIII 495.9nm OIII 500.7nm H-α656.3nm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHg 435.8nm 546.1nm 577nm 578.1nm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNa 598nm 589.6nm 615.4nm 616.1nm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":28463274066000,"sku":"OPTOLONG-UHC-1.25","price":78.0,"currency_code":"CAD","in_stock":false},{"title":"2\"","offer_id":29003532730448,"sku":"OPTOLONG-UHC-2","price":121.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-C","offer_id":30271546654800,"sku":"Optolong-UHC Canon-EOS-C","price":69.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-FF","offer_id":30271526731856,"sku":"Optolong-UHC Canon-FF","price":163.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon-FF","offer_id":30271219695696,"sku":"OPTOLONG-UHC Nikon-FF","price":163.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-1-25-optolong-uhc-ultra-high-contrast-light-pollution-filter-11187396345936.jpg?v=1668533740"},{"product_id":"zwo-8-position-1-25-31mm-electronic-filter-wheel","title":"ZWO 8 position 1.25\"\/31mm  Electronic Filter Wheel - ZWO-EFW-8x1.25","description":"\u003cdiv data-mce-fragment=\"1\" class=\"row clearfix\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"box one first\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"tabs_wrap tab-style-three\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"panes\"\u003e\n\u003cdiv data-mce-fragment=\"1\" id=\"tab-description\" class=\"pane entry-content\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/056_de4267a8-1509-4cba-b28e-005ef84b8844.jpg?v=1765070644\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"800\" width=\"800\" alt=\"05\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/056_de4267a8-1509-4cba-b28e-005ef84b8844.jpg?v=1765070644\" class=\"aligncenter wp-image-30954 size-full\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/0410_d6525850-b6a9-4705-91c8-47c370cbf67f.jpg?v=1765070648\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"800\" width=\"800\" alt=\"04\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/0410_d6525850-b6a9-4705-91c8-47c370cbf67f.jpg?v=1765070648\" class=\"aligncenter size-full wp-image-30959\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003eThe body is CNC milled from an aircraft graded aluminum block.\u003cbr data-mce-fragment=\"1\"\u003eWe decided to make it thinner, where it measures only 20 mm on the wheel body.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/0312_fa3d2534-ae30-47d3-8f4c-f294b3e428b3.jpg?v=1765070651\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"800\" width=\"800\" alt=\"03\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/0312_fa3d2534-ae30-47d3-8f4c-f294b3e428b3.jpg?v=1765070651\" class=\"aligncenter size-full wp-image-30955\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003eThe heart of our EFW comes from NPM, Japan, whose the manufacturer for the stepper motor and the quality is trustful and reliable. Guaranteed long life.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/065_69d40931-42a7-4a5f-9ac8-c6df24321e69.jpg?v=1765070655\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"800\" width=\"800\" alt=\"06\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/065_69d40931-42a7-4a5f-9ac8-c6df24321e69.jpg?v=1765070655\" class=\"aligncenter size-full wp-image-30956\"\u003e\u003c\/a\u003eThe Electronic Filter wheel can be rotated in both counter clockwise or clockwise direction for filter selection.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/073_75aafec4-f96a-493e-9df1-b09dd9fff827.jpg?v=1765070659\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"800\" width=\"800\" alt=\"07\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/073_75aafec4-f96a-493e-9df1-b09dd9fff827.jpg?v=1765070659\" class=\"aligncenter size-full wp-image-30957\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003eThere are no need for multiple cables to power this wheel up, just one USB cable does the trick. \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003eThe power consumption of this EFW is approximately 120mAh @ 5V, which can be operated from the Cooled CCD's USB hub.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe distance between the filter and sensor is around 10mm when you connect it to ASI1600.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSo 1.25″ filters won't have vignetting up to F5 focal ratio scope and 31mm filter won't have vignetting up to F2 lens.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOur new RGBL filters are recommended to work with ASI1600, it will offer nearly 1:1:1 RGB color balance.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWhat's in the box?\u003c\/h3\u003e\n\u003col data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8*31mm EFW body\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1.25″ cover\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eT2 nosepiece\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1.25″ holder(with cover and 2 screws)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eT2-T2 adapter(male)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003eA bag of filter masks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUSB2.0 2m cable\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003ePhillips screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"SV\"\u003eA bag of M2 screws\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E9_85_8D_E4_BB_B6-_E8_8B_B1_E6_96_87_6aade095-4bda-46b6-9909-2f8965d0e412.jpg?v=1765070662\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"540\" width=\"1000\" alt=\"配件-英文\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E9_85_8D_E4_BB_B6-_E8_8B_B1_E6_96_87_6aade095-4bda-46b6-9909-2f8965d0e412.jpg?v=1765070662\" class=\"aligncenter size-full wp-image-30958\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eHow to install the filter?\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e1.25″ filters required to be: threaded  shorter than 3mm in length,  without threads less than 7mm in height\u003c\/p\u003e\n\u003col data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eTake the back cover off\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLay the wheel down flat\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eScrew-in the filters up\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePut the back cover on\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTake the EFW mini for an example:\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Wheel-Filter.jpg?v=1765070665\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"295\" width=\"590\" alt=\"Wheel-Filter\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Wheel-Filter-1024x512.jpg?v=1765070631\" class=\"alignnone wp-image-5511\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e31mm and 36mm filter requires: a set of M2 screws and washers needed to fix the filters are included in the package .\u003c\/p\u003e\n\u003col data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eTake the back cover off. Lay the wheel down flat\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\" lang=\"EN-US\"\u003eHold the filter by the very edges and\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\" lang=\"EN-US\"\u003elay them in to the recess for each position\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" lang=\"EN-US\"\u003eAttach the washers, put in the screws\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePut the back cover on\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTake the EFW mini for an example:\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Wheel-31mmFilter.jpg?v=1765070669\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"298\" width=\"596\" alt=\"Wheel-31mmFilter\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Wheel-31mmFilter-1024x512.jpg?v=1765070634\" class=\"alignnone wp-image-5514\"\u003e\u003c\/a\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eHow to connect with the camera and telescope?\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Connect-camera-with-EFW.png?v=1765070674\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"1024\" width=\"637\" alt=\"Connect-camera-with-EFW\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Connect-camera-with-EFW-637x1024.png?v=1765070638\" class=\"alignnone size-large wp-image-5512\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eHow to use it?\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eyou just need to plugin the EFW with USB2.0 cable and install the   ASCOM driver\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThere are  ZWO Filter Wheel(1) and ZWO Filter Wheel(2) to select,  you can use either one of them\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThere are 2 ASCOM is for controlling 2 EFW in one software.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eMechanical drawing\u003c\/h3\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e \u003ca data-mce-fragment=\"1\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E4_BC_81_E4_B8_9A_E5_BE_AE_E4_BF_A1_E6_88_AA_E5_9B_BE_16184655475039_17877135-07eb-4c12-8576-0c177688a40a.png?v=1765070676\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"727\" width=\"651\" alt=\"企业微信截图_16184655475039\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E4_BC_81_E4_B8_9A_E5_BE_AE_E4_BF_A1_E6_88_AA_E5_9B_BE_16184655475039_17877135-07eb-4c12-8576-0c177688a40a.png?v=1765070676\" class=\"aligncenter size-full wp-image-31014\"\u003e\u003c\/a\u003e\n\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"space margin-b40\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"upsells products margin-b40\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"title_line margin-b20\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":28874473898064,"sku":"ZWO EFW-8x1.25","price":379.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-wheel-zwo-8-position-1-25-31mm-electronic-filter-wheel-zwo-efw-8x1-25-14801616830544.jpg?v=1736013998"},{"product_id":"zwo-5-position-1-25-31mm-electronic-filter-wheel","title":"ZWO 5 Position 1.25\" or 31mm  Mini Electronic Filter Wheel - ZWO-EFW-MINI","description":"\u003cp data-mce-fragment=\"1\"\u003eThe smallest and most lightweight 1.25″ Electronic Filter Wheel in the world!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e300g  ONLY ! Small than your hand !\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW-in-Hand_254dc113-c272-433c-a036-2f4adba5250d.jpg?v=1765070417\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-3716\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW-in-Hand_254dc113-c272-433c-a036-2f4adba5250d.jpg?v=1765070417\" alt=\"EFW in Hand\" width=\"800\" height=\"800\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe body is CNC machined from a full block of aircraft grade aluminum.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eVery thin design, \u003cspan data-mce-fragment=\"1\"\u003e20mm \u003c\/span\u003eONLY\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW-in-Hand-side-view_1724de76-99da-4622-839e-e5ba1d087870.jpg?v=1765070420\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-3717\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW-in-Hand-side-view_1724de76-99da-4622-839e-e5ba1d087870.jpg?v=1765070420\" alt=\"EFW in Hand side view\" width=\"800\" height=\"800\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe step motor is the heart of the EFW-Mini, which is made by NPM from Japan. You can trust its quality and reliability.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/P1010741_9e8ecc95-b77b-4da1-86c8-542d16c4516d.jpg?v=1765070423\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-3710\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/P1010741_9e8ecc95-b77b-4da1-86c8-542d16c4516d.jpg?v=1765070423\" alt=\"P1010741\" width=\"610\" height=\"610\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSupports both 5*1.25″ filters or 5*31mm filters\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Electronic Filter wheel can be rotated in both counter clockwise or clockwise direction for filter selection.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW_4800b5c7-0e00-48f8-844b-6076bd17b8f3.jpg?v=1765070427\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-3708\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW_4800b5c7-0e00-48f8-844b-6076bd17b8f3.jpg?v=1765070427\" alt=\"EFW\" width=\"600\" height=\"600\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOnly one USB Cable is enough to power up the EFW, the max power consumption is around 120ma@5V, so you can connected it form the USB2.0 hub of our cooled cameras.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/P1010774_b895cb82-292a-4300-9c6f-cb355312b214.jpg?v=1765070430\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-3715\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/P1010774_b895cb82-292a-4300-9c6f-cb355312b214.jpg?v=1765070430\" alt=\"P1010774\" width=\"800\" height=\"800\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe distance between the filter and sensor is around 10mm when you connect it to ASI1600.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSo 1.25″ filters won't have vignetting up to F5 focal ratio scope and 31mm filter won't have vignetting up to F2 lens\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOur new RGBL filters are recommended to work with ASI1600, it will offer nearly 1:1:1 RGB color balance.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWhat`s in the box?\u003c\/h3\u003e\n\u003col data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eEFW-Mini body\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1.25″ cover\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eT2 nosepiece\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1.25″ holder(with cover and 2 screws)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eT2-T2 adapter(male)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan lang=\"SV\" data-mce-fragment=\"1\"\u003eA bag of filter masks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUSB2.0 2m cable\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan lang=\"SV\" data-mce-fragment=\"1\"\u003ePhillips screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan lang=\"SV\" data-mce-fragment=\"1\"\u003eA bag of M2 screws\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFWmini_3d3d54e5-6a67-4f71-be2c-b16bb78251ac.jpg?v=1765070434\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"aligncenter size-full wp-image-10856\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFWmini_3d3d54e5-6a67-4f71-be2c-b16bb78251ac.jpg?v=1765070434\" alt=\"EFWmini\" width=\"960\" height=\"678\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eMechanical drawing:\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/drawing2_83f1591e-7488-4f39-ba28-1c75b68bff03.jpg?v=1765070437\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-3707\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/drawing2_83f1591e-7488-4f39-ba28-1c75b68bff03.jpg?v=1765070437\" alt=\"drawing\" width=\"641\" height=\"570\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eHow to use it?\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eYou just need to plugin the EFW mini with USB2.0 cable and install the   \u003ca href=\"http:\/\/astronomy-imaging-camera.com\/software\/ZWO%20EFW%20ASCOM%20Setup%20V1.0.0.6.exe\" data-mce-fragment=\"1\"\u003eASCOM driver\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThere are  ZWO Filter Wheel(1) and ZWO Filter Wheel(2) to select,  you can use either one of them\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThere are 2 ASCOM is for controlling 2 EFW-Mini with one software.\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":28874473963600,"sku":"ZWO EFW-MINI","price":277.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-wheel-zwo-5-position-1-25-or-31mm-mini-electronic-filter-wheel-zwo-efw-mini-11565900431440.jpg?v=1736013996"},{"product_id":"zwo-new-1-25-lrgb-4-piece-filter-set-for-asi1600-cameras","title":"ZWO \"NEW\" LRGB 4 Piece Filter Set","description":"\u003cp\u003eThe New ZWO LRGB Filters are designed to approximately equalize the flux of the ASI1600 mono sensor.  They feature better transmission, better coatings and better color separation than the original ZWO LRGB filters.\u003c\/p\u003e\n\u003ch4\u003e  Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe RGB color weighting is approximately 1:1:1\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wavefront\u003c\/li\u003e\n\u003cli\u003emore than 92% transmission\u003c\/li\u003e\n\u003cli\u003eInfrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli\u003ePrecision off-band blocking\u003c\/li\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eSmall spectral \"gap\" to minimize effect of light pollution\u003c\/li\u003e\n\u003cli\u003eMore Par focal – thickness 1.9+\/-0.03 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease Note: The 31mm and 36mm filters are unmounted \u003c\/p\u003e\n\u003ch4\u003e\u003c\/h4\u003e\n\u003ch4\u003e\u003c\/h4\u003e\n\u003ch4\u003eTransmission Curve\u003c\/h4\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/RGBL-ASI1600_d728b581-de8f-4fd9-a2e1-80b4c8a4810b.jpg?v=1765069977\"\u003e\u003cimg class=\"alignnone size-full wp-image-3734\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/RGBL-ASI1600_d728b581-de8f-4fd9-a2e1-80b4c8a4810b.jpg?v=1765069977\" alt=\"RGBL ASI1600\" width=\"958\" height=\"686\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cp\u003eThickness: 5.5mm+3.5mm(thread)\u003c\/p\u003e\n\u003cp\u003eThread: M28.5 * 0.6\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\"","offer_id":32247716577360,"sku":"ZWO LRGB1.25NEW","price":207.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":32247716610128,"sku":"ZWO LRGB31mmNEW","price":228.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":32247716642896,"sku":"ZWO LRGB36","price":279.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32247716675664,"sku":"ZWO LRGB2","price":419.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-1-25-zwo-new-lrgb-4-piece-filter-set-11615547359312.jpg?v=1736013995"},{"product_id":"zwo-4-piece-31mm-ha-sii-oiii-7nm-filter-set","title":"ZWO 3 Piece Ha\/SII\/OIII 7nm Filter Set","description":"\u003cp data-mce-fragment=\"1\"\u003eNarrowband filter does not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E7_BB_84_E5_90_88_EF_BC_882_EF_BC_89_1e3ede84-f143-4a39-94f9-bd1e6904abc8.jpg?v=1765070217\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E7_BB_84_E5_90_88_EF_BC_882_EF_BC_89_1e3ede84-f143-4a39-94f9-bd1e6904abc8.jpg?v=1765070217\"\u003e\u003cimg decoding=\"async\" class=\"alignnone size-full wp-image-18746\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E7_BB_84_E5_90_88_EF_BC_882_EF_BC_89_1e3ede84-f143-4a39-94f9-bd1e6904abc8.jpg?v=1765070217\" alt=\"组合（2）\" width=\"800\" height=\"800\" srcset=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/组合（2）.jpg 800w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/组合（2）-150x150.jpg 150w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/组合（2）-300x300.jpg 300w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/组合（2）-180x180.jpg 180w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/组合（2）-600x600.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/E7_BB_84_E5_90_88_EF_BC_882_EF_BC_89_1e3ede84-f143-4a39-94f9-bd1e6904abc8.jpg?v=1765070217\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIt can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eForm 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTechnical Parameter:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eName: ZWO New narrowband 2″ filter\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSize: 2″\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThickness: 5mm+2.5mm(thread)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eGlass thickness: 1.85mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThread: M48*0.75 male thread\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe ZWO H-Alpha filter has a Band-pass of  7nm and passes light at 656nm  wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_fd58b2be-f213-49f1-9255-620da85ce9c4.jpg?v=1765070220\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_fd58b2be-f213-49f1-9255-620da85ce9c4.jpg?v=1765070220\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-18743\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_fd58b2be-f213-49f1-9255-620da85ce9c4.jpg?v=1765070220\" alt=\"Ha 7nm Filter\" width=\"800\" height=\"800\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_fd58b2be-f213-49f1-9255-620da85ce9c4.jpg?v=1765070220 800w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-150x150.jpg 150w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-300x300.jpg 300w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-180x180.jpg 180w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-600x600.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_fd58b2be-f213-49f1-9255-620da85ce9c4.jpg?v=1765070220\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a Band-pass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/SII-7nm-Filter_jpg_e51c8f52-30e9-4352-9fa5-64c805a6fade.jpg?v=1765070224\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/SII-7nm-Filter_jpg_e51c8f52-30e9-4352-9fa5-64c805a6fade.jpg?v=1765070224\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-18744\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/SII-7nm-Filter_jpg_e51c8f52-30e9-4352-9fa5-64c805a6fade.jpg?v=1765070224\" alt=\"SII 7nm Filter.jpg\" width=\"800\" height=\"800\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/SII-7nm-Filter_jpg_e51c8f52-30e9-4352-9fa5-64c805a6fade.jpg?v=1765070224 800w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/SII-7nm-Filter.jpg-150x150.jpg 150w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/SII-7nm-Filter.jpg-300x300.jpg 300w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/SII-7nm-Filter.jpg-180x180.jpg 180w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/SII-7nm-Filter.jpg-600x600.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/SII-7nm-Filter_jpg_e51c8f52-30e9-4352-9fa5-64c805a6fade.jpg?v=1765070224\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe ZWO narrowband O-III 7nm filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through,  which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulas in a totally new light, no matter how polluted your skies may be!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/OIII-7nm-Filter_70bc2e07-86e0-4d37-8b8e-692b8597c6a2.jpg?v=1765070227\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/OIII-7nm-Filter_70bc2e07-86e0-4d37-8b8e-692b8597c6a2.jpg?v=1765070227\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-18745\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/OIII-7nm-Filter_70bc2e07-86e0-4d37-8b8e-692b8597c6a2.jpg?v=1765070227\" alt=\"OIII 7nm Filter\" width=\"800\" height=\"800\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/OIII-7nm-Filter_70bc2e07-86e0-4d37-8b8e-692b8597c6a2.jpg?v=1765070227 800w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/OIII-7nm-Filter-150x150.jpg 150w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/OIII-7nm-Filter-300x300.jpg 300w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/OIII-7nm-Filter-180x180.jpg 180w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/OIII-7nm-Filter-600x600.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/OIII-7nm-Filter_70bc2e07-86e0-4d37-8b8e-692b8597c6a2.jpg?v=1765070227\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTechnical Data\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFWHM：7±0.5nm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFine-optically polished to ensure accurate 1\/4 wavefront  over the both surfaces\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAbout 90% transmission at H-alpha line 656nm (H-Alpha filter )\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAbout 90% transmission at SII line 672nm (SII filter )\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAbout 90% transmission at major OIII line 500nm (OIII filter )\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eInfrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u0026lt;0.1% transmission of off-band, OD3(Optical Density)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTransmission Curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_dce1318a-33c1-4e80-8c06-6caff0b1f697.jpg?v=1765070231\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_dce1318a-33c1-4e80-8c06-6caff0b1f697.jpg?v=1765070231\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-11027\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_dce1318a-33c1-4e80-8c06-6caff0b1f697.jpg?v=1765070231\" alt=\"NB filters TP\" width=\"989\" height=\"633\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_dce1318a-33c1-4e80-8c06-6caff0b1f697.jpg?v=1765070231 989w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/NB-filters-TP-300x192.jpg 300w\" sizes=\"(max-width: 989px) 100vw, 989px\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_dce1318a-33c1-4e80-8c06-6caff0b1f697.jpg?v=1765070231\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\"","offer_id":48567106273499,"sku":"ZWO NB7nm1.25","price":517.0,"currency_code":"CAD","in_stock":false},{"title":"31mm","offer_id":32247654056016,"sku":"ZWO NB7nmD31","price":591.0,"currency_code":"CAD","in_stock":false},{"title":"36mm","offer_id":32247654088784,"sku":"ZWO NB7nmD36","price":671.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32247654121552,"sku":"ZWO NB7nmD2","price":979.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-1-25-zwo-3-piece-ha-sii-oiii-7nm-filter-set-28464683614390.jpg?v=1736013993"},{"product_id":"optolong-lrgb-1-25-filter-set","title":"Optolong LRGB Filter Set","description":"\u003cp\u003e\u003cspan\u003eThe Optolong LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The filters divide the spectrum into red, green, blue and luminance. \u003c\/span\u003e\u003cspan\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. The gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFine-optically polishing for double-sides ensures accurate λ\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUltrasonic wave cleaning substrate with purified water removes impurities and dust effectively\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIRO source assisted coating for durability and resistance to scratching, as well as stability on CWL (central wavelength). No deviation from temperature change.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConstant stringent quality testing processes - Each filter is tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure each filter is a high-quality product\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best service!\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e31mm and 36mm filters are unmounted\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTavg: T\u0026gt;95%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoating Wavelength: 300-1050nm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptical Density: OD3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eSurface Quality: 60\/40\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTransmitted Wavefront RMS: λ\/4\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eParallelism (arc sec): 30s\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFilter Casing Width: 4.9mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":39452237463734,"sku":"OptolongLRGB-1.25\"","price":325.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":39452237496502,"sku":"OptolongLRGB-31mm","price":354.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":39452237529270,"sku":"OptolongLRGB-36mm","price":382.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":39452237562038,"sku":"OptolongLRGB-2\"","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-1-25-optolong-lrgb-filter-set-11848068530256.jpg?v=1668533918"},{"product_id":"2-telescope-filter-drawer-system-with-2-drawers","title":"Telescope Filter Drawer System with 2 Drawers","description":"\u003cp\u003eThis all-metal filter drawer system allows you to quickly change filters without adding a bulky filter wheel to your system.\u003c\/p\u003e\n\u003cp\u003eThe drawers are magnetically locked into place, creating a good seal against moisture and avoiding accidental drops.\u003c\/p\u003e\n\u003cp\u003eFilters up to 7mm in thickness (not including threads) are supported.  The 2-sided filters from Optolong will work in this drawer.\u003c\/p\u003e\n\u003cp\u003e2 filter drawers are included, along with optionally used spacing rings.  Additional drawers can be ordered.  The manufacturer has recently changed the spacer ring material to metal.\u003c\/p\u003e\n\u003cp\u003eThe drawer system weights about 100g.\u003c\/p\u003e\n\u003cp\u003eThe camera side of the filter has male M42 or M48 threads depending on the model chosen, while the scope side has female M48 threads.\u003c\/p\u003e\n\u003cp\u003eThe body of the filter slide takes up 16.5mm of back-focus in the imaging train.\u003c\/p\u003e\n\u003cp\u003eFor purchasing additional filter drawers, please \u003ca href=\"https:\/\/telescopescanada.ca\/products\/2-additional-filter-drawers-for-the-telescope-filter-drawer-system?variant=32262223462480\"\u003eClick Here\u003c\/a\u003e\u003c\/p\u003e","brand":"Telescopes Canada","offers":[{"title":"2\"  M48\/M48","offer_id":44365278150875,"sku":"2\" FILTER DRAWER M48\/M48","price":129.0,"currency_code":"CAD","in_stock":true},{"title":"2\"  M48\/M42","offer_id":46642120032475,"sku":"2\" FILTER DRAWER M48\/M42","price":129.0,"currency_code":"CAD","in_stock":true},{"title":"36mm M48\/M42","offer_id":29091952689232,"sku":"36mm FILTER DRAWER M48\/M42","price":129.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\"  M48\/M42","offer_id":29091952623696,"sku":"1.25\" FILTER DRAWER M48\/M42","price":129.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/telescopes-canada-accessory-telescope-filter-drawer-system-with-2-drawers-11790428799056.png?v=1668512318"},{"product_id":"astronomik-1-25-h-alpha-12nm-ccd-filter-m28-5","title":"Astronomik Hydrogen-Alpha 12nm CCD Filter","description":"\u003cp\u003eThe Astronomik H-alpha filter is a narrow band filter for CCD photography. The filter lets the H-alpha light of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive.\u003c\/p\u003e\n\u003cp\u003eThe full width at half-maximum (FWHM) of 12nm is optimized for the use with common CCD cameras and allows the use of very fast optics. It should be noted that the filter has a transmission of up to 99%. Another advantage of the 12nm filters is the availability of guiding stars for cameras with a built-in-auto guider (SBIG). If you use a very strong filter like our 6nm filter you often won't find a usable guide star. The range of application extends from 1:2.8 to 1:15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play.\u003c\/p\u003e\n\u003ch4\u003eMain use\u003c\/h4\u003e\n\u003cp\u003eThe Astronomik H-alpha-CCD (12nm version) increases the contrast between objects, in this case between the H-alpha emission line and the sky glow background. Our Astronomik H-alpha-CCD (12nm version) completely suppresses the emission lines of artificial lighting (mercury (Hg) and sodium (Na)) and sky glow.\u003c\/p\u003e\n\u003ch4\u003eOther uses\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eWhen using the OIII CCD and the SII-CCD filters you can obtain three-color images of emission line objects (gas nebulae) from locations with very strong light pollution. To do so, you would take an image in three different wavelengths, select each one as a color-channel in Photoshop and paste them together as a color image.\u003c\/li\u003e\n\u003cli\u003eThe Astronomik H-Alpha filters may NOT be used for solar observation.\u003c\/li\u003e\n\u003cli\u003eIf you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Unsuitable\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Unsuitable\u003c\/li\u003e\n\u003cli\u003eFilm photography: Reasonable, but very long exposure times\u003c\/li\u003e\n\u003cli\u003eCCD photography: Very good, huge contrast enhancement at H II-emission nebulae\u003c\/li\u003e\n\u003cli\u003eDSLR photography (original): Good, reduced sensitivity in the H-alpha band\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Very good, huge contrast enhancement at H II-emission nebulae\u003c\/li\u003e\n\u003cli\u003eDSLR photography (MC modified): Very good, huge contrast enhancement at H II-emission nebulae\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Deep Sky): Good, good contrast enhancement with bright objects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSizes Available From Astronomik - Please ask us if we don't have a price listed for the one you would like\u003c\/h4\u003e\n\u003cp\u003e1.25\" (M28.5)\u003cbr\u003e2\" (M48)\u003cbr\u003eT-thread Cell (M42x0.75)\u003cbr\u003eSC-Cell (2\" \/ 24TPI)\u003cbr\u003eØ27mm\u003cbr\u003eØ31mm\u003cbr\u003eØ36mm\u003cbr\u003eØ42mm\u003cbr\u003eØ50mm\u003cbr\u003e50x50mm\u003cbr\u003eEOS APS-C Clip-Filter\u003cbr\u003eEOS XL Clip-Filter\u003cbr\u003eEOS R XL Clip-Filter\u003cbr\u003eSony alpha Clip-Filter\u003cbr\u003eM52\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTypical transmission of more then 95% at the H-alpha line (656nm)\u003c\/li\u003e\n\u003cli\u003eComplete blocking from all disturbing wavelengths in the infrared\u003c\/li\u003e\n\u003cli\u003ePar focal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eCompletely resistant against high humidity, scratches and aging effects\u003c\/li\u003e\n\u003cli\u003eDiffraction limited, the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n\u003cli\u003eAstronomik filters are delivered in a high-quality, long lasting, filter box\u003c\/li\u003e\n\u003cli\u003eSince 2008 we do ship filters with a completely new design. Any kind of halo or strange reflection is a matter of past\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (M28.5)","offer_id":29178315145296,"sku":"8h0050","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"31mm, Protective Ring\/Unthreaded","offer_id":32737805336656,"sku":"8h00fn","price":231.0,"currency_code":"CAD","in_stock":true},{"title":"36mm, Protective Ring\/Unthreaded","offer_id":32737799569488,"sku":"8h00fo","price":258.0,"currency_code":"CAD","in_stock":true},{"title":"2\" (M48)","offer_id":29271838228560,"sku":"8h0051","price":408.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS APS-C","offer_id":29178347028560,"sku":"8h00ih","price":272.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS M","offer_id":37530577731766,"sku":"8h00s2","price":285.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS R XL","offer_id":39748391076022,"sku":"8h11gj","price":463.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS XL","offer_id":32247331881040,"sku":"8h00lf","price":435.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon XL","offer_id":39660928958646,"sku":"8h11aw","price":463.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon Z XL","offer_id":46268593438939,"sku":"8h11l4","price":463.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Sony Alpha 7","offer_id":43021801324763,"sku":"8h00xg","price":463.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/astronomik-filter-1-25-m28-5-astronomik-hydrogen-alpha-12nm-ccd-filter-11864175640656.jpg?v=1736365669"},{"product_id":"astronomik-cls-ccd-filter","title":"Astronomik CLS CCD Light Pollution Filter","description":"\u003cp\u003e\u003cstrong\u003eAstronomik CLS CCD filters are suitable under light-polluted skies for DSLR Cameras which have been modified for astronomical use.  For unmodified DSLRs, use \u003ca href=\"https:\/\/telescopescanada.ca\/collections\/no-stock-astronomik\/products\/astronomik-cls-light-pollution-filter?_pos=1\u0026amp;_sid=49a59a5b9\u0026amp;_ss=r\u0026amp;variant=32783012069456\" target=\"_blank\"\u003eAstronomik CLS filters\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter enhances the contrast between all deep-sky objects and the background.\u003cbr\u003e\u003cbr\u003eThe CLS-CCD Filter enhances the contrast between astronomical objects and the background. Due to the wider transmission curve compared to UHC filters, a greater amount of light will pass the filter. Stars will be less dimmed. This filter has been optimized to block as much spurious light as possible and simultaneously provide the best performance for 'useful' light. A good filter for DSLR-, CCD- and film b\/w-photography as well as observation of deep-sky-objects with telescopes or photo lenses of all aperture f\/3 and above.\u003c\/p\u003e\n\u003ch4\u003eMain use\u003c\/h4\u003e\n\u003cp\u003eThe filter blocks completely emission lines of artificial light sources like streetlights (e.g. sodium- and mercury-vapor) as well as the airglow. All 'important' emission lines as well as the spectral range of the night-adapted eye are being passed. The supplementary IR-blocking layer allows the use for DSLR- and Webcams without an integrated IR-block filter.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eOther uses\u003c\/h4\u003e\n\u003cp\u003eEasier resolution of Double Stars\u003cbr\u003eWith the EOS-Clip model, photography with DSLR cameras is feasible even under extreme light-polluting conditions without shifting the white balance.\u003cbr\u003eThe 1,25\" and 2\" socket models can be used for observations from light-polluted areas.\u003cbr\u003eIf you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel\u003cbr\u003eAlternatives\u003cbr\u003eCLS: For cameras with an integrated IR-filter or for visual observation.\u003c\/p\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Good, to reduce light pollution by mercury-vapour lamps (streetlight)\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Reasonable, an UHC-E or UHC filter is more suitable\u003c\/li\u003e\n\u003cli\u003eFilm photography: Very good, colour balance is near perfect\u003c\/li\u003e\n\u003cli\u003eCCD photography: Very good, optimized rejection of light pollution\u003c\/li\u003e\n\u003cli\u003eDSLR photography (original): Good, colour balance shifted but contrast enhanced\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Very good, colour balance is near perfect\u003c\/li\u003e\n\u003cli\u003eDSLR photography (MC modified): Very good, colour balance is near perfect\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Deep Sky): Very good, if light pollution is a big problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSizes Available From Astronomik - Please ask us if we don't have a price listed for the one you would like\u003c\/h4\u003e\n\u003cp\u003e1.25\" (M28.5)\u003cbr\u003e2\" (M48)\u003cbr\u003eT-thread Cell (M42x0.75)\u003cbr\u003eSC-Cell (2\" \/ 24TPI)\u003cbr\u003eØ27mm\u003cbr\u003eØ31mm\u003cbr\u003eØ36mm\u003cbr\u003eØ42mm\u003cbr\u003eØ50mm\u003cbr\u003e50x50mm\u003cbr\u003eEOS APS-C Clip-Filter\u003cbr\u003eEOS APS-C XT Clip-Filter\u003cbr\u003eEOS M Clip-Filter\u003cbr\u003eEOS XL Clip-Filter\u003cbr\u003eSony Alpha Clip-Filter\u003cbr\u003eNikon XL Clip-Filter\u003cbr\u003ePentax K Clip-Filter\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e95% transmission at 486nm (H-beta)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 496nm (O\u003cspan face=\"Times New Roman, Times, serif\" style=\"font-family: 'Times New Roman', Times, serif;\"\u003eIII\u003c\/span\u003e)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 501nm (O\u003cspan face=\"Times New Roman, Times, serif\" style=\"font-family: 'Times New Roman', Times, serif;\"\u003eIII\u003c\/span\u003e)\u003c\/li\u003e\n\u003cli\u003e97% transmission at 656nm (H-alpha)\u003c\/li\u003e\n\u003cli\u003epass from 450 to 520nm and from 640 to 690nm\u003c\/li\u003e\n\u003cli\u003ePar focal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eCompletely resistant against high humidity, scratches and aging effects\u003c\/li\u003e\n\u003cli\u003eDiffraction limited, the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n\u003cli\u003eAstronomik filters are delivered in a high-quality, long lasting, filter box\u003c\/li\u003e\n\u003cli\u003eSince 2008 we do ship filters with a completely new design. Any kind of halo or strange reflection is a matter of past\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003c\/h4\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (M28.5)","offer_id":29271150624848,"sku":"8h00dp","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"31mm, Protective Ring\/Unthreaded","offer_id":32737887125584,"sku":"8h00fg","price":176.0,"currency_code":"CAD","in_stock":true},{"title":"36mm, Protective Ring\/Unthreaded","offer_id":32737887584336,"sku":"8h00fh","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"2\" (M48)","offer_id":29271239458896,"sku":"8h00dq","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS APS-C","offer_id":29271150657616,"sku":"8h00dn","price":217.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS M","offer_id":37545048735926,"sku":"8h00r7","price":231.0,"currency_code":"CAD","in_stock":true},{"title":"XT Clip-Filter EOS APS-C","offer_id":32140185174096,"sku":"8h00kf","price":244.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS XL","offer_id":40392384708790,"sku":"8h00ld","price":326.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS R XL","offer_id":40393024143542,"sku":"8h11ga","price":340.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon XL","offer_id":32854975119440,"sku":"8h11at","price":326.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Pentax K-1","offer_id":37545058271414,"sku":"8h11eg","price":340.0,"currency_code":"CAD","in_stock":true},{"title":"Clip Filter Sony Alpha 7","offer_id":32854971154512,"sku":"8h00xb","price":326.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon Z XL","offer_id":38008705679542,"sku":"8h11ky","price":340.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/astronomik-filter-1-25-m28-5-astronomik-cls-ccd-light-pollution-filter-11936256852048.jpg?v=1736365664"},{"product_id":"astronomik-uhc-light-pollution-filter","title":"Astronomik UHC Visual High Contrast Filter","description":"\u003cp\u003eThe Astronomik UHC is THE filter for visual observing.\u003cbr\u003eYou will enjoy using your Astronomik UHC filter because you will see more stars and more details in deep-sky-objects compared to using filters from all other manufacturers.\u003cbr\u003e\u003cbr\u003eThe Astronomik UHC (Ultra High Contrast) filter allows the transmission of nearly 100% of the radiation from both O-III and the H beta lines. Though the second window for the H-alpha-line is not intended for visual observing, it is important, if the filter is used with an electronic device. All annoying, scattered light from other wavelength sources, including local artificial light pollution, is reliably filtered out. With this strong blocking of the sky background an unexpected wealth of detail becomes visible for gas nebulae and planetary nebulae.\u003c\/p\u003e\n\u003ch4\u003eMain use\u003c\/h4\u003e\n\u003cp\u003eAstronomik UHC filters' astounding high light transmission brings better views of deep-sky-objects even to small telescopes! The high transmission of our optical glass filters means that enough light is available to allow successful visual observations with telescopes beginning at 2\" (50mm) aperture. Our Astronomik filters are optimized for use with telescope focal length f \/ ratios of f\/4 to f\/15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play. Another major advantage of our Astronomik UHC filter is the high optical quality of the filter glass. When using Astronomik UHC filters you will quickly notice the same needle-sharp stars which you are familiar with from your astronomical instrument without any filter!\u003c\/p\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Very good, for telescopes of all apertures and high exit pupil\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Very good, for telescopes from 100 mm aperture\u003c\/li\u003e\n\u003cli\u003eFilm photography: Reasonable, but very long exposure time\u003c\/li\u003e\n\u003cli\u003eCCD photography: Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eDSLR photography (original): Good, colour balance shifted but contrast enhanced\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Very good, colour balance is near perfect\u003c\/li\u003e\n\u003cli\u003eDSLR photography (MC modified): Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Deep Sky): Good, if light pollution is a big problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSizes Available From Astronomik - Please ask us if we don't have a price listed for the one you would like\u003c\/h4\u003e\n\u003cp\u003e1.25\" (M28.5)\u003cbr\u003e2\" (M48)\u003cbr\u003eT-thread Cell (M42x0.75)\u003cbr\u003eSC-Cell (2\" \/ 24TPI)\u003cbr\u003eØ31mm\u003cbr\u003eØ36mm\u003cbr\u003eØ50mm\u003cbr\u003eEOS APS-C Clip-Filter\u003cbr\u003eEOS XL Clip-Filter\u003cbr\u003eSony Alpha Clip-Filter\u003cbr\u003eM52\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003etypically. 97% transmission at 486nm (H-beta)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003etypically. 97% transmission at 496nm (O\u003c\/span\u003e\u003cspan\u003eIII\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003etypically. 97% transmission at 501nm (O\u003c\/span\u003e\u003cspan\u003eIII\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003etypically. 97% transmission at 656nm (H alpha)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eoptimum position of transmission for telescopes with focal ratios from f\/10 to f\/3,5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEntire Blocking of annoying wavelengths\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eIdeal All-round Deep Sky filter even for small telescopes\u003c\/li\u003e\n\u003cli\u003eNot sensitive to humidity or aging\u003c\/li\u003e\n\u003cli\u003eScratch-resistant!\u003c\/li\u003e\n\u003cli\u003eExcellent carrier material. The optical performance of your telescope is not reduced by the filter in any way.\u003c\/li\u003e\n\u003cli\u003ePar focal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eCompletely resistant against high humidity, scratches and aging effects\u003c\/li\u003e\n\u003cli\u003eDiffraction limited, the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n\u003cli\u003eAstronomik filters are delivered in a high-quality, long lasting, filter box\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (M28.5)","offer_id":29271743725648,"sku":"8h0011","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"31mm, Protective Ring\/Unthreaded","offer_id":32739648536656,"sku":"8h00i0","price":162.0,"currency_code":"CAD","in_stock":true},{"title":"36mm, Protective Ring\/Unthreaded","offer_id":32739649126480,"sku":"8h00i1","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"2\" (M48)","offer_id":29271743955024,"sku":"8h0012","price":272.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS APS-C","offer_id":29271743823952,"sku":"8h00ie","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"UHC Clip-Filter EOS XL","offer_id":32718189068368,"sku":"8h00ls","price":299.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/astronomik-filter-1-25-m28-5-astronomik-uhc-visual-high-contrast-filter-11936393265232.jpg?v=1736365661"},{"product_id":"astronomik-oiii-visual-filter","title":"Astronomik OIII Visual Nebula Filter","description":"\u003cstrong data-mce-fragment=\"1\"\u003eFrom the start, the Astronomik O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilter has been very specifically designed for the visual observation of gaseous and planetary nebulae. The extremely narrow pass band of the two O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003elines brings a substantial contrast gain to these lines even under best observation conditions. On faint super nova remnants and faint planetary nebulae the Astronomik O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilter will often make the difference as to whether the object can bee seen or not!\u003c\/strong\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe optimal aperture ratio for the use of the filter is 1:3.7 to 1:15 with apertures of more than 6\" (150mm). Transmission losses and chromatic distortions, which arise with other filters, occur with Astronomik O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilters only when extremely bright aperture ratios of 1:3 and more come into play. The Astronomik O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilters thus can expand the view of dispersed objects, generally speaking, to the whole visual field of view of the eyepiece and are not limited to only the center of the eyepiece.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eMain use\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSince enough light must be available to make use of the O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilter it is best to use this filter with apertures of more than 6\" (150mm). Smaller instruments do not gather enough light for meaningful and satisfying astronomical work. However, please note: Many experienced Deep Sky observers, with apertures of more than 10\" (250mm), prefer using the O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilter instead of the more versatile UHC filter. Due to the high optical quality of the Astronomik O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efilter substrate you will see the same needle-sharp stars as you would from your regular telescope.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" data-mce-href=\"https:\/\/www.astronomik.com\/en\/visual-filters.html\" href=\"https:\/\/www.astronomik.com\/en\/visual-filters.html\"\u003emore information about the visual Astronomik filters\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"basic ui-accordion\" data-mce-fragment=\"1\" id=\"list1b\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eSuitability\u003c\/h4\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eVisual observation (dark skies): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eVisual observation (urban skies): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFilm photography: It depends, very long exposure time\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCCD photography: Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDSLR photography (original): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDSLR photography (astro modified): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDSLR photography (MC modified): Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWebcam \/ Video (Deep Sky): Reasonable, if light pollution is a big problem and O\u003cspan data-mce-fragment=\"1\"\u003eIII\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eObjects are being observed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eTechnical Data\u003c\/h4\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003etypically. 95% transmission at 496nm (OIII)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003etypically. 95% transmission at 501nm (OIII)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eComplete blocking of all disturbing wavelength coverages\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eThe ideal filter for telescopes 10 \" (25cm) and larger\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMain operational use: Planetary nebulas \u0026amp; super nova remnants\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNo moisture-sensitivity, no aging, and totally scratch-proof\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eExcellent carrier material - substrate is optically polished. The optical performance (resolution \u0026amp; contrast) of your telescope is not reduced in any way by the filter.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePar focal with other Astronomik filters\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCompletely resistant against high humidity, scratches and aging effects\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDiffraction limited, the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAstronomik filters are delivered in a high-quality, long lasting, filter box\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (M28.5)","offer_id":29272317821008,"sku":"8h0006","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"2\" (M48)","offer_id":29272317886544,"sku":"8h0045","price":272.0,"currency_code":"CAD","in_stock":true},{"title":"SC Rear Cell (2''\/24TPI)","offer_id":32737880408144,"sku":"8h00bk","price":312.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/astronomik-filter-1-25-m28-5-astronomik-oiii-visual-nebula-filter-11936430489680.jpg?v=1736365659"},{"product_id":"optolong-1-25-s-ii-h-alpha-o-iii-unmounted-3-piece-filter-set","title":"Optolong 7nm\/6.5nm SHO S-II\/H-Alpha\/O-III 3 Piece Filter Set","description":"\u003cp\u003e\u003cspan\u003eThe Optolong SHO narrowband filter set is designed for use with astronomical monochrome CCD, CMOS and DSLR cameras. These filters set are commonly used by astrophotographers to present their photos in Hubble Palette. This filter set includes H-Alpha 7nm, SII 6.5nm and OIII 6.5nm, covering the emission lines of 656.3nm, 671.6nma and 500.7nm respectively.  The filters provide high transmittance in order to obtain the maximum contrast of nebulae while cutting out background emission and suppressing bright starlight.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFine-optically polishing for double-sides-- Ensure accurate λ\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUltrasonic wave cleaning substrate with purified water to remove impurities and dust effectively\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIRO source assisted coating - For durability and resistance to scratching, as well as stability on CWL (central wavelength).  No deviation from temperature change.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConstant stringent quality testing processes - Each filter is tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best service!\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!--30--\u003e\n\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCWL(center of wavelength): H-Alpha 656.3nm\/SII 671.6nm\/OIII 500.7nm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFWHM: H-Alpha7nm\/SII 6.5nm\/OIII6.5nm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTpeak: \u0026lt;85%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptical Density: OD 3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSurface Quality: 60\/40\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTransmitted Wavefront RMS: λ\/4\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eParallelism(arc sec): 30s\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFilter Casing Width: 4.9mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":39452183068854,"sku":"Optolong-SHO-1.25\"","price":694.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":39452183101622,"sku":"Optolong-SHO-Unmounted-31MM","price":677.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":39452186378422,"sku":"Optolong-SHO-Unmounted-36MM","price":780.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":39452186869942,"sku":"Optolong-SHO-2\"","price":950.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-1-25-optolong-7nm-6-5nm-sho-s-ii-h-alpha-o-iii-3-piece-filter-set-13080960860240.jpg?v=1668535177"},{"product_id":"optolong-1-25-lrgb-h-alpha-7nm-sii-6-5nm-and-oiii-6-5nm-7-piece-filter-set","title":"Optolong LRGBSHO 7nm 7 Piece Filter Set","description":"\u003cp\u003e\u003cspan\u003eThe LRGB filter set is designed for maximum contrast, with extremely high gradients for clear differentiation of colors. This filter set divides the spectrum into its component colors - red, green, blue, plus luminance. The \u003c\/span\u003e\u003cspan\u003eOIII emission line overlaps blue and green filters, with maximum transmission to allow for high efficiency and natural color imaging. The gap between the green and red filters serves to block out the primary sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe included SHO filter set is generally used with astronomical monochrome CCDs and DSLRs. These types of filters are commonly used by astrophotographers to present their photos in the Hubble palette. This filter set includes narrowband filters for H-Alpha 7nm, SII 6.5nm and OIII 6.5nm, which cover the emission lines 656.3nm, 671.6nm and 500.7nm. The filters provide high light transmittance so as to obtain the maximum contrast with nebulae while cutting out background emissions and suppressing starlight and light pollution\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e31mm and 36mm filters are unmounted\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ch4\u003eLRGB Specifications \u003c\/h4\u003e\nTavg: T\u0026gt;95%\u003cbr\u003eCoating Wavelength: 300-1050nm\u003cbr\u003eOptical Density: OD3\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism (arc sec): 30s\u003cbr\u003e\u003cspan\u003eFilter Casing Width: 4.9mm\u003c\/span\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch4\u003eSHO Specifications\u003c\/h4\u003e\nCWL (center of wavelength): H-Alpha 656.3nm, SII 671.6nm, OIII 500.7nm\u003cbr\u003eFWHM: H-Alpha7nm, SII 6.5nm, OIII6.5nm\u003cbr\u003eTpeak: \u0026lt;85%\u003cbr\u003eOptical Density: OD 3\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism(arc sec): 30s \u003cbr\u003eFilter Casing Width: 4.9mm\u003cbr\u003e\n\u003cp\u003e\u003cbr\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":39452251291830,"sku":"OPTOLONG-LRGBSHO-1.25\"-1","price":944.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":39452251324598,"sku":"OPTOLONG-LRGBSHO-31mm","price":1001.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":39452251357366,"sku":"OPTOLONG-LRGBSHO-36mm","price":1101.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":39452251390134,"sku":"OPTOLONG-LRGBSHO-2\"","price":1433.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-1-25-optolong-lrgbsho-7nm-7-piece-filter-set-12759344873552.jpg?v=1668534287"},{"product_id":"optolong-1-25-lrgb-h-alpha-7nm-5-piece-filter-set","title":"Optolong LRGB + H-Alpha 7nm 5 Piece Filter Set","description":"\u003cp\u003e\u003cspan\u003eThe LRGB filter set is designed for maximum contrast, with extremely high gradients for clear differentiation of colors. This filter set divides the spectrum into its component colors - red, green, blue, plus luminance. The \u003c\/span\u003e\u003cspan\u003eOIII emission line overlaps blue and green filters, with maximum transmission to allow for high efficiency and natural color imaging. The gap between the green and red filters serves to block out the primary sodium light pollution line at 589nm and improves color balance and separation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe included H-Alpha filter set is generally used with astronomical monochrome CCDs and DSLRs. These types of filters are commonly used by astrophotographers to image fine nebulosity while cutting down on bright starlight, and can replace the red filter or luminance filter while performing narrowband imaging. The H-Alpha 7nm filter is centered on 656.3nm. It provides high light transmittance so as to obtain the maximum contrast with nebulae while cutting out background emissions and suppressing starlight and light pollution\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e31mm and 36mm filters are unmounted\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ch4\u003eLRGB Specifications \u003c\/h4\u003e\nTavg: T\u0026gt;95%\u003cbr\u003eCoating Wavelength: 300-1050nm\u003cbr\u003eOptical Density: OD3\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism (arc sec): 30s\u003cbr\u003e \u003cspan\u003eFilter Casing Width: 4.9mm\u003c\/span\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch4\u003eSHO Specifications\u003c\/h4\u003e\nCWL (center of wavelength): H-Alpha 656.3nm\u003cbr\u003eFWHM: H-Alpha7nm\u003cbr\u003eTpeak: \u0026lt;85%\u003cbr\u003eOptical Density: OD 3\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism(arc sec): 30s\u003cbr\u003eFilter Casing Width: 4.9mm\u003cbr\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":39452263940278,"sku":"OPTOLONG-LRGBHa-1.25\"","price":524.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":39452263973046,"sku":"OPTOLONG-LRGBHa-31mm","price":567.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":39452264005814,"sku":"OPTOLONG-LRGBHa-36mm\"","price":623.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":39452264038582,"sku":"OPTOLONG-LRGBHa-2\"","price":808.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-1-25-optolong-lrgb-h-alpha-7nm-5-piece-filter-set-12785959043152.jpg?v=1668534293"},{"product_id":"optolong-venus-u-planetary-filter","title":"Optolong Venus U Planetary Filter","description":"\u003cp\u003eThe Venus-U filter makes it possible to obtain photographs, CCD or video images in the UV-A (320-400nm) and observe Venus' cloud structures.\u003c\/p\u003e\n\u003ch4\u003eMain Use and Performance\u003c\/h4\u003e\n\u003cp\u003eFor use with monochrome CCD cameras. You will need to remove the cover glass of the sensor and internal UV-IR blocker in order to pass UV light. The same holds true for mono DSLRs that have built-in low pass filters, these needs to be removed. For DSLRs you will need a special UV lens together with camera body. The sensor of CCD or CMOS cameras are capable of detecting light in the 350-1100 nm range.\u003c\/p\u003e\n\u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\u003cp\u003eSchott substrate material\u003c\/p\u003e\n\u003cp\u003eThickness 2.0mm\u003cbr\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003cbr\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003cbr\u003e80% maximum transmission at spectral region 320-370nm\u003cbr\u003ePrecision off-band blocking on ultraviolet wavelength 200-280nm, visible and infrared spectral region\u003cbr\u003eCoating Parameter\u003cbr\u003e\u003cbr\u003eMulti-layers anti-reflection coating\u003cbr\u003eNon-cementing optical substrate coating\u003cbr\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength). Not affected by temperature change\u003cbr\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003cbr\u003eFilter Cell\u003cbr\u003e\u003cbr\u003eUltra-thin filter cell minimize vignetting by maximize possible clear aperture (clear aperture is 26mm for 1.25\"; 45mm for 2\")\u003cbr\u003eAirplane Grade Material | Precise CNC Machining | Sand Blasting Process | Black Anodized Finish | Extinction Treatment to Prevent Reflection | Laser Engraving No Fading\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":30271635488848,"sku":"Optolong-Venus-1.25\"","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":30271656067152,"sku":"Optolong-Venus-2\"","price":322.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-optolong-venus-u-planetary-filter-12786429296720.jpg?v=1668533560"},{"product_id":"optolong-h-alpha-7nm-filter","title":"Optolong Hydrogen-Alpha 7nm Filter","description":"\u003cp\u003e\u003cspan\u003eH-Alpha 7nm filter is the most popular narrowband filter, allowing 7nm bandwidth of light centered on a wavelength of 656nm through. It reduces the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow). This is the best choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFine-optically polishing for double-sides-- Ensure accurate λ\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUltrasonic wave cleaning substrate with purified water to remove impurities and dust effectively\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIRO source assisted coating - For durability and resistance to scratching, as well as stability on CWL (central wavelength).  No deviation from temperature change.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConstant stringent quality testing processes - Each filter is tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best service!\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cbr\u003e\n\u003cul\u003e\u003c\/ul\u003e\nCWL(center of wavelength): H-Alpha 656.3nm\u003cbr\u003eFWHM: H-Alpha7nm\u003cbr\u003eTpeak: \u0026lt;85%\u003cbr\u003eOptical Density: OD 3\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism(arc sec): 30s","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":30271806210128,"sku":"Optolong-H-Alpha-7nm-1.25\"","price":226.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":30271806275664,"sku":"Optolong-H-Alpha-7nm-31mm","price":240.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":30271806308432,"sku":"Optolong-H-Alpha-7nm-36mm","price":268.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":30271806242896,"sku":"Optolong-H-Alpha-7nm-2\"","price":325.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-C","offer_id":30272079462480,"sku":"Optolong-H-Alpha-7nm-Canon-EOS-C","price":311.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-FF","offer_id":32513386774608,"sku":"Optolong-H-Alpha-7nm-Canon-EOS-FF","price":311.0,"currency_code":"CAD","in_stock":true},{"title":"Sony-FF","offer_id":32579525378128,"sku":"Optolong-H-Alpha-7nm-Sony-FF","price":311.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-1-25-optolong-hydrogen-alpha-7nm-filter-12786529730640.png?v=1668534829"},{"product_id":"optolong-s-ii-6-5nm-filter","title":"Optolong Sulphur-II 6.5nm Filter","description":"\u003cp\u003eUse the Optolong S-II 6.5nm filter with the H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography\u003cbr\u003eNarrowband imaging with a SHO filter set can be done with the moon up in heavy light pollution, allowing you to image much more frequently that would otherwise be possible.\u003cbr\u003eHubble palette images can be made by combining H-alpha, OIII-CCD and SII-CCD images into a color rendering, such as the famous \"Pillars of Creation\" (M16 Eagle Nebula)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFine-optically polishing for double-sides-- Ensure accurate λ\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUltrasonic wave cleaning substrate with purified water to remove impurities and dust effectively\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIRO source assisted coating - For durability and resistance to scratching, as well as stability on CWL (central wavelength).  No deviation from temperature change.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConstant stringent quality testing processes - Each filter is tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptolong will spare no effort to serve our customer with outstanding quality products and best service!\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cbr\u003e\n\u003cul\u003e\u003c\/ul\u003e\nCWL(center of wavelength): \u003cspan\u003eSII 671.6nm\u003c\/span\u003e\u003cbr\u003eFWHM: \u003cspan\u003eSII 6.5nm\u003c\/span\u003e\u003cbr\u003eTpeak: \u0026lt;85%\u003cbr\u003eOptical Density: OD 3\u003cbr\u003eSurface Quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism(arc sec): 30s","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":30271896191056,"sku":"Optolong-S-II-6.5nm-1.25\"","price":203.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":30271896256592,"sku":"Optolong-S-II-6.5nm-31mm","price":246.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":30271896289360,"sku":"Optolong-S-II-6.5nm-36mm","price":253.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":30271896223824,"sku":"Optolong-S-II-6.5nm-2\"","price":318.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-optolong-sulphur-ii-6-5nm-filter-12786566299728.jpg?v=1668533744"},{"product_id":"zwo-duo-band-filter","title":"ZWO Duo Band Filter","description":"\u003cp\u003e\u003cspan\u003eZWO Duo Band Filters are dual narrowband filters primarily aimed at complementing the range of one-shot colour cameras including ZWO's ASI cameras. They're perfect for the astronomer who may already own a One Shot Colour (OSC) camera and wants to image using narrowband techniques on emission objects without purchasing a mono camera, filter wheel and narrowband filter set.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe dual band-pass nature of the Duo Band filter passes light at Hα (656 nm) and OIII (500 nm) wavelengths, and can greatly reduce the interference from natural light sources such as moonlight or artificial light pollution such as street lighting.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eContrast and visibility of deep sky objects such as emission nebulae is improved.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eIf you're looking for an economical solution to deep sky photography in light polluted areas ($139 for 1.25\" and $249 for 2\"), the ZWO Duo Band Filters are a great choice.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe 1.85 mm Duo-Band filter can be used with most cameras and filter wheels, including ASI cameras and EFW Electronic Filter Wheels, and comes in 1.25\" and 2\" sizes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-Filter_336c9f19-8ca5-4832-984e-38c2ec6f3807.png?v=1765075043\"\u003e\u003cimg class=\"aligncenter size-full wp-image-16690\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-Filter_336c9f19-8ca5-4832-984e-38c2ec6f3807.png?v=1765075043\" alt=\"ZWO-Duo-Band-Filter\" width=\"775\" height=\"605\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Parameters\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eSizes: Standard 1.25\" \u0026amp; 2\"\u003c\/p\u003e\n\u003cp\u003eThickness: 1.85 mm\u003c\/p\u003e\n\u003cp\u003eBandwidth: HA (15 nm) OIII (35 nm)\u003c\/p\u003e\n\u003cp\u003eSurface quality: 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003eSchott substrate material\u003c\/p\u003e\n\u003cp\u003eMore than 90% transmission at major OIII line 486 nm, 496 nm and 501 nm\u003c\/p\u003e\n\u003cp\u003eMore than 80% transmission at Ha line 656.3 nm\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-filter-2_44094d73-0f90-493b-997e-c758bfb5025b.png?v=1765075046\"\u003e\u003cimg class=\"aligncenter size-full wp-image-16689\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-filter-2_44094d73-0f90-493b-997e-c758bfb5025b.png?v=1765075046\" alt=\"ZWO-Duo-Band-filter (2)\" width=\"769\" height=\"340\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eAircraft grade aluminum with precise CNC machining\u003c\/p\u003e\n\u003cp\u003eFine sandblasting processing and anodized finish\u003c\/p\u003e\n\u003cp\u003eExtinction treatment to prevent reflection\u003c\/p\u003e\n\u003cp\u003eLaser engraving font that will never fade\u003c\/p\u003e\n\u003cp\u003ePrecise double-sided optical coating\u003c\/p\u003e\n\u003cp\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-filter-1.25.jpg?v=1765075050\"\u003e\u003cimg class=\"aligncenter size-large wp-image-16691\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-filter-1.25-1024x514.jpg?v=1765075032\" alt=\"ZWO-Duo-Band-filter-1.25''\" width=\"1024\" height=\"514\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-filter-2.jpg?v=1765075053\"\u003e\u003cimg class=\"aligncenter size-large wp-image-16692\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ZWO-Duo-Band-filter-2-1024x514.jpg?v=1765075036\" alt=\"ZWO-Duo-Band-filter-2''\" width=\"1024\" height=\"514\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eNote on Wide Angle Applications\u003c\/h2\u003e\n\u003cp\u003eThe incoming light transmitted through the filter should be perpendicular to the filter, or the incident angle should be less than 8°. Therefore, this product is not suitable for wide-angle or ultra wide-angle lenses.\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/5_04b8eb5b-2918-4220-8543-7dcb9e606aab.png?v=1765075057\"\u003e\u003cbr\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/incident-light-to-the-filter_ef23945a-9cb7-4487-9add-61dd52e585f4.png?v=1765075061\"\u003e\u003cimg class=\"aligncenter size-full wp-image-16682\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/incident-light-to-the-filter_ef23945a-9cb7-4487-9add-61dd52e585f4.png?v=1765075061\" alt=\"incident-light-to-the-filter\" width=\"645\" height=\"274\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\"","offer_id":30725263917136,"sku":"ZWO DB1.25","price":139.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":30725263949904,"sku":"ZWO DB2","price":239.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-zwo-duo-band-filter-13104598941776.png?v=1736013984"},{"product_id":"astronomik-mc-clear-glass-filter-for-eos-dslr-full-spectrum-modification","title":"Astronomik MC-Clear Glass Filter for EOS DSLR Full-Spectrum-Modification","description":"\u003cp\u003e\u003cstrong\u003eSpecial glass for the retrofitting of Canon® EOS DSLR cameras in order to achieve the full spectral sensitivity of the CMOS sensor.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Astronomik MC clear glass is a precision optically polished and multi-coated special glass. The glass is available in different sizes according to the requirements of the various Canon ® EOS DSLR cameras.\u003c\/p\u003e\n\u003cp\u003eMC glass is mainly used to compensate the optical path of the removed original filter of the camera. Furthermore, it prevents dust from falling directly on the sensor, which may cause image defects.\u003c\/p\u003e\n\u003cp\u003eThe MC has no filter effect. It is blocking neither infrared nor ultraviolet light. The transmission is typically higher than 99.7%.\u003c\/p\u003e\n \u003cbr\u003e\n\u003cp\u003eThe retrofitted DSLR Camera needs for proper imaging with camera lenses, light refracting elements such as flat field lenses or focal reducers, an additional filter in the beam path that blocked the infrared or visible spectrum of light, depending on the desired spectral range. For everyday photography, we recommend an Astronomik OWB-Clip filter that is snapped directly and without any tools into the camera body. The sensitivity and the white balance of the camera is being restored to its original state.\u003c\/p\u003e\n\u003cp\u003eFor astrophotography in the visible light we recommend at least an L-filter in the beam path. For IR photography Astronomik offers EOS Pro 742 or 807 IR pass Clip filters.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Canon EOS 1100D-2000D, M3, M5","offer_id":32150304030800,"sku":"8h00jj","price":94.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS 6D, 5Ds","offer_id":32150304063568,"sku":"8h00ma","price":108.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS 1000D, 450D-800D, 40D-200D, 7D, M","offer_id":32150304096336,"sku":"8h00ep","price":94.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS 350D, 20D, 20Da, 30D","offer_id":32150304129104,"sku":"8h00dh","price":80.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS 5D Mk2, 5D Mk3","offer_id":32150397648976,"sku":"8h00jc","price":108.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm Unmounted","offer_id":46396965716187,"sku":"8h00hx","price":130.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/astronomik-filter-astronomik-mc-clear-glass-filter-for-eos-dslr-full-spectrum-modification-14772768964688.jpg?v=1736371963"},{"product_id":"zwo-5-position-2-mini-electronic-filter-wheel","title":"ZWO 5 Position 2\"\/50mm Electronic Filter Wheel - ZWO-EFW-5X2","description":"\u003cp data-mce-fragment=\"1\"\u003eZWO EFW (5 x 2″or 7 x 2″)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eProduct weight: EFW 5 x 2″=500g \/ EFW 7 x 2″=650g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003ePower supply：USB2.0\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eControl Mode： ASCOM and SDK\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDriver: Not required\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-1_459b6259-939b-4a19-b21f-051a087cbd4a.jpg?v=1765070470\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-full wp-image-18081\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-1_459b6259-939b-4a19-b21f-051a087cbd4a.jpg?v=1765070470\" alt=\"EFW2-1\" width=\"800\" height=\"800\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe filter wheel body is CNC milled from an aircraft graded aluminum block.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eExcellent craftsmanship, very thin and light with only 20mm thickness.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe core part of our EFW is the stepper motor which has reliable performance and quality that comes from NPM, Japan.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWe have two specifications for EFW2\":\u003cbr data-mce-fragment=\"1\"\u003eTYPE1: EFW5X2\"\u003cbr data-mce-fragment=\"1\"\u003eTYPE2: EFW7X2\"\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e  2″ Thread-In Filters or\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e50.4mm ±0.5mm Unmounted Filters can be used \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe 2\" Electronic Filter Wheel can be rotated in both counter clockwise and clockwise direction for filter selection.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-2_49e7047f-9b60-43c9-a7aa-f3d3e498f3a0.jpg?v=1765070474\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone wp-image-18091\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-2_49e7047f-9b60-43c9-a7aa-f3d3e498f3a0.jpg?v=1765070474\" alt=\"EFW2-2\" width=\"596\" height=\"596\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-3_f334000f-364f-4a1c-b077-2e3b77c2291d.jpg?v=1765070477\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone wp-image-18092\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-3_f334000f-364f-4a1c-b077-2e3b77c2291d.jpg?v=1765070477\" alt=\"EFW2-3\" width=\"561\" height=\"561\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThere is no need of multiple cables to power this wheel up, just one USB cable does the trick.The maximum power supply of this EFW is approximately 120mAh @ 5V, which can be operated from the Cooled CCD's USB2.0 port.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWhen connected to ASI6200, the distance from the filter to the sensor is about 18mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOur 2″ RGBL filters are recommended to work with ASI6200MM Pro camera, it will offer nearly 1:1:1 RGB color balance.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBelow requirements must be met while using the 2\" filter from third-party.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg class=\"aligncenter size-large wp-image-26486\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Requirements-for-2inch-filter-from-third-party-1024x644.jpg?v=1765070453\" alt=\"Requirements for 2inch filter from third party\" width=\"1024\" height=\"644\" data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFilters (not including the threads) must be less than 7.5mm in thickness and less than 50.8mm in diameter. Threads must be less than 2.7mm in thickness.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWhat's in the box?\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e1. EFW2*5 or FW2*7 body\u003cbr data-mce-fragment=\"1\"\u003e2. USB2.0 – 2m cable\u003cbr data-mce-fragment=\"1\"\u003e3. A bag of M2.5*6 screws (6pcs\/ bag)\u003cbr data-mce-fragment=\"1\"\u003e4. A bag of filter masks for 50mm filters (7pcs\/ bag)\u003cbr data-mce-fragment=\"1\"\u003e5. Phillips screwdriver\u003cbr data-mce-fragment=\"1\"\u003e6. A bag of M2*4 flat screws (23pcs\/ bag)\u003cbr data-mce-fragment=\"1\"\u003e7. M54M-M48F adapter\u003cbr data-mce-fragment=\"1\"\u003e8. M54M-M42F adapter\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/5_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891.jpg?v=1765070481\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-large wp-image-21221\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/5_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891-1024x328.jpg?v=1765070456\" alt=\"5孔EFW配件（英文）(1)\" width=\"1024\" height=\"328\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/7_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891.jpg?v=1765070484\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-large wp-image-21222\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/7_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891-1024x328.jpg?v=1765070460\" alt=\"7孔EFW配件（英文）(1)\" width=\"1024\" height=\"328\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eMechanical drawing\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X5-Mechanical-drawing1.jpg?v=1765070488\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-large wp-image-18251\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X5-Mechanical-drawing1-923x1024.jpg?v=1765070463\" alt=\"EFW2X5-Mechanical drawing(1)\" width=\"923\" height=\"1024\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X7-Mechanical-drawing1.jpg?v=1765070491\" data-mce-fragment=\"1\"\u003e\u003cimg class=\"alignnone size-large wp-image-18253\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X7-Mechanical-drawing1-870x1024.jpg?v=1765070467\" alt=\"EFW2X7-Mechanical drawing(1)\" width=\"870\" height=\"1024\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eUsage guider:\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e5 connection methods of ASI6200 to get 55mm back focus length:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/tutorials\/5-connection-methods-to-get-55mm-back-focus-length.html\" data-mce-fragment=\"1\"\u003ehttps:\/\/astronomy-imaging-camera.com\/tutorials\/5-connection-methods-to-get-55mm-back-focus-length.html\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":32170973921360,"sku":"ZWO EFW-5X2","price":416.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-wheel-zwo-5-position-2-50mm-electronic-filter-wheel-zwo-efw-5x2-14801669455952.jpg?v=1736013969"},{"product_id":"zwo-7-position-2-mini-electronic-filter-wheel","title":"ZWO 7 Position 2\"\/50mm Electronic Filter Wheel - ZWO-EFW-7X2","description":"\u003cp\u003eZWO EFW (5 x 2″or 7 x 2″)\u003c\/p\u003e\n\u003cp\u003eProduct weight：EFW 5 x 2″=500g \/ EFW 7 x 2″=650g\u003c\/p\u003e\n\u003cp\u003ePower supply：USB2.0\u003c\/p\u003e\n\u003cp\u003eControl Mode： ASCOM and SDK\u003c\/p\u003e\n\u003cp\u003eDriver：Free of driver\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-1_f47d0fa1-6ab5-479f-91cc-f9c1437bfd33.jpg?v=1765070524\"\u003e\u003cimg height=\"800\" width=\"800\" alt=\"EFW2-1\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-1_f47d0fa1-6ab5-479f-91cc-f9c1437bfd33.jpg?v=1765070524\" class=\"alignnone size-full wp-image-18081\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter wheel body is CNC milled from an aircraft graded aluminum block.\u003c\/p\u003e\n\u003cp\u003eExcellent craftsmanship, very thin and light with only 20mm thickness.\u003c\/p\u003e\n\u003cp\u003eThe core part of our EFW is the stepper motor which has reliable performance and quality that comes from NPM, Japan.\u003c\/p\u003e\n\u003cp\u003eWe have two specifications for EFW2\":\u003cbr\u003eTYPE1: EFW5X2\"\u003cbr\u003eTYPE2: EFW7X2\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e  2″ Thread-In Filters or\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e50.4mm ±0.5mm Unmounted Filters can be used \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 2\" Electronic Filter Wheel can be rotated in both counter clockwise and clockwise direction for filter selection.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-2_b81c777b-5a40-414b-b89b-0b9e11f20494.jpg?v=1765070527\"\u003e\u003cimg height=\"596\" width=\"596\" alt=\"EFW2-2\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-2_b81c777b-5a40-414b-b89b-0b9e11f20494.jpg?v=1765070527\" class=\"alignnone wp-image-18091\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-3_1e74320b-1586-44ea-9636-e92b32cb9f70.jpg?v=1765070531\"\u003e\u003cimg height=\"561\" width=\"561\" alt=\"EFW2-3\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2-3_1e74320b-1586-44ea-9636-e92b32cb9f70.jpg?v=1765070531\" class=\"alignnone wp-image-18092\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThere is no need of multiple cables to power this wheel up, just one USB cable does the trick.The maximum power supply of this EFW is approximately 120mAh @ 5V, which can be operated from the Cooled CCD's USB2.0 port.\u003c\/p\u003e\n\u003cp\u003eWhen connected to ASI6200, the distance from the filter to the sensor is about 18mm\u003c\/p\u003e\n\u003cp\u003eOur 2″ RGBL filters are recommended to work with ASI6200MM Pro camera, it will offer nearly 1:1:1 RGB color balance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBelow requirements must be met while using the 2\" filter from third-party.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"644\" width=\"1024\" alt=\"Requirements for 2inch filter from third party\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Requirements-for-2inch-filter-from-third-party-1024x644_01f0bfd6-07e9-48f2-a5ae-9d3461d98b6e.jpg?v=1765070506\" class=\"aligncenter size-large wp-image-26486\"\u003e\u003c\/p\u003e\n\u003cp\u003eFilters (not including the threads) must be less than 7.5mm in thickness and less than 50.8mm in diameter. Threads must be less than 2.7mm in thickness.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWhat's in the box?\u003c\/h3\u003e\n\u003cp\u003e1. EFW2*5 or FW2*7 body\u003cbr\u003e2. USB2.0 – 2m cable\u003cbr\u003e3. A bag of M2.5*6 screws (6pcs\/ bag)\u003cbr\u003e4. A bag of filter masks for 50mm filters (7pcs\/ bag)\u003cbr\u003e5. Phillips screwdriver\u003cbr\u003e6. A bag of M2*4 flat screws (23pcs\/ bag)\u003cbr\u003e7. M54M-M48F adapter\u003cbr\u003e8. M54M-M42F adapter\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/5_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891_939bd9f9-8d43-4d51-b0f3-e92607a42903.jpg?v=1765070534\"\u003e\u003cimg height=\"328\" width=\"1024\" alt=\"5孔EFW配件（英文）(1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/5_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891-1024x328_e6eebe6d-2ba9-4f43-9be6-0b99d80b9d60.jpg?v=1765070510\" class=\"alignnone size-large wp-image-21221\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/7_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891_99ebdd82-57b1-477f-a826-2329008fbe07.jpg?v=1765070538\"\u003e\u003cimg height=\"328\" width=\"1024\" alt=\"7孔EFW配件（英文）(1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/7_E5_AD_94EFW_E9_85_8D_E4_BB_B6_EF_BC_88_E8_8B_B1_E6_96_87_EF_BC_891-1024x328_9bfb38cc-2cb2-488c-a5ca-f66f66971a05.jpg?v=1765070513\" class=\"alignnone size-large wp-image-21222\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eMechanical drawing\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X5-Mechanical-drawing1_10c0d735-c573-481e-b5c4-cb6d5677c8c4.jpg?v=1765070541\"\u003e\u003cimg height=\"1024\" width=\"923\" alt=\"EFW2X5-Mechanical drawing(1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X5-Mechanical-drawing1-923x1024_e0a1bd3a-7cf7-47f0-a045-c2cedd5f28b7.jpg?v=1765070517\" class=\"alignnone size-large wp-image-18251\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X7-Mechanical-drawing1_e00df8a3-b7c0-44f9-a47a-1243c8eb8cc1.jpg?v=1765070545\"\u003e\u003cimg height=\"1024\" width=\"870\" alt=\"EFW2X7-Mechanical drawing(1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/EFW2X7-Mechanical-drawing1-870x1024_5c6a12f5-e5d3-419b-845a-32c42ca740df.jpg?v=1765070520\" class=\"alignnone size-large wp-image-18253\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eUsage guider:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e5 connection methods of ASI6200 to get 55mm back focus length:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/tutorials\/5-connection-methods-to-get-55mm-back-focus-length.html\"\u003ehttps:\/\/astronomy-imaging-camera.com\/tutorials\/5-connection-methods-to-get-55mm-back-focus-length.html\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":32171078025296,"sku":"ZWO EFW-7x2","price":555.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-wheel-zwo-7-position-2-50mm-electronic-filter-wheel-zwo-efw-7x2-14801785847888.jpg?v=1736013967"},{"product_id":"zwo-uv-ir-cut-filter","title":"ZWO UV IR CUT filter","description":"\u003cp\u003eZWO UV IR-cut filters are suitable for color camera with an AR protect window.\u003c\/p\u003e\n\u003cp\u003eThe ZWO UV IR-Cut Filter blocks infrared light from reaching the sensor of your CCD or CMOS camera or your expensive H-alpha filter. When imaging, the addition of this simple and inexpensive accessory will result in sharper images, and when doing solar work, the IR Cut Filter will your protect H-alpha filter from the damaging effects of infrared radiation.\u003c\/p\u003e\n\u003cp\u003eInfrared or IR light is invisible to the human eye, and so even though most telescopes are not designed to focus IR light, it does not matter when you are using your telescope visually. However, when you add a camera to the mix, its a whole other story! Unlike the human eye, a silicon sensor is very sensitive to light in the infrared portion of the spectrum, and that is a problem because infrared images are blurry as all get out. That means your nice, sharp visual light image is degraded by the addition of the infrared layer. This problem can easily be solved by blocking the infrared, and the ZWO IR-Cut filter will do just that. The filter comes with a protective plastic case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note that the box is marked \"ZWO IR Cut Filter\" but the filters do cut UV as well as per the spectrum chart.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cp\u003eName: IR-cut filter\u003c\/p\u003e\n\u003cp\u003eSize: 2″, 1.25\"\u003c\/p\u003e\n\u003cp\u003eThickness: 5mm+2mm(Thread)\u003c\/p\u003e\n\u003cp\u003eThread: M48*0.75 male thread\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\"","offer_id":32419573956688,"sku":"ZWO IRCUT1.25","price":40.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32247843684432,"sku":"ZWO IRCUT2","price":69.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-zwo-uv-ir-cut-filter-14909896130640.png?v=1736013965"},{"product_id":"astronomik-l-3-uv-ir-block","title":"Astronomik UV-IR Block Filters","description":"\u003cp\u003eAstronomik now offers you a range of three different UV+IR blockers as Luminance filters. The different spectral window of each new Luminance filters is designed to tune your setup to get the sharpest image from any optical design and any camera.\u003cstrong\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003eThe Luminance channel is probably the most important for a great final image! You want as much signal as possible so the filter should have the highest transmission possible with a wide spectral Band-pass. This combination provides the greatest sensitivity and gives you the highest photon counts on your pixels. While the high transmission level is a great aspect of the new Astronomik Luminance filters, not all optical instruments or additional optical elements like correctors, field-flatteners or reducers, have perfect colour correction so it can be the width of the spectral band pass of  the Luminance filter that can cause problems. A band pass that is too wide will allow the transmission of incompletely focused light (Chromatic aberration), making stars appear soft or bloated. In such cases image processing can become difficult, so having a slightly narrowed spectral window in your Luminance filter can reduce or eliminate this damaging effect.\u003c\/p\u003e\n\u003cdiv class=\"ic_wrapper ic_myCarousel\" id=\"ic_63597013_wrapper\"\u003e\n\u003cdiv class=\"infiniteCarousel ic_peek_padding\" id=\"ic_63597013\"\u003e\n\u003cdiv class=\"ic_tray\"\u003e\n\u003cdiv class=\"infiniteCarousel_item\" id=\"ic_63597013_2\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"infiniteCarousel_item\" id=\"ic_63597013_3\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"infiniteCarousel_item\" id=\"ic_63597013_4\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"infiniteCarousel_item\" id=\"ic_63597013_5\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"infiniteCarousel_item\" id=\"ic_63597013_0\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"infiniteCarousel_item\" id=\"ic_63597013_1\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ic_left_nav\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ic_right_nav\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ic_controls\" id=\"ic_controls_63597013\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ccanvas height=\"30\" id=\"ic_canvas_63597013\" width=\"30\"\u003e\u003c\/canvas\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ic_thumbnail_tray\" id=\"ic_63597013_thumbnail_tray\"\u003e\n\u003cdiv class=\"ic_thumbnails\"\u003e\n\u003cdiv class=\"ic_button ic_active\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ic_button\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ic_button\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003eTo give you all the tools to gather the best data possible\u003cspan\u003e \u003cstrong\u003eAstronomik\u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e has expanded their line of Luminance filters\u003c\/strong\u003e: Now you can select a Luminance filter perfectly matched to the kind of telescope you use, to get the highest signal and sharpest image for the Luminance channel!\u003cbr\u003eDepending on the color correction of your scope you may use a wider spectral window for the Luminance data. The L1 filter has the widest spectral window, the L2 is about the same as our current L-Filter and the L3 is much narrower.\u003cbr\u003eIf you use an optical system that is completely free of any chromatic aberration you should get an L1 filter for your setup. For general use the L2 filter is well suited to most optical systems with a corrector, flattener or reducer in the optical train while the L3 filter is designed for users of refractors with a less-than-perfect color correction and in combination with the new Deep-Sky RGB filters, the L3 filter will minimize the problem of bluish halos around stars.\u003cbr\u003e\u003cbr\u003eThe transmission curve characteristics and coatings on the new Luminance filters have been designed and engineered in such a way that no halos or reflections will be visible. Even with bright stars in the field of view you will be able to reveal the faintest structures in nebulae or galaxies.\u003cbr\u003e\u003cbr\u003eLike all Astronomik Filters, the new Luminance filters are made using an extremely durable and scratch resistant coating, deposited on the finest polished optical substrate, which is free of any striae or internal strains. All substrates are made to exactly the same thickness, so all of our filters are Par focal.\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eAdditional note for observers working under light polluted skies:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eIf your observing site suffers from light pollution you should try to use our CLS-CCD as a replacement for the Luminance filter. The transmission curve of the CLS-CCD will give you approximately the same amount of energy in all three colour channels while blocking nearly all unwanted artificial light pollution. Customers who replaced the Lx filter with the CLS-CCD are amazed by the increased quality of their data. This small change gives you the opportunity to take much deeper images from your current observing site.\u003c\/p\u003e\n\u003ch4\u003eSizes Available From Astronomik - Please ask us if we don't have a price listed for the one you would like\u003c\/h4\u003e\n\u003cp\u003e1.25\" (M28.5)\u003cbr\u003e2\" (M48)\u003cbr\u003eT-thread cell (M42x0.75)\u003cbr\u003eSC-cell (2\" \/ 24TPI)\u003cbr\u003eØ27mm\u003cbr\u003eØ31mm\u003cbr\u003eØ36mm\u003cbr\u003eØ42mm\u003cbr\u003eØ50mm\u003cbr\u003e50x50mm\u003cbr\u003eEOS APS-C Clip-Filter\u003cbr\u003eEOS M Clip-Filter\u003cbr\u003eEOS XL Clip-Filter\u003cbr\u003eSony alpha Clip-Filter\u003cbr\u003eM52\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"L3 1.25\"","offer_id":39615360204982,"sku":"8h00pb","price":108.0,"currency_code":"CAD","in_stock":true},{"title":"L3 31mm, Protective Ring\/Unthreaded","offer_id":39615348965558,"sku":"8h00px","price":121.0,"currency_code":"CAD","in_stock":true},{"title":"L3 36mm, Protective Ring\/Unthreaded","offer_id":39615350145206,"sku":"8h00qi","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"L3 2\"","offer_id":32261135302736,"sku":"8h00pm","price":203.0,"currency_code":"CAD","in_stock":true},{"title":"L3 M52","offer_id":32263274987600,"sku":"8h00v6","price":217.0,"currency_code":"CAD","in_stock":true},{"title":"L2 1.25\"","offer_id":32296369750096,"sku":"8h00pa","price":102.0,"currency_code":"CAD","in_stock":true},{"title":"L2 31mm, Protective Ring\/Unthreaded","offer_id":32296363819088,"sku":"8h00pw","price":116.0,"currency_code":"CAD","in_stock":true},{"title":"L2 36mm, Protective Ring\/Unthreaded","offer_id":39615363023030,"sku":"8h00qh","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"L2 2\"","offer_id":39615366463670,"sku":"8h00pl","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"L2 T2","offer_id":32296366112848,"sku":"8h00ro","price":162.0,"currency_code":"CAD","in_stock":true},{"title":"L2 EOS APS-C","offer_id":39356095791286,"sku":"8h00sk","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"L2 EOS M","offer_id":39356123676854,"sku":"8h00t4","price":176.0,"currency_code":"CAD","in_stock":true},{"title":"L2 EOS R XL","offer_id":39356089827510,"sku":"8h11gf","price":203.0,"currency_code":"CAD","in_stock":true},{"title":"L2 EOS XL","offer_id":39356092809398,"sku":"8h00sv","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"L2 EOS XT APS-C","offer_id":39356099756214,"sku":"8h00mw","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"L1 1.25\"","offer_id":45754440188123,"sku":"8h00oz","price":108.0,"currency_code":"CAD","in_stock":true},{"title":"L1 2\"","offer_id":45754438844635,"sku":"8h00pk","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"L1 50mm","offer_id":44075710218459,"sku":"8h00qr","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"L1 EOS APS-C","offer_id":45754441433307,"sku":"8h00sj","price":135.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/astronomik-filter-l3-2-astronomik-uv-ir-block-filters-14936280924240.jpg?v=1736365655"},{"product_id":"2-additional-filter-drawers-for-the-telescope-filter-drawer-system","title":"Additional Filter Drawers for the Telescope Filter Drawer System","description":"\u003cp\u003eAdditional drawer for the \u003ca href=\"https:\/\/telescopescanada.ca\/collections\/top-sellers\/products\/2-telescope-filter-drawer-system-with-2-drawers?_pos=1\u0026amp;_sid=d47e68c22\u0026amp;_ss=r\u0026amp;variant=29091833315408\"\u003eTelescope Filter Drawer System\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Telescopes Canada","offers":[{"title":"1.25\"","offer_id":32262223495248,"sku":"1.25\" EXTRA FILTER DRAWER","price":31.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":32262223528016,"sku":"36mm EXTRA FILTER DRAWER","price":44.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32262223462480,"sku":"2\" EXTRA FILTER DRAWER","price":31.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/telescopes-canada-accessory-additional-filter-drawers-for-the-telescope-filter-drawer-system-14938503839824.png?v=1668469851"},{"product_id":"optolong-cls-light-pollution-filter","title":"Optolong CLS CCD Light Pollution Filter","description":"\u003cp\u003eThe Optolong CLS-CCD broadband filter is designed to improve the visibility of various deep-sky objects by selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow). The filter is highly transparent in the main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm). It's suitable for enhancing the contrast and details in light-polluted areas.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eCLS-CCD is different from the CLS filter (which is recommended for visual use), with an infrared wavelength 700-1100nm cut-off. It's fit for color CCD cameras and modified DSLRs for astrophotography.\u003c\/p\u003e\n\u003cp\u003eIt works well on most emission nebulae, planetary nebulae and supernova remnants.\u003c\/p\u003e\n\u003cp\u003eYou will see a noticeable boost in contrast and visibility of the fainter outer nebulae detail. \u003c\/p\u003e\n\u003cp\u003eNote that light pollution filters do not eliminate the effects of light pollution or increase the object's brightness. In many cases they instead increase the contrast between nebula and night sky.\u003c\/p\u003e\n\u003cp\u003eWARNING: This filter is not designed for sun observation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e2. CLS-CCD Spectrum for Reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003eHow to read the chart?\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲The\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRED\u003c\/strong\u003e\u003c\/span\u003e line shows the transmission of the filter. The artificial emission lines are shown in \u003cspan\u003e\u003cstrong\u003eORANGE \u003c\/strong\u003ea\u003c\/span\u003end the emission lines from imaging and observation targets are shown in \u003cstrong\u003e\u003cspan\u003eGREEN\u003c\/span\u003e.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":32262450282576,"sku":"OPTOLONG-CLS-CCD-1.25","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"31mm (Unmounted)","offer_id":32579563290704,"sku":"OPTOLONG-CLS-CCD-31mm","price":145.0,"currency_code":"CAD","in_stock":false},{"title":"36mm (Unmounted)","offer_id":32417008123984,"sku":"OPTOLONG-CLS-CCD-36mm","price":149.0,"currency_code":"CAD","in_stock":false},{"title":"2\"","offer_id":32262450315344,"sku":"OPTOLONG-CLS-CCD-2","price":226.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-C","offer_id":32262450446416,"sku":"OPTOLONG-CLS-CCD-EOS-C","price":172.0,"currency_code":"CAD","in_stock":true},{"title":"Canon EOS-FF","offer_id":32579544318032,"sku":"OPTOLONG-CLS-CCD-EOS-FF","price":172.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-optolong-cls-ccd-light-pollution-filter-14939274117200.jpg?v=1668535007"},{"product_id":"optolong-h-beta-filter","title":"Optolong Hydrogen-Beta 12nm Narrowband Filter","description":"\u003cp\u003e\u003cspan\u003eThe Optolong H-beta filter is designed for nebula observation, with a 12nm bandwidth centered on a wavelength of 486nm (the frequency of Hydrogen-Beta emissions).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter is best suited to a large aperture telescope under clear and dark viewing conditions with good seeing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for viewing nebulae such as the Horsehead Nebula and California Nebula.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eH-Beta Spectrum\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers (nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The \u003cstrong\u003eWHITE\u003c\/strong\u003e line shows the transmission of the filter. Artificial light emission lines (light pollution) are shown in \u003cstrong\u003eORANGE \u003c\/strong\u003eand the emission lines from H-alpha, H-Beta and O-III in nebulae are shown in \u003cstrong\u003eGREEN.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":32297466495056,"sku":"Optolong H-Beta 1.25\"","price":126.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32297466462288,"sku":"Optolong H-Beta 2\"","price":197.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-2-optolong-hydrogen-beta-12nm-narrowband-filter-15012019404880.jpg?v=1668534826"},{"product_id":"optolong-ir-pass-685nm-filter","title":"Optolong IR Pass 685nm Filter","description":"\u003cspan\u003eThe Optolong IR Pass 685nm filter is used to block wavelengths below 670nm and is designed for IR-LRGB imaging in order to produce a sharper luminance image for the best planetary contrast.  This is because atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eCCD and CMOS sensors are capable of detecting light in the 350-1100nm range including infrared wavelengths.  Taking RGB planetary images with IR as the luminance channel will have improved contrast and better surface detail than LRGB images.\u003c\/span\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":32297519186000,"sku":"Optolong IR Pass 685nm 1.25\"","price":112.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32297519153232,"sku":"Optolong IR Pass 685nm 2\"","price":163.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-optolong-ir-pass-685nm-filter-15012333355088.jpg?v=1668534820"},{"product_id":"optolong-uv-ir-cut-filter","title":"Optolong UV IR Cut Filter","description":"\u003cp\u003e\u003cspan\u003eThe Optolong UV IR Cut Filter effectively blocks infrared and ultraviolet frequencies, resulting in the elimination of\u003c\/span\u003e\u003cspan\u003e violet halos around stars and crisper focus with better contrast when used as a luminance filter for planets and the moon.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter also reflects heat and acts as an inexpensive dust cover for the more expensive components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":32297584656464,"sku":"Optolong UV IR Cut Filter 1.25\"","price":62.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":42467053600987,"sku":"Optolong UV IR Cut Filter 31mm","price":64.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":42467053699291,"sku":"Optolong UV IR Cut Filter 36mm","price":78.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32297584623696,"sku":"Optolong UV IR Cut Filter 2\"","price":92.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-2-optolong-uv-ir-cut-filter-15012398432336.png?v=1668533567"},{"product_id":"optolong-l-extreme-7nm-dual-narrowband-filter-h-alpha-and-o-iii","title":"Optolong L-eXtreme 7nm Dual Narrowband Filter (H-Alpha and O-III)","description":"\u003ch4\u003eIf you'd like maximum light pollution management while using a one-shot colour camera to image H-Alpha and O-III emission targets, the Optolong L-eXtreme is the best filter for the job.\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe L-eXtreme is a 7nm dual band-pass filter which can be used with one-shot color cameras like DSLRs and CCD\/CMOS astrophotography cameras. It's most suited for fast systems or long exposures. The convenience and cost effectiveness of this filter allows amateurs to image emission nebulae even in bright, light-polluted or moonlit skies.\u003cbr\u003e\u003cbr\u003eThe L-eXtreme isolates the H-Alpha and Oxygen III emission lines so that the contrast and signal-to-noise ratio of a nebulae are maximized. For people who are imaging in very light polluted areas or when the moon is out, the L-eXtreme is an excellent choice.\u003cbr\u003e\u003cbr\u003eThe advantage of the L-eXtreme filter is that there is no light transmission between the H-beta and OIII lines (as there are no nebula emission lines there). This reduction in light pollution maximizes the nebula's signal and makes the sky background darker while imaging.\u003cbr\u003e\u003cbr\u003eUnlike the L-eNhance filter, which is a tri-band filter (it transmits H-Alpha, H-Beta, and O-III), the L-eXtreme filter is dual-band, passing just the H-Alpha and O-III emission lines in order to deliver improved light pollution rejection.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #2b00ff;\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: The Optolong L-eXtreme filters (apart from the threaded both sides version) have threads on one side to keep them very thin - 1.85mm not including the threads - they can be used with \u003ca href=\"https:\/\/telescopescanada.ca\/collections\/filter-wheels\" style=\"color: #2b00ff;\"\u003eFilter Wheels\u003c\/a\u003e, \u003ca href=\"https:\/\/telescopescanada.ca\/products\/2-telescope-filter-drawer-system-with-2-drawers?variant=29091833315408\" style=\"color: #2b00ff;\"\u003eFilter Drawer System\u003c\/a\u003e, focusers with a place to thread focal reducers internally (such as some Moonlite focusers) and camera nose pieces that fit into compression rings, but the 1.85mm filter should not be threaded into the imaging train like an adapter ring with threads on both sides. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #2b00ff;\"\u003eThe threaded both sides version however can be used like an adapter ring and can be threaded directly into your optical train without any additional equipment required. The threaded both sides version has a thickness of 7.6mm not including the threads.  \u003cstrong\u003eNote that this size filter will NOT fit in most filter wheels or drawers.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003eNote: For imaging galaxies and reflection nebulae, the Optolong L-Pro filter is more appropriate as the L-eXtreme and L-eNhance filters will reject much of the light from those broadband or reflection objects.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eManufacturing Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHigh-precision grinding and polishing to make sure the substrate parallelism is greater than 30\" and the surface accuracy is better than λ\/4 ;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePurified water ultrasonic cleaning is aim to effectively remove impurities and dust from the substrate surface.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change; IAD not only consolidates membrane compactness, increases film firmness, but also changes vacuum coating material characteristics.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlanetary rotation system offers precision and a homogeneous coating ensuring high value on transmission of pass-band and Optical density of off-band;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNon-cementing optical substrate coating;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuality Control: each filters is examined by Spectrophotometer for spectrum characteristic, and Laser Interferometer for surface accuracy.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cstrong\u003ePacking\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: cardboard sleeve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eInner Plastic Box: Strong PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: Imported high pressure white EVA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cp\u003e\u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSubstrate: B270\u003cbr\u003eThickness: 1.85mm\u003cbr\u003eFWHM:  O3 7nm+Ha 7nm\u003cbr\u003eBlocking range: 300-1000nm\u003cbr\u003eBlocking depth: light pollution line blocking \u0026gt;99%\u003cbr\u003eSurface quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism: 30s\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":32334135033936,"sku":"Optolong L-eXtreme 1.25\"","price":339.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32334135001168,"sku":"Optolong L-eXtreme 2\"","price":439.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" THREADED BOTH SIDES (7.7mm CASING)","offer_id":32334135099472,"sku":"Optolong L-eXtreme 1.25\" Dual Threaded","price":339.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/optolong-filter-2-optolong-l-extreme-7nm-dual-narrowband-filter-h-alpha-and-o-iii-15083205394512.jpg?v=1668534640"},{"product_id":"zwo-7nm-h-alpha-filter","title":"ZWO 7nm H-Alpha Narrowband Filter","description":"\u003cp\u003eNarrowband filter does not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eIt can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow).\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eForm 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Parameter:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eName: ZWO New narrowband 2″ filter\u003c\/p\u003e\n\u003cp\u003eSize: 2″\u003c\/p\u003e\n\u003cp\u003eThickness: 5mm+2.5mm(thread)\u003c\/p\u003e\n\u003cp\u003eGlass thickness: 1.85mm\u003c\/p\u003e\n\u003cp\u003eThread: M48*0.75 male thread\u003c\/p\u003e\n\u003cp\u003eThe ZWO H-Alpha filter has a Band-pass of  7nm and passes light at 656nm  wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_e658b1bf-c241-4ff0-90fa-58b4ae1f7463.jpg?v=1765070556\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-18743\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_e658b1bf-c241-4ff0-90fa-58b4ae1f7463.jpg?v=1765070556\" alt=\"Ha 7nm Filter\" width=\"800\" height=\"800\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Ha-7nm-Filter_e658b1bf-c241-4ff0-90fa-58b4ae1f7463.jpg?v=1765070556 800w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-150x150.jpg 150w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-300x300.jpg 300w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-180x180.jpg 180w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Ha-7nm-Filter-600x600.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM：7±0.5nm\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wavefront  over the both surfaces\u003c\/li\u003e\n\u003cli\u003eAbout 90% transmission at H-alpha line 656nm (H-Alpha filter )\u003c\/li\u003e\n\u003cli\u003eAbout 90% transmission at SII line 672nm (SII filter )\u003c\/li\u003e\n\u003cli\u003eAbout 90% transmission at major OIII line 500nm (OIII filter )\u003c\/li\u003e\n\u003cli\u003eInfrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli\u003e\u0026lt;0.1% transmission of off-band, OD3(Optical Density)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission Curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_382fedc5-ddd1-463a-b9f9-cfd78cff016c.jpg?v=1765070560\"\u003e\u003cimg decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-11027\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_382fedc5-ddd1-463a-b9f9-cfd78cff016c.jpg?v=1765070560\" alt=\"NB filters TP\" width=\"989\" height=\"633\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/NB-filters-TP_382fedc5-ddd1-463a-b9f9-cfd78cff016c.jpg?v=1765070560 989w, https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/NB-filters-TP-300x192.jpg 300w\" sizes=\"(max-width: 989px) 100vw, 989px\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\"","offer_id":32385177485392,"sku":"ZWO Ha7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":32385177518160,"sku":"ZWO Ha7nmD31","price":212.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":32385177550928,"sku":"ZWO Ha7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32385177583696,"sku":"ZWO Ha7nmD2","price":349.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-filter-zwo-7nm-h-alpha-narrowband-filter-15174630801488.jpg?v=1736013958"},{"product_id":"310245","title":"Explore Scientific Neutral Density Filter 1.25\" ND 0.9 - 310245","description":"\u003cspan appify_fntsize=\"16px\"\u003eThe neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradiation when observing the Moon with any telescope 4\"(10.2cm) and larger. The ND96 filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness.\u003c\/span\u003e\u003cbr appify_fntsize=\"16px\"\u003e\u003cbr appify_fntsize=\"16px\"\u003e\u003cspan appify_fntsize=\"16px\"\u003eColor Filter #ND96 Moon Filter (0.9 density; 13% transmission)\u003c\/span\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382658640,"sku":"310245","price":70.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-neutral-density-filter-1-25-nd-0-9-310245-15369510125648.jpg?v=1668389392"},{"product_id":"310205","title":"Explore Scientific Nebula Filter 1.25\" O-III - 310205","description":"\u003cp appify_fntsize=\"16px\"\u003eExplore Scientific Nebula Filter 1.25\" O-III Range from 483nm to 511nm with peak at 496nm. Transmission 96.7%\u003c\/p\u003e\n\u003cp appify_fntsize=\"16px\"\u003e\u003cstrong appify_fntsize=\"16px\"\u003eOxygen III\u003c\/strong\u003e\u003cspan appify_fntsize=\"16px\"\u003e\u003cspan\u003e \u003c\/span\u003e- This is the highest contrast Nebula Filter in the series, a line filter for only the two emission lines of oxygen. A great choice for observations of supernova remnants and other nebulae that glow in OIII. Other types of objects that glow in all parts of the visible spectrum (e.g. galaxies) are reduced visibly, but some normally invisible regions of nebulae are clearly visible. This filter fits all standard 1.25-inch eyepieces and filter wheels. \u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382691408,"sku":"310205","price":158.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-nebula-filter-1-25-o-iii-310205-15369429385296.jpg?v=1668389569"},{"product_id":"310215","title":"Explore Scientific UHC Nebula Filter 1.25\" - 310215","description":"\u003cp appify_fntsize=\"16px\"\u003eExplore Scientific Nebula Filter 1.25\" UHC Range from 458nm to 508nm with peak at 488nm. Transmission 96.7%\u003cstrong appify_fntsize=\"16px\"\u003e\u003cbr appify_fntsize=\"16px\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp appify_fntsize=\"16px\"\u003e\u003cstrong appify_fntsize=\"16px\"\u003eUHC\u003c\/strong\u003e\u003cspan appify_fntsize=\"16px\"\u003e\u003cspan\u003e \u003c\/span\u003e- This is an ultra-high contrast narrow-band filter, designed for observing the broad range of nebulae with 1.25-inch standard eyepieces or filter wheels. The Band-pass is tighter than the CLS Nebula Filter, thereby blocking even more light from artificial lights and airglow.\u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382724176,"sku":"310215","price":158.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-uhc-nebula-filter-1-25-310215-15369438298192.jpg?v=1668388847"},{"product_id":"310225","title":"Explore Scientific CLS Nebula Filter 1.25\" - 310225","description":"\u003cspan\u003eExplore Scientific Nebula Filter 1.25\" CLS Range from 436nm to 536nm with peak at 488nm. Transmission 98.3%\u003c\/span\u003e\n\u003cp appify_fntsize=\"16px\"\u003eThis is a general-purpose light-pollution reduction filter designed for observing the broad range of deep sky objects including nebulae and galaxies. The CLS \u003cspan appify_fntsize=\"16px\"\u003edoes a good job of increasing contrast, providing a darker sky background.\u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382756944,"sku":"310225","price":154.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-cls-nebula-filter-1-25-310225-15369393406032.jpg?v=1668411534"},{"product_id":"310235","title":"Explore Scientific Nebula Filter 1.25\" H-Beta - 310235","description":"\u003cp appify_fntsize=\"16px\"\u003eExplore Scientific Nebula Filter 1.25\" H-Beta Range from 478nm to 496nm with peak at 489nm. Transmission 94.5%\u003c\/p\u003e\n\u003cp appify_fntsize=\"16px\"\u003e\u003cstrong appify_fntsize=\"16px\"\u003eH-Beta\u003c\/strong\u003e\u003cspan appify_fntsize=\"16px\"\u003e\u003cspan\u003e \u003c\/span\u003e- Hydrogen is the most abundant element in the universe and many nebulae glow in the light of H-beta. This line filter blocks all other wavelengths (and thereby nearly all of the artificial light) and only the emission line of hydrogen beta will pass. This filter fits all standard 1.25-inch eyepieces and filter wheels. \u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382789712,"sku":"310235","price":179.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-nebula-filter-1-25-h-beta-310235-15369419653200.jpg?v=1668389574"},{"product_id":"310240","title":"Explore Scientific Neutral Density Filter 2\" ND 0.9 - 310240","description":"\u003cspan appify_fntsize=\"16px\"\u003eThe neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradiation when observing the Moon with any telescope 4\"(10.2cm) and larger. The ND96 filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness.\u003c\/span\u003e\u003cbr appify_fntsize=\"16px\"\u003e\u003cbr appify_fntsize=\"16px\"\u003e\u003cspan appify_fntsize=\"16px\"\u003eColor Filter #ND96 Moon Filter (0.9 density; 13% transmission)\u003c\/span\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382822480,"sku":"310240","price":86.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-neutral-density-filter-2-nd-0-9-310240-15369471524944.jpg?v=1668389387"},{"product_id":"310220","title":"Explore Scientific CLS Nebula Filter 2\" - 310220","description":"\u003cp appify_fntsize=\"16px\"\u003e\u003cspan appify_fntsize=\"16px\"\u003eExplore Scientific Nebula Filter 1.25\" CLS Range from 436nm to 536nm with peak at 488nm. Transmission 98.3%\u003c\/span\u003e\u003c\/p\u003e\n\u003cp appify_fntsize=\"16px\"\u003e\u003cspan appify_fntsize=\"16px\"\u003eThis is a general-purpose light-pollution reduction filter designed for observing the broad range of deep sky objects including nebulae and galaxies. The CLS \u003c\/span\u003e\u003cspan appify_fntsize=\"16px\"\u003edoes a good job of increasing contrast, providing a darker sky background. \u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382920784,"sku":"310220","price":165.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-cls-nebula-filter-2-310220-15369456812112.jpg?v=1668411528"},{"product_id":"310230","title":"Explore Scientific Nebula Filter 2\" H-Beta - 310230","description":"\u003cp appify_fntsize=\"16px\"\u003eExplore Scientific Nebula Filter 1.25\" H-Beta Range from 478nm to 496nm with peak at 489nm. Transmission 94.5%\u003c\/p\u003e\n\u003cp appify_fntsize=\"16px\"\u003e\u003cstrong appify_fntsize=\"16px\"\u003eH-Beta\u003c\/strong\u003e\u003cspan appify_fntsize=\"16px\"\u003e\u003cspan\u003e \u003c\/span\u003e- Hydrogen is the most abundant element in the universe and many nebulae glow in the light of H-beta. This line filter blocks all other wavelengths (and thereby nearly all of the artificial light) and only the emission line of hydrogen beta will pass. This filter fits all standard 2.0-inch eyepieces and filter wheels. \u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":32476382953552,"sku":"310230","price":251.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/explore-scientific-filter-explore-scientific-nebula-filter-2-h-beta-310230-15369434759248.jpg?v=1668389563"},{"product_id":"zwo-additional-2-filter-drawer-slide-for-the-m54-to-m48-filter-drawer-system","title":"ZWO Additional 2\" Filter Drawer Slide for the ORIGINAL M54 to M48 Filter Drawer System - ZWO FL-HLDR-M54","description":"\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003ePLEASE NOTE: These are the older filter sliders for the previous version of the Filter Drawer. These are discontinued by ZWO,\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca title='NEW ZWO 2\" Filter Slider' href=\"https:\/\/telescopescanada.ca\/products\/zwo-new-additional-2-filter-drawer-slide-for-the-m42-m54-filter-drawer-systems-zwo-fl-hldr\"\u003eSee New M54 Filter Slider Here\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/FilterDrawerCompatibility_480x480.jpg?v=1676989614\" alt=\"\" data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp\u003eOne additional 2\" filter drawer slide for the \u003ca href=\"https:\/\/telescopescanada.ca\/collections\/zwo\/products\/zwo-filter-drawer-m54-to-m48?_pos=1\u0026amp;_sid=96b6a58cd\u0026amp;_ss=r\"\u003eZWO M54 to M48 Filter Drawer System\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFilter slide: M48 * 0.75 female thread \u003c\/p\u003e\n\u003cp\u003eThe drawer system is a total of 21 mm in thickness.\u003c\/p\u003e\n\u003cp\u003eThe strong magnet holding the slide creates a good seal and avoids accidental filter drops.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":32491200151632,"sku":"ZWO FL-HLDR-M54","price":39.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/products\/zwo-accessory-zwo-additional-2-filter-drawer-slide-for-the-m54-to-m48-filter-drawer-system-zwo-fl-hldr-m54-15387441889360.jpg?v=1736013956"},{"product_id":"baader-fringe-killer-color-correction-filter","title":"Baader Fringe Killer Color Correction-Filter","description":"\u003cul\u003e\n\u003cli\u003eThe fringe killer blocks de-focused light in the blue spectrum, as well as in the red part of the spectrum (IR) above 700nm, usually seen in small achromat telescopes.\u003c\/li\u003e\n\u003cli\u003eThe smaller details on craters of the Moon and planetary surfaces are so much more visible!\u003c\/li\u003e\n\u003cli\u003ePlane-optically polished; can be used well before the focal point of the optical system, without any loss of sharpness, as a single filter in front of a binocular for afocal projection with digital cameras.\u003c\/li\u003e\n\u003cli\u003eProvides the brightest picture of all industrially manufactured colour error-correction systems. Thus, the Fringe-Killer is a must for small refractors!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePlane-optically polished with Phantom Group Coating\u003c\/h4\u003e\n\u003cdiv class=\"leftImage\"\u003e\n\u003cimg alt=\"Baader Fringe Killer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/fringe-killer-125_200.jpg?v=1765045189\" width=\"300\"\u003e\n\u003cdiv class=\"imageCaption\"\u003eBaader Fringe Killer\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe Fringe-Killer (Fringe = colour fringing) blocks unfocused light in the red part of the spectrum (IR) uo to 100% - but above all suppresses over 50% of the interfering stray light in the blue spectral range - without changing the colour impression of the image.\u003c\/p\u003e\n\u003cp\u003eThe most delicate details of lunar craters and planetary surfaces can be seen with a much higher contrast.\u003c\/p\u003e\n\u003cp\u003eThe Baader Fringe-Killer Color Correction-Filter prevents unwanted colour fringes in both the blue spectral range and in the NIR above 700 nm! The visual impact initially corresponds to a minus violet filter, as opposed to this but the image colour remains broadly balanced. In itself a contradiction in terms? It can only be implemented by applying modern DWDM plasma assisted coating technology, which allows the application of approximately 100 individual layers on a flat-optically polished face surface perfectly and reproducibly without compromising visual quality. This fine optical precision tool also allows inexpensive China-refractors to reach the promised imaging performance. The reduction of chromatic aberration corresponds to what is achieved by corrections-lens systems, which usually cost 20 times more.\u003c\/p\u003e\n\u003cdiv class=\"emptyClear\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"rightImage\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/f_killer_vergleich_sirius_3486da13-294b-4184-9aaf-13a1e60f29be.jpg?v=1765045205\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg height=\"144\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/f_killer_vergleich_sirius_3486da13-294b-4184-9aaf-13a1e60f29be.jpg?v=1765045205\" width=\"150\"\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eExample of Sirius with and without the Fringe Killer\u003cbr\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/f_killer_vergleich_sirius_3486da13-294b-4184-9aaf-13a1e60f29be.jpg?v=1765045205\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"imageCaption\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4\u003eThe Baader Fringe Killer Overview\u003c\/h4\u003e\n\u003ch4\u003eFacts and Figures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIs due to its construction both visually and photographically a very valuable aid\u003c\/li\u003e\n\u003cli\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli\u003eForms in the range between 450 to 480 nm with a plateau at around 50% transmission rate, the coating becomes more complex to produce than even the narrowest Nebula filters.\u003c\/li\u003e\n\u003cli\u003eAchieved in the band-pass the highest transmission of all previously available colour fringe, whether filter or correction lens. From 486-656 nm all relevant deep sky wavelengths are completely transmitted. Visually this is enough light for even high magnifications.\u003c\/li\u003e\n\u003cli\u003eAbove of 656 nm (H-alpha), at 660nm, the transmission sinks very fast. In the NIR at 670nm, transmission is already down to 50%, and at 690nm it is already close to zero. The NIR is fully blocked up to 1150nm. This way, details on planets are shown much clearer when using CCD\/CMOS-cameras, too.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rightImage\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/fringe-killer-application_7375876a-a8ac-47b3-a7cc-f95445d49762.jpg?v=1765045213\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/fringe-killer-application_7375876a-a8ac-47b3-a7cc-f95445d49762.jpg?v=1765045213\" width=\"300\"\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eThe clearly visible colour correction of the Baader Fringe Killer.\u003cspan\u003e \u003c\/span\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/fringe-killer-application_7375876a-a8ac-47b3-a7cc-f95445d49762.jpg?v=1765045213\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"imageCaption\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eTHE HIGHLIGHTS OF THE BAADER FRINGE KILLER COLOR CORRECTION-FILTER\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eProvides the brightest image of all industrially produced colour error correction systems. Thus the Fringe Killer is a must for even the smallest telescopes.\u003c\/li\u003e\n\u003cli\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli\u003eCancels the devastating intensity of the disturbing purple fringing in a new form, which was never implemented to date in astronomical filters\u003c\/li\u003e\n\u003cli\u003eEven weak nuances remain clearly visible in the planet due to the excellent colour balance.\u003c\/li\u003e\n\u003cli\u003eIn conjunction with an RG-610 Red Filter produces a narrowband Ha-pass filter with an only 70 nm wide windows and 95% light transmission - at an incredibly low price!\u003c\/li\u003e\n\u003cli\u003eThe combination with the Neodymium Sky glow Filter (with Phantom-Group-Coating) results in a balanced, breathtaking contrast to the observation of fine lunar and planetary details.\u003c\/li\u003e\n\u003cli\u003ePlane-optically polished for perfect sharpness, even when the filter is assembled well before the focal point (or binocular digital camera insert).\u003c\/li\u003e\n\u003cli\u003eNo deterioration of resolution with high magnification - as would happen with flame-polished (raw polished) glass, commonly used for all sorts of filters!\u003c\/li\u003e\n\u003cli\u003eHight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. Almost 50 layers on either side, carefully positioned as not to impair the optical quality of the substrate surface\u003c\/li\u003e\n\u003cli\u003eMakes the performance of a simple f\/8 economy refractor look like a classic f\/15 Fraunhofer achromat. See it to believe it!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ch2\u003eAdditional Information\u003c\/h2\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"25%\"\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eWeight (kg)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.065\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eTransmission Range\u003c\/th\u003e\n\u003ctd class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Thickness (without cell)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eAR-Coating\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ePhantom Coating® Group, Plane-optically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Usage\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eColor Correction, IR-Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter mounted\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eType of Filter\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBand-pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eSingle or Set?\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter shape\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cscript type=\"text\/javascript\"\u003e\/\/ \u003c![CDATA[\ndecorateTable('product-attribute-specs-table')\n\/\/ ]]\u003e\u003c\/script\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":32505750913104,"sku":"2458370","price":134.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32505750945872,"sku":"2458375","price":194.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/baader-planetarium-filter-baader-fringe-killer-color-correction-filter-43849780101339.jpg?v=1754514614"},{"product_id":"baader-contrast-booster-filter","title":"Baader Contrast-Booster Filter","description":"\u003cul\u003e\n\u003cli\u003eContrast Booster Filter that completely eliminates false color\u003c\/li\u003e\n\u003cli\u003eRemoves the bluish \"hue\" (=lack of contrast) during lunar, planetary, solar and terrestrial observation\u003c\/li\u003e\n\u003cli\u003eBoosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission\u003c\/li\u003e\n\u003cli\u003ePlane-optically polished, non-ageing sealed coating edges\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003cdiv class=\"leftImage\"\u003e\n\u003cimg alt=\"Baader Kontrast Booster\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/gross_ContrastBooster-Filter_2inch_optically_polished_20_PhantomCoating-Group.jpg?v=1765044883\" width=\"300\"\u003e\n\u003cdiv class=\"imageCaption\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"imageCaption\"\u003eBaader Contrast Booster®\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eDiscover your telescope anew – with the Baader Contrast Booster\u003c\/p\u003e\n\u003cp\u003eA unique filter for many different astronomical tasks ndash; incomparable in acuity to combinations of generic colour filters, made of raw polished glass – where surface inaccuracy adds up in the optical wave front to an unbearable degree. Especially designed to improve the beginners telescopes – to provide a professional replacement for the simple \"dark green\" Moon \u0026amp; Solar-Filters made of \"raw polished\" glass.\u003c\/p\u003e\n\u003cp\u003e\u003cspan color=\"#FF0000\" style=\"color: #ff0000;\"\u003eFor Solar Observation use only in combination with Baader AstroSolar Safety Film!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eFeatures:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEliminates the colour error of economy refractors.\u003c\/li\u003e\n\u003cli\u003eClearly puts the real quality of the lens on display.\u003c\/li\u003e\n\u003cli\u003eRemoves the bluish \"hue\" (=lack of contrast) during lunar-, planetary-, solar- and terrestrial observation.\u003c\/li\u003e\n\u003cli\u003eStrongly emphasizes surface detail on Jupiter and Mars. If you have never seen the GRS (Great Red Spot) on Jupiter – with this filter you will.\u003c\/li\u003e\n\u003cli\u003eOver 95 % transmission – provides a bright, brilliant image compared to the usual dark green colour filters, used to bring out detail on Jupiter. Colour recognition will be retained.\u003c\/li\u003e\n\u003cli\u003eThe ultimate in lunar filters. Moon (and Sun) appear much more natural in color (with a slight yellowish tint), compared to the usual low priced dark green Moon-filters, usually offered for beginners telescopes.\u003c\/li\u003e\n\u003cli\u003eCompletely removes distracting false colour and the resulting smeared and washed out image details. You have never ever seen the Moon or the Sun (with AstroSolar Safety Film) so tack sharp in an economy priced telescope.\u003c\/li\u003e\n\u003cli\u003eBlocks atmospheric \"stray light\" (sky glow). Sky background turns into pitch black.\u003c\/li\u003e\n\u003cli\u003eFits into 1¼\" and 2\" standard filter threads.\u003c\/li\u003e\n\u003cli\u003ePlane-optically polished, suitable for being used in front of a binocular viewer, or for a-focal image projection during digital imaging (way in front of the focal plane).\u003c\/li\u003e\n\u003cli\u003eNo deterioration of resolution with magnifications of 200x and more – as with \"raw polished\" (flame polished) glass.\u003c\/li\u003e\n\u003cli\u003eSubstrate (glass melt) Neodymium doped glass.\u003c\/li\u003e\n\u003cli\u003eCoating \/ rear face: 7-layer hard-multicoating, featuring 0.25% reflection.\u003c\/li\u003e\n\u003cli\u003eCoating \/ front face: 23-layer dielectric long pass blocker.\u003c\/li\u003e\n\u003cli\u003eIon beam hardened coatings on both faces, absolutely scratch resistant – may be cleaned any time without fear with Baader Optical Wonder Fluid.\u003c\/li\u003e\n\u003cli\u003eA significant part of city light air pollution, as well as atmospheric Airglow is removed from the telescopic image.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eTHE TRANSMISSION LINE OF BAADER CONTRAST BOOSTER\u003c\/h5\u003e\n\u003cdiv class=\"leftImage\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/trans-booster_98cb052b-8385-42a3-b18f-9403c0257d40.gif?v=1765044895\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg alt=\"Transmissionskurve\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/trans-booster_98cb052b-8385-42a3-b18f-9403c0257d40.gif?v=1765044895\" width=\"300\"\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eThe transmission line of Baader Contrast Booster\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rightImage\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/trans-boouvir_f67e0bce-c53a-4bb3-ab13-e915a64a1d20.gif?v=1765044898\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg alt=\"Transmissionskurve mit UV\/IR Sperrfilter\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/trans-boouvir_f67e0bce-c53a-4bb3-ab13-e915a64a1d20.gif?v=1765044898\" width=\"300\"\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eThe transmission line of Baader Contrast Booster, combined with the UV\/IR cut filter for CCD Astronomy\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe transmission curve shows the light transmittance in percent versus the light wavelength in nanometres. Note the high transmission for visual observations of H-alpha (98%), H-beta (87%) and OIII (82%).\u003c\/p\u003e\n\u003cp\u003e\u003cspan id=\"result_box\" lang=\"en\"\u003eIn a light polluted town or city mercury and sodium vapour street lights emit at 435nm and between 570-590nm. Here the filter transmission is between 0.3 and 3%.\u003cbr\u003e\u003cbr\u003eTogether with the Baader UV \/ IR cut filter Baader Contrast Booster is additionally an optimal filter for CCD images from light-polluted big city and metropolitan area (see second filter curve).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ch2\u003eAdditional Information\u003c\/h2\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"25%\"\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eWeight (kg)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.067\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eTransmission Range\u003c\/th\u003e\n\u003ctd class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Thickness (without cell)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eAR-Coating\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ePhantom Coating® Group, Plane-optically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Usage\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eContrast Enhancement, Color Correction, IR-Cut, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter mounted\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eType of Filter\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBand-pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eSingle or Set?\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter shape\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cscript type=\"text\/javascript\"\u003e\/\/ \u003c![CDATA[\ndecorateTable('product-attribute-specs-table')\n\/\/ ]]\u003e\u003c\/script\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":32506006306896,"sku":"2458360","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32506006339664,"sku":"2458365","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/baader-planetarium-filter-baader-contrast-booster-filter-43849779740891.jpg?v=1754514613"},{"product_id":"baader-semi-apo-filter","title":"Baader Semi-APO Filter","description":"\u003cul\u003e\n\u003cli\u003eTwo filters made into one for maximum brightness\u003c\/li\u003e\n\u003cli\u003eCombines Fringe-Killer with Moon \u0026amp; Sky glow for Semi-APO contrast with refractors\u003c\/li\u003e\n\u003cli\u003eNon-ageing sealed coating edges\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCombination of \"Neodymium Moon \u0026amp; Sky glow\" and \"Fringe Killer\" Filters\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cp\u003eTime and time again we were made aware of customers who were combining our Neodymium Moon and Sky glow filter with our Fringe Killers to deliver amazingly colour-corrected images to achromatic refractors. This combination however did produce reflections.\u003c\/p\u003e\n\u003cp\u003eAfter analyzing these reports we developed our Baader Semi-APO filter with IR blocker, a reflection-free combination of the Moon \u0026amp; Sky glow with a stronger coating of the Fringe killer. This result was a virtually colour-neutral image without the blue and red halos (violet fringing) and an increase to image contrast. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cscript type=\"text\/javascript\"\u003edecorateTable('product-attribute-specs-table')\u003c\/script\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"25%\"\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eWeight (kg)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.062\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eTransmission Range\u003c\/th\u003e\n\u003ctd class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Thickness (without cell)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eAR-Coating\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ePhantom Coating® Group, Plane-optically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Usage\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eCCD, Color Correction, IR-Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter mounted\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eType of Filter\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBand-pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eSingle or Set?\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter shape\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":32506336870480,"sku":"2458398","price":132.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32506336903248,"sku":"2458399","price":238.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/baader-planetarium-filter-baader-semi-apo-filter-43849778462939.jpg?v=1754514610"},{"product_id":"baader-moon-skyglowfilter-new-version-w-higher-transmission","title":"Baader Moon \u0026 Skyglow Neodymium Filter - New Version w\/Higher Transmission","description":"\u003cul\u003e\n\u003cli\u003eThe best visual and photographic filter for contrast enhancement for all telescopes, without loss of image brightness!\u003c\/li\u003e\n\u003cli\u003eThe effect of the element neodymium as filter material is very impressive. When added to optical glass, it enhances contrast, enhances the red colour in the image (especially with Mars and Jupiter) and it darkens the spectral region which is particularly marked by street lamp light, which is the biggest contributor to the nightly \"Sky glow\".\u003c\/li\u003e\n\u003cli\u003ePlano-optically polished and MC-coated – with IR-cut coatings!, without any loss of sharpness as a single filter in front of a binocular or be used for afocal projection with digital cameras (far from the focal point!)\u003c\/li\u003e\n\u003cli\u003eThe IR spectral range is blocked making stars much sharper when used with dSLRs.\u003c\/li\u003e\n\u003cli\u003eThe Baader Moon \u0026amp; Sky glow Neodymium Filter are two filters in one: Neodymium contrast enhancement filter and UV\/IR blocker.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"leftImage\"\u003e\n\u003cimg alt=\"D¼\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/125_200_neodymium_gross.jpg?v=1765163151\" width=\"300\"\u003e\n\u003cdiv class=\"imageCaption\"\u003e1¼\" and 2\" Neodymium Lunar \u0026amp; Sky glow Filter\u003c\/div\u003e\n\u003cdiv class=\"imageCaption\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eDrastic contrast enhancement for all telescopes, without loss of image brightness! This filter is initially based on a development by Carl Zeiss. The effect of the element neodymium as filter material is very impressive. If used as co-mixture to optical glass, it improves the contrast and enhances the red portions of the image (especially for Mars and Jupiter). At night it blocks that part of the spectrum, which suffers most from street lighting – and it blocks the light pollution, also known as „sky glow\". And lastly, the applied UV\/IR blocking coating (Luminance-coating - check the spectral trace) cuts all unwanted UV below 400 nm and NIR above 700 nm - this makes it the „sharpest contrast enhancing filter\" for imaging.\u003c\/p\u003e\n\u003cp\u003eCompare with the moon \u0026amp; Sky glow filter before the naked eye, to test the effectiveness. Red and blue colours are extensively strengthened. If you cannot see the GRS (Great Red Spot) due to pollution try this which will allow you to see it.\u003c\/p\u003e\n\u003cp\u003eIn order to establish a precise plan area and to maintain the planarity despite the applied forces through the different layers of coating, a high technical effort is necessary. You have to choose from a large amount of raw glass only the best pieces in tension-free annealed quality to even hope for a good final quality may. All too easily, the glass deforms with improper preparation or coating on older evaporation systems. The final product is almost useless, if not greatest of care is taken at every stage of production.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eSURFACE DETAILS ON MARS, JUPITER AND MOON AS WELL AS MANY DEEP-SKY-OBJECTS BECOME MUCH MORE PROMINENT.\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSelective contrast filter, especially suitable for all reflector telescopes\u003c\/li\u003e\n\u003cli\u003eFilters out specific wavelengths, especially those caused by streetlight and most importantly their scattered light which lightens up the night sky\u003c\/li\u003e\n\u003cli\u003eSelective blocking retains natural colours intact but with RGB significantly enhanced, differences in colour and brightness persist.\u003c\/li\u003e\n\u003cli\u003e95% transmission in the selected spectral range.\u003c\/li\u003e\n\u003cli\u003eFits all standard filter threads and can be combined with other filters – e.g. the Plane-optically\u003cbr\u003epolished (!) Baader planetary colour filters. This way, you can see fine details better or combine several images with a monochrome camera to achieve colour images.\u003c\/li\u003e\n\u003cli\u003eThe filter is at the same time optimized for Astrophotography due to it‘s full UV\/IR-blocking coating. When used with DSLRs, stars will remain much tighter, because the unfocussed UV and IR parts of the spectrum are blocked out.\u003c\/li\u003e\n\u003cli\u003ePlane-optically polished; can be used without problems in front of a binoviewer or for afocal photography – far away from the focus without loosing sharpness!\u003c\/li\u003e\n\u003cli\u003eThe fine-optical polish and absence of wedge error in the glass ensure perfect sharpness when magnifying more than 200x - while the much cheaper \"fire -polished\" filter glasses destroy the optical wavefront at high mags\u003c\/li\u003e\n\u003cli\u003eNeodymium doped optical glass\u003c\/li\u003e\n\u003cli\u003eCoatings Front\/Back: 7-layer hard-BBAR-coating \/ 27-layered dielectric UV\/IR-cut coating\u003c\/li\u003e\n\u003cli\u003eUltra-hard and durable Ion-beam hardened coatings – may be cleaned anytime without fear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSpectral Curve of the Moon \u0026amp; Sky glow Filter\u003c\/h3\u003e\n\u003cdiv class=\"leftImage\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/moon-sky%20glow-wavelength_501e137a-4faf-43a2-938f-49c2f4738bb9.jpg?v=1765163163\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg alt=\"Spectral curve of Moon \u0026amp; Sky glow Filter\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/moon-sky%20glow-wavelength_501e137a-4faf-43a2-938f-49c2f4738bb9.jpg?v=1765163163\" width=\"250\"\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eSpectral curve of the Moon \u0026amp; Sky glow filter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe adjacent graph shows you the spectral curve of our Neodymium Moon \u0026amp; Sky glow filters. On the horizontal axis, the wavelength in nanometers, and the vertical axis is the transmission amount (opacity) specified in percent.\u003c\/p\u003e\n\u003cp\u003eThe area under the curve is the spectral range that can pass through the filter.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eImportant note:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eBefore you buy a \"Moon and Sky glow\" filter, which is now available from several manufacturers, compare the transmission curves! You will find that the original \"Baader Moon\u0026amp;Sky glow\" filter has the highest transmission and is blocked in the UV\/IR, with the same layer system as a Baader L filter. This means sharper images because only the spectral range where the telescope can deliver a sharp image, reaches the chip. In addition, our filter is plano-optically polished.  Only few manufacturers are willing to do this, only because of this the filter is also suitable for the highest magnifications.\u003c\/p\u003e\n\u003cdiv class=\"emptyClear\"\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4\u003e\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"25%\"\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eWeight (kg)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.062\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eTransmission Range\u003c\/th\u003e\n\u003ctd class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Thickness (without cell)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eAR-Coating\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ePhantom Coating® Group, Plane-optically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter Usage\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eCCD, Contrast Enhancement, Color Correction, IR-Cut, Light Pollution Reduction, Lunar, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter mounted\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eType of Filter\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBand-pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eSingle or Set?\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFilter shape\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cscript type=\"text\/javascript\"\u003e\/\/ \u003c![CDATA[\ndecorateTable('product-attribute-specs-table')\n\/\/ ]]\u003e\u003c\/script\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":32506452017232,"sku":"2458305A","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":32506452050000,"sku":"2458334A","price":213.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/baader-planetarium-filter-baader-moon-skyglow-neodymium-filter-new-version-w-higher-transmission-43849776234715.jpg?v=1754514608"}],"url":"https:\/\/telescopescanada.ca\/collections\/filter-wheels.oembed?page=22","provider":"Telescopes Canada","version":"1.0","type":"link"}