{"product_id":"baader-filtro-solare-astrosolar-astf-clearwhite-od-5-1-180mm-telescopi","title":"Baader AstroSolar ASTF ClearWhite OD 5.1 180mm Solar Filter for Telescopes","description":"\u003cp\u003e\u003cstrong\u003eThe Baader ASTF ClearWhite OD 5.1 Solar Filter for telescopes, aperture 180mm\u003c\/strong\u003e, belongs to the ASTF series (AstroSolar Telescope Filter), designed for medium to large high-end telescopes: a very good telescope deserves a very good filter!\u003c\/p\u003e\n\n\u003ch2\u003eAstroSolar ClearWhite OD 5.1 Film\u003c\/h2\u003e\n\u003cp\u003eThe filter uses the Baader AstroSolar® ClearWhite Safety Film OD 5.1, metallized on both sides, designed for direct observation of the Sun and for building front-mounted filters for telescopes, binoculars, spotting scopes and telephoto lenses.\u003c\/p\u003e\n\u003cp\u003eWith an optical density of OD 5.1, the film reduces the intensity of sunlight by approximately 99.9992% (attenuation factor of approximately 125,000), compliant with the transmittance requirements of the EN ISO 12312-2:2015 standard for filters intended for direct observation of the Sun. Compared to the previous OD 5.0 version, the ClearWhite offers an even whiter, more neutral image of the Sun with a slightly higher optical density: sunspots, granulation and fine details of the photosphere appear sharp and high-contrast.\u003c\/p\u003e\n\u003cp\u003eThe film, free of streaks and bubbles, achieves at a thickness of just 0.012mm an optical quality comparable to that of the best plane-parallel glass filters. The double-sided coating ensures a particularly uniform filtering action.\u003c\/p\u003e\n\n\u003ch2\u003eTemperature-compensated cell\u003c\/h2\u003e\n\u003cp\u003eThe film is mounted stress-free in a temperature-compensated cell, which maintains optical quality unchanged across different usage temperatures, without generating astigmatism during winter observations or with summer temperature changes. The aluminum mount has a white front ring that reflects heat, with raised edges that protect the film from contact with sharp metal surfaces.\u003c\/p\u003e\n\u003cp\u003eIncluded: two sets of centering bolts (10mm and 20mm diameter, 38mm length) to fit the diameter of your optical tube or dew shield, three safety straps with adhesive pads and three rubber plugs to cover unused holes, plus mounting instructions.\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\u003eSeries\u003c\/td\u003e\u003ctd\u003eASTF (AstroSolar Telescope Filter)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilm\u003c\/td\u003e\u003ctd\u003eAstroSolar® ClearWhite Safety Film OD 5.1\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUsable aperture\u003c\/td\u003e\u003ctd\u003e180 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eAttenuation\u003c\/td\u003e\u003ctd\u003e~99.9992% (factor ~125,000)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eStandard\u003c\/td\u003e\u003ctd\u003eEN ISO 12312-2:2015\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount\u003c\/td\u003e\u003ctd\u003eAluminum, temperature-compensated cell\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\u003eIdeal for amateur astronomers and astrophotographers who own a high-end telescope and are looking for the highest optical quality for visual observation and photography of the Sun in white light, both for daily monitoring of sunspots and for the partial phases of solar eclipses.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"Default Title","offer_id":57970246713675,"sku":"BRBP2423015","price":176.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/Baader-AstroSolar-ClearWhite-ASTF-80mm_ff24766a-2e31-40c4-837a-0dae3f5460eb.jpg?v=1785274622","url":"https:\/\/adriasky.it\/en\/products\/baader-astrosolar-astf-clearwhite-od-5-1-180mm-telescopes","provider":"Adriasky","version":"1.0","type":"link"}