{"product_id":"filtro-idas-nbz-ii-m52","title":"IDAS NBZ-II Filter M52","description":"\u003ch2\u003eA dual-band filter for narrowband imaging in a single session\u003c\/h2\u003e\u003cp\u003eThe IDAS NBZ-II filter simultaneously transmits the red H-alpha line and the blue-green OIII lines, increasing the contrast of emission nebulae and allowing narrowband images to be obtained with just one series of exposures, without needing to alternate between multiple single-band filters. This M52 threaded-mount version is designed for direct installation on astronomy cameras and filter wheels with a threaded connection, a more compact alternative to the 2\" ring version.\u003c\/p\u003e\u003ch3\u003eDesigned to work well even with very fast optics\u003c\/h3\u003e\u003cp\u003eThe filter is compatible with telescopes and photographic lenses down to f\/1.4, making it usable on virtually any standard optic and most fast photographic lenses. The 10nm bandwidth for H-alpha and 8nm for OIII is slightly wider than the 7nm dual-band filters of other manufacturers: this extra margin avoids the severe transmission loss (sometimes over 50%) that occurs with narrower filters when used on very fast optics (around f\/2), making the NBZ-II suitable for both slow and fast systems without needing to change filters.\u003c\/p\u003e\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eH-alpha bandwidth\u003c\/td\u003e\u003ctd\u003e10 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOIII bandwidth\u003c\/td\u003e\u003ctd\u003e8 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter thickness\u003c\/td\u003e\u003ctd\u003e2.0 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount\u003c\/td\u003e\u003ctd\u003eM52 thread\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eMulti-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptics compatibility\u003c\/td\u003e\u003ctd\u003eDown to f\/2 (also usable on slower systems)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eInfrared blocking\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePhotographic use\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eVisual use\u003c\/td\u003e\u003ctd\u003eNo (photographic only)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for nebulae and galaxies\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for double stars\u003c\/td\u003e\u003ctd\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for Moon and planets\u003c\/td\u003e\u003ctd\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSuitable for narrowband astrophotography of planetary nebulae, emission nebulae and supernova remnants with cameras or filter wheels with an M52 connection, particularly for those using fast astrographs who don't want to give up a universal filter that also works on slower systems. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887917506891,"sku":"ID90932","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/IDAS-Filtro-NBZ-II-O-III-H-alpha-M52.jpg?v=1784306481","url":"https:\/\/adriasky.it\/en\/products\/idas-nbz-ii-filter-m52-en","provider":"Adriasky","version":"1.0","type":"link"}