{"product_id":"baader-set-filtri-ultra-highspeed-f2-3-5-4nm-2-sho","title":"Baader Ultra-Highspeed f\/2 Filter Set 3.5\/4nm 2\" (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader Ultra-Highspeed f\/2 Filter Set 3.5\/4nm 2\" (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e combines the center wavelength pre-shift of the Highspeed range with the ultra-narrow bandwidth of the Ultra-Narrowband range, for the absolute maximum contrast on ultra-fast astrographs such as the 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 bandwidth of 3.5\/4nm FWHM and \u003cstrong\u003eCWL pre-shift\u003c\/strong\u003e, specifically calibrated for optical systems from f\/3.4 to f\/1.8. The narrower bandwidth allows the maximum possible contrast even under strongly light-polluted skies (Bortle 9\/8\/7\/6), further reducing apparent star size 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 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.\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\u003e3.5 \/ 4 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\u003eThe ultimate set for astrophotographers using ultra-fast astrographs like the Celestron RASA or Hyperstar systems who want the absolute maximum contrast available, even under strongly light-polluted skies, for high-contrast imaging of emission nebulae in the \"Hubble Palette\" style (SHO).\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"Default Title","offer_id":57946653917515,"sku":"BRBP2961683","price":1183.0,"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-Ultra-Highspeed-2_ce6d223d-fd2f-4eaf-a33a-015718fb5883.jpg?v=1785073388","url":"https:\/\/adriasky.it\/en\/products\/baader-ultra-highspeed-f2-filter-set-3-5-4nm-2-sho","provider":"Adriasky","version":"1.0","type":"link"}