{"product_id":"filtro-idas-ngs1-2-pollici","title":"IDAS NGS1 Filter 2\"","description":"\u003ch2\u003eRound 2\" filter against light pollution and airglow\u003c\/h2\u003e\u003cp\u003e2\" ring-mounted version of the IDAS NGS1 filter, from the LPS-D3 series. It selectively attenuates artificial stray light sources without significantly altering the color balance of broadband objects like galaxies and star clusters, delivering a more natural photographic result than narrowband filters.\u003c\/p\u003e\u003ch3\u003eA filter that also fights the sky's natural glow\u003c\/h3\u003e\u003cp\u003eThe NGS1 also reduces airglow, the faint atmospheric glow generated by the recombination of oxygen and nitrogen molecules after exposure to solar ultraviolet rays. This effect is particularly evident in long-exposure shots taken from high-altitude sites under very dark skies, where the NGS1 filter helps preserve nebula contrast.\u003c\/p\u003e\u003ch3\u003eDesigned for fast optics\u003c\/h3\u003e\u003cp\u003eThanks to IGAD coating technology, the transmission curve remains stable even at the wide angles of incidence typical of very fast photographic optics, avoiding the spectral shifts typical of traditional coatings.\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\u003eTransmission\u003c\/td\u003e\u003ctd\u003e97%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGlass thickness\u003c\/td\u003e\u003ctd\u003e2.5 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount\u003c\/td\u003e\u003ctd\u003e2\" ring\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount material\u003c\/td\u003e\u003ctd\u003eAluminium\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eTelescope connection\u003c\/td\u003e\u003ctd\u003e2\"\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\u003eConstruction type\u003c\/td\u003e\u003ctd\u003eCLS broadband filter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eLPS-D3\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\u003eLight pollution reduction\u003c\/td\u003e\u003ctd\u003eYes\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\u003eVisual use\u003c\/td\u003e\u003ctd\u003eNo (photographic only)\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSuitable for astrophotography with telescopes fitted with a 2\" focuser, in contexts with urban or suburban light pollution. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887853707595,"sku":"ID62321","price":239.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/IDAS-Filtro-NGS1-2.jpg?v=1784306923","url":"https:\/\/adriasky.it\/en\/products\/idas-ngs1-filter-2-inch","provider":"Adriasky","version":"1.0","type":"link"}