{"product_id":"baader-eyepiece-filter-red-2-610nm-longpass-optically-polished-w-mc-2458317","title":"Baader Eyepiece Filter Red 2\", 610nm Longpass, Optically Polished w\/MC - 2458317","description":"\u003ch2\u003eHighlights\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRed 610nm long-pass filter with steep absorption edge.\u003c\/li\u003e\n\u003cli\u003eFilters the H-alpha line from the visible spectrum.\u003c\/li\u003e\n\u003cli\u003eBlue and Green lights is almost completely filtered blocked increasing contrast between the light and dark bands on Jupiter and Saturn.\u003c\/li\u003e\n\u003cli\u003eMost interesting filter to use for observing the polar caps of Mars.\u003c\/li\u003e\n\u003cli\u003eAn optimum filter for daily observation of all the planets.\u003c\/li\u003e\n\u003cli\u003eMulti-coated for max contrast – no reflections, scatter or dimming.\u003c\/li\u003e\n\u003cli\u003ePlane-optically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.\u003c\/li\u003e\n\u003cli\u003eBoth sides 7-layer AR coating with only 0.25% residual reflection per surface. This is the most antireflective that has ever been undertaken with color filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eColour filters for increased contrast of lunar and planetary observations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\"Less is more!\" Better a few filters with high optical performance produced for astronomical observations than whole mountains of filters with mediocre quality.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"leftImage\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/2458310_e63cef53-9178-4e32-b03b-5340ebb42c20.jpg?v=1765045087\" class=\"image-popup\" target=\"_blank\"\u003e\u003cimg width=\"400\" title='The complete Baader 2\" Filter Set' src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/2458310_e63cef53-9178-4e32-b03b-5340ebb42c20.jpg?v=1765045087?auto=webp\u0026amp;format=pjpg\u0026amp;quality=85\" alt='The complete Baader 2\" Filter Set'\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eThe complete Baader Der 2\" Filter Set\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rightImage\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/2458300_b779dbce-0238-423f-a601-f0584e9b913f.jpg?v=1765045091\" class=\"image-popup\" target=\"_blank\"\u003e\u003cimg width=\"400\" title='The complete Baader 1 1\/4\" Filter Set' src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/2458300_b779dbce-0238-423f-a601-f0584e9b913f.jpg?v=1765045091?auto=webp\u0026amp;format=pjpg\u0026amp;quality=85\" alt='The complete Baader 1 1\/4\" Filter Set'\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eThe complete Baader 1¼\" Filter Set\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Baader colour filters are carefully prepared for amateur astronomical interests. The glass are co-planer fine optically polished. These filters exceed the quality of the usual \"raw polished\" (hot flamed) coloured glass filters.\u003c\/p\u003e\n\u003cp\u003eBecause they are fine optically polished, these filters can be at any point in the mean path - far ahead of the focal point (for example, in front of a binocular approach!) without causing defects (astigmatism) or to degrade the image otherwise in any way!\u003c\/p\u003e\n\u003cp\u003eThe parallelism of the optical surfaces is excellent with 30 Arc seconds. Double images are absolutely excluded. For each filter colour, the transmission curve is supplied as a measurement protocol.\u003c\/p\u003e\n\u003cp\u003eThese filters are screwed into the filter thread of eyepieces or planetary imaging cams (Skyris). A thread at either end of the filter allows the filters to be combined with each other or with other filters (for example with a Baader UV \/ IR infrared cut filter).\u003c\/p\u003e\n\u003cdiv class=\"rightImage\"\u003e\n\u003ca title=\"Transmission curves of 6 Baader color filters (dark blue, light blue, green, yellow, orange and red)\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/filterkurve_farbfiltersatz.jpg?v=1765045095\" class=\"image-popup\" target=\"_blank\"\u003e\u003cimg width=\"300\" title=\"Transmission curves of 6 Baader color filters (dark blue, light blue, green, yellow, orange and red)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/filterkurve_farbfiltersatz_thumb_de61a61a-3681-48fc-9988-c40adb0c4747.jpg?v=1765045099?auto=webp\u0026amp;format=pjpg\u0026amp;quality=85\" height=\"165\" alt=\"Transmission curves of 6 Baader color filters (dark blue, light blue, green, yellow, orange and red)\"\u003e\u003c\/a\u003e\n\u003cdiv class=\"imageCaption\"\u003eTransmission curves of 6 Baader color filters (dark blue, light blue, green, yellow, orange and red)\u003c\/div\u003e\n\u003cdiv class=\"imageCaption\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2 class=\"imageCaption\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/filterkurve_farbfiltersatz_thumb_de61a61a-3681-48fc-9988-c40adb0c4747.jpg?v=1765045099\" target=\"_blank\"\u003e\u003c\/a\u003eFeatures at a glance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eLargest free opening of all colour filters on the market to eliminate any vignetting.\u003c\/li\u003e\n\u003cli\u003eCNC machined \"grip crown\" provides excellent handling and comfort.\u003c\/li\u003e\n\u003cli\u003eBoth sides 7-layer AR coating with only 0.25% residual reflection per surface. This is the most antireflective that has ever been undertaken with color filters.\u003c\/li\u003e\n\u003cli\u003eThe most important criterion for any kind of light filtering is brightness. Certain spectral ranges at high magnification will only work at the highest light transmittance.\u003c\/li\u003e\n\u003cli\u003eThe long-pass filter in this filter set offers 98% transmission and produces no flare. Unmatched by other brands. This can be seen in comparison with standard colour filters at once - the filter colour radiant downright.\u003c\/li\u003e\n\u003cli\u003eThe combination of our infrared (IR) cut filter 1¼\" and the RG 610 red filter results as an extremely narrow-band H-? pass filter for the CCD photography of red emission nebulae - at a ridiculously low price!\u003c\/li\u003e\n\u003cli\u003eA wide range of adaptors allow the uses of T-2 photo threads (See: Baader Astro T-2 System™).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eThe classic yellow filter doubles as exoplanet filter\u003c\/h3\u003e\n\u003cp\u003eModern amateur astronomers have always had professional equipment at their disposal that also allows scientific work. In the observation of variable stars and the hunt for comets, cooperation with professional astronomers is nothing new. However, few people know that the hunt for exoplanets - which was only successful for the first time in the 1990s - is today also possible with amateur equipment.\u003c\/p\u003e\n\u003cp\u003eIn chapter 7 of his book Exoplanet Observing for Amateurs (downloadable from the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/brucegary.net\/book_EOA\/x.htm\" target=\"_blank\"\u003eauthor's website\u003c\/a\u003e), Bruce L. Gary recommends a CBB or Clear Blue-Blocking Filter: that is, an otherwise translucent filter that blocks blue (and UV). The light curve of our Colour Filter Yellow (495nm) meets these requirements for a CBB filter.\u003c\/p\u003e\n\u003cp\u003eWith maximum transmission in visible light, it also fulfils the second requirement for exoplanet hunting: since long exposure times are necessary, it does not swallow light unnecessarily and thus does not prolong the exposure time.\u003c\/p\u003e\n\u003cp\u003eNo wonder that creative suppliers have started to market yellow filters as new exoplanet filters. It is important to know that common cheap colour filters for planetary observation have neither an optical polish nor high-quality coatings and are therefore useless for qualitatively challenging photographic applications. However, this is not the case with our colour filters. All our colour filters are finely optically polished and 7-layer multi-coated on both sides. Our normal yellow filter is therefore equivalent to yellow filters which are offered with the title CBB filter – but which cost much more than our filter. We are pleased that our yellow filter is not only useful to increase the contrast of the members of our own solar system, as it has been for years, but can also be used for the search for alien worlds - without any extra charge for this additional task.\u003c\/p\u003e\n\u003ch3\u003eBaader Phantom Group Coating™\u003c\/h3\u003e\n\u003cp\u003eDeveloped by Baader Planetarium the coating is a 7-layer broadband coating with extremely low residual reflection. The term \"Group\" indicates that the respective most effective anti-reflection layer system was calculated for each type of glass of the filter.\u003c\/p\u003e\n\u003cp\u003eThis means that the anti-reflection layers of different colour filters are different. They are calculated to provide the maximum for the respective filtered colour transmission values.\u003c\/p\u003e\n\u003cp\u003eBoth sides of the filter are coated with 7-layer AR coating with only 0.25% residual reflection per surface. This is the most that has ever been provided for colour filters. The filter discs are screwed into the blackened aluminum frames and are delivered within a filter. Each filter is designed for multiple applications.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul class=\"customAttributes-list-qDg rounded\"\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"text-label-o47 font-bold inline-block mr-2\"\u003eSKU: 2458317\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"multiselect-label-g4u font-bold inline-block mr-2\"\u003eAR-Coating: Phantom Coating® Group\u003c\/div\u003e\n\u003cdiv class=\"multiselect-contentHtml-C27 inline\"\u003e\n\u003cdiv class=\"multiselect-option-2f0 inline-block break-words\"\u003ePlane-optically polished\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"text-label-o47 font-bold inline-block mr-2\"\u003eEAN Code: 4047825009739\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"select-label-3lv font-bold inline-block mr-2\"\u003eFilter mounted: Mounted (LPFC 6mm)\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"select-label-3lv font-bold inline-block mr-2\"\u003eFilter shape: round\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"select-label-3lv font-bold inline-block mr-2\"\u003eFilter size: 2 inch\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"textarea-label-XIL font-bold inline-block mr-2\"\u003eFilter Thickness (without cell): 2 mm\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"multiselect-label-g4u font-bold inline-block mr-2\"\u003eFilter Usage: Color, Planetary\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"text-label-o47 font-bold inline-block mr-2\"\u003eNet weight (kg): 0.01\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"select-label-3lv font-bold inline-block mr-2\"\u003eSingle or Set: Single Filter\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"text-label-o47 font-bold inline-block mr-2\"\u003eTransmission Range: \u0026gt; 610 nm\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"customAttributes-listItem-3fg border-solid border-b flex items-start min-h-[3rem]\"\u003e\n\u003cdiv class=\"multiselect-label-g4u font-bold inline-block mr-2\"\u003eType of Filter: Long-pass\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":49287982874843,"sku":"2458317","price":110.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/baader-planetarium-filter-baader-eyepiece-filter-red-1-25-610nm-longpass-optically-polished-w-mc-2458307-43849076539611.jpg?v=1754513933","url":"https:\/\/telescopescanada.ca\/products\/baader-eyepiece-filter-red-2-610nm-longpass-optically-polished-w-mc-2458317","provider":"Telescopes Canada","version":"1.0","type":"link"}