{"product_id":"baader-set-filtri-highspeed-f2-6-5nm-2-sho","title":"Baader Highspeed f\/2 Filter Set 6.5nm 2\" (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader Highspeed f\/2 Filter Set 6.5nm 2\" (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the version of the CMOS-Optimized range designed specifically for ultra-fast astrographs such as the Celestron RASA and Hyperstar, where traditional narrowband filters lose transmission drastically due to the strong center wavelength shift (CWL-shift).\u003c\/p\u003e\n\n\u003ch2\u003eDesigned for fast optics\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter, an \u003cstrong\u003eO-III\u003c\/strong\u003e filter and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter, all with a 6.5nm FWHM bandwidth, but with a \u003cstrong\u003ecenter wavelength pre-shift (CWL-preshift)\u003c\/strong\u003e specifically calibrated to match optical systems from f\/3.4 to f\/1.8. In extremely fast optical trains, standard narrowband filters risk having the CWL shift out of the passband itself; these Highspeed filters solve this problem, delivering maximum contrast even at these extreme apertures.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eEach filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not peel, degrade, and lasts the entire life of the filter even in the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. Each filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eFilters included\u003c\/td\u003e\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\u003ctd\u003e6.5 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFormat\u003c\/td\u003e\u003ctd\u003e2\" (50.8mm), M48 thread\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\u003ctd\u003ef\/3.4 to f\/1.8 (ultra-fast astrographs)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter thickness\u003c\/td\u003e\u003ctd\u003e2 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCoating\u003c\/td\u003e\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eEssential for astrophotographers using ultra-fast astrographs like the Celestron RASA, Hyperstar systems, or other optical trains between f\/1.8 and f\/3.5, where regular narrowband filters would not guarantee full transmission. Enables truly effective use of fast optics for high-contrast imaging of emission nebulae in the \"Hubble Palette\" style (SHO) for the first time.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"Default Title","offer_id":57946625638731,"sku":"BRBP2961663","price":741.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/Baader-Filters-H-alpha-OIII-SII-CMOS-f-2-Highspeed-2_26eb928f-3605-49d5-a175-3c4b16a07680.jpg?v=1785072714","url":"https:\/\/adriasky.it\/en\/products\/baader-highspeed-f2-filter-set-6-5nm-2-sho","provider":"Adriasky","version":"1.0","type":"link"}