{"product_id":"baader-set-filtri-ultra-highspeed-f2-3-5-4nm-sho","title":"Baader f\/2 Ultra-Highspeed Filter Set 3.5\/4nm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader f\/2 Ultra-Highspeed Filter Set 3.5\/4nm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e combines the central wavelength pre-shift of the Highspeed range with the ultra-narrow passband of the Ultra-Narrowband range, for the absolute maximum contrast on ultra-fast astrographs such as Celestron RASA and Hyperstar.\u003c\/p\u003e\n\n\u003ch2\u003eThe best of both technologies\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, with an ultra-narrow 3.5\/4nm FWHM passband and a \u003cstrong\u003eCWL pre-shift\u003c\/strong\u003e specifically calibrated for optical systems from f\/3.4 to f\/1.8. The narrower passband allows for the maximum possible contrast even under heavily light-polluted skies (Bortle 9\/8\/7\/6), further reducing the apparent size of stars and revealing the finest nebula details — even at the most 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 flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e3.5 \/ 4 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/3.4 to f\/1.8 (ultra-fast astrographs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eThe ultimate set for astrophotographers using ultra-fast astrographs such as Celestron RASA or Hyperstar systems who want the absolute maximum contrast available, even under heavily light-polluted skies, for high-contrast imaging of emission nebulae in \"Hubble Palette\" style (SHO).\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":57946653425995,"sku":"BRBP2961680","price":790.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58171620917579,"sku":"BRBP2961683","price":1183.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58171620950347,"sku":"BRBP2961681","price":839.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58171620983115,"sku":"BRBP2961682","price":1005.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58171621015883,"sku":"BRBP2961684","price":1279.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58171621048651,"sku":"BRBP2961685","price":1364.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58171621081419,"sku":"BRBP2961686","price":1790.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-set-filtri-ultra-highspeed-f2-35-4nm-114pollice.jpg?v=1787058402","url":"https:\/\/adriasky.it\/en\/products\/baader-f2-ultra-highspeed-filter-set-3-5-4nm-sho","provider":"Adriasky","version":"1.0","type":"link"}