{"product_id":"antlia-ha-sii-and-oiii-3nm-pro-highspeed-filter-2-mounted","title":"Antlia Ha, SII and OIII 3nm Pro Highspeed Filter - 2'' Mounted","description":"\u003cdiv class=\"richContent\"\u003e\n\u003cdiv class=\"jz_fix_ue_img jz_reponsive_fix_table\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntlia Ha, SII and OIII \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e3\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003enm\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e Pro High-speed \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003eFilter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAntlia's SHO 3nm Pro High-speed Filters are further optimized for high-speed imaging systems by pre-shifting the center wavelength. This specially-optimized version will provide significantly SNR(Signal to Noise Ratio) for the fast telescopes\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ewith focal ratio between f\/2.6 and f\/3.6 than the standard 3nm Pro version.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe optical light path of a telescope is cone-shaped, which creates an angle\u003c\/span\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cspan\u003eand the center wavelength of the interference filter will shift toward shorter (blue) wavelengths as the angle of incidence((AOI) increases; the greater the angle\u003c\/span\u003e\u003cspan\u003e，\u003c\/span\u003e\u003cspan\u003e the greater the shift. The amount of beam deviation depends on the refractive index and the thickness of the substrate. The blue shift data by the simulation indicates that at a focal ratio of \u003c\/span\u003e\u003cspan\u003ef\/\u003c\/span\u003e\u003cspan\u003e2.6, the angle of incidence of the light cone is 10°and its bandwidth shift 2.2nm to shorter wavelengths. Therefore, the High-speed 3nm Pro narrowband filters are designed to be pre-shifted by 1.2nm towards the longer (red) end in order to compensate for the Blue shift and ensure high signal acquisition by telescopes with fast focal ratios\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBlue shift data simulation Figure:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ABUIABACGAAghaaLpwYopuvRuwcwuQo4kQY.jpg?v=1765043474\" width=\"1337\" height=\"785\" alt=\"Blue shift Data.jpg\" class=\"need_fix\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUsing these High-speed SHO \u003c\/span\u003e\u003cspan\u003e3nm Pro \u003c\/span\u003e\u003cspan\u003enarrowband filters\u003c\/span\u003e\u003cspan\u003e for the telescopes with focal ratio \u003c\/span\u003e\u003cspan\u003ebetween f\/2.6 and f\/3.6 shows much stronger and more contrasted in\u003c\/span\u003e\u003cspan\u003e astronomy\u003c\/span\u003e\u003cspan\u003e imaging compared to the standard Pro version.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor optics f-ratios slower than f\/3.6, the standard 3nm Pro filters are highly recommended. Meanwhile, if you use optics faster than f\/2.6,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ethe 4.5nm EDGE filters are the good choice.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTechnical Specifications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"667\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\" valign=\"center\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd width=\"151\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eHydrogen-alpha\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eOxygen III\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eSulfur-II\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"151\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"151\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e65\u003c\/span\u003e\u003cspan\u003e7\u003c\/span\u003e\u003cspan\u003e.5nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e50\u003c\/span\u003e\u003cspan\u003e1.9\u003c\/span\u003e\u003cspan\u003enm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e673.6nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003ePeak Transmission\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"151\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e90%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e90%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"150\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003e90%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eBlocking\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"451\" valign=\"center\" colspan=\"3\"\u003e\n\u003cp\u003e\u003cspan\u003e≥OD5 @ 300-1000nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\" valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eFilter Thickness\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"451\" valign=\"center\" colspan=\"3\"\u003e\n\u003cp\u003e\u003cspan\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2mm+\/-0.05mm for 1.25”, 2” mounted, Dia31mm and Dia36mm unmounted\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e3mm+\/-0.05mm for Dia50mm and square 50x50mm unmounted\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThe main features and app\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003eli\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003ecation\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eHigh transmittance Ha\/SII\/OIII＞90% and \u003c\/span\u003e\u003cspan\u003e3nm \u003c\/span\u003e\u003cspan\u003ebandwidth to maximize contrast\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- Antlia narrowband Pro High-speed filters can be used with focal ratio f\/2.6-f3.6 systems with minimal loss of signal\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eImproved sharp cut-off astrophotography 3nm Pro series filters are designed to minimize halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eThe out of band blocking specification is rated OD5 (0.001%) which delivers an excellent SNR(signal to noise ratio) and effective cut-off rate to minimize interference from other wavelengths\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eA single substrate to eliminate internal reflections\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eNarrowband Objects: Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eUse in light polluted areas and dark sites\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eExtends imaging time when the moon is up\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eAll Antlia unmounted narrowband High-speed filters are edge blackened to eliminate internal reflections from stray light\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eSuperior optical reliability reduces post image processing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eBasic Substrate: Optical, Single \/ Non-glued substrate\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eSurface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eTransmitted Wavefront: Lambda\/4 or better.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eParallelism: less than 30 arc sec\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- \u003c\/span\u003e\u003cspan\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFilter Ring:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAntlia standard ring:1.25\u003c\/span\u003e\u003cspan\u003e’’\u003c\/span\u003e\u003cspan\u003e (M28.5*0.6)，2\u003c\/span\u003e\u003cspan\u003e’’\u003c\/span\u003e\u003cspan\u003e(M48*0.75)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBlack Anodized Finish\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLaser Engraving No Fading\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNot Recommended:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSolar imaging\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNight visual observation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNot Permitted:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSerious eye damage will result if you\u003c\/span\u003e\u003cspan\u003e fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSpectrum Curves:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ABUIABAEGAAg76yMpwYonMj9-QUwuBA4sAk.png?v=1765043478\" width=\"2104\" height=\"1200\" alt=\"OIII 3nm Pro High-speed Spectrum.png\" class=\"need_fix\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ABUIABAEGAAg8ayMpwYo8avy5gMwuBA4sAk.png?v=1765043481\" width=\"2104\" height=\"1200\" alt=\"SII 3nm Pro High-speed Spectrum.png\" class=\"need_fix\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/ABUIABAEGAAgh62MpwYoxN-nAzC4EDiwCQ.png?v=1765043485\" width=\"2104\" height=\"1200\" alt=\"Ha 3nm Pro High-speed Spectrum.png\" class=\"need_fix\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"Antlia","offers":[{"title":"H-Alpha","offer_id":45684629635291,"sku":"ANT-3NM-HIGHSPEED-2\"-HA","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"SII","offer_id":45684629668059,"sku":"ANT-3NM-HIGHSPEED-2\"-SII","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"OIII","offer_id":45684629700827,"sku":"ANT-3NM-HIGHSPEED-2\"-OIII","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"Complete Set (Ha+SII+OIII)","offer_id":45684629733595,"sku":"ANT-3NM-HIGHSPEED-2\"-SET","price":1764.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/antlia-filter-antlia-ha-sii-and-oiii-3nm-pro-highspeed-filter-2-mounted-41429347172571.jpg?v=1717514761","url":"https:\/\/telescopescanada.ca\/products\/antlia-ha-sii-and-oiii-3nm-pro-highspeed-filter-2-mounted","provider":"Telescopes Canada","version":"1.0","type":"link"}