{"product_id":"antlia-filtro-oiii-4-5nm-edge-50mm","title":"Antlia OIII 4.5nm EDGE Filter 50mm","description":"\u003ch2\u003eAntlia OIII 4.5nm EDGE Filter 50mm – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia OIII EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission and planetary nebulae. Centered on the OIII line at \u003cstrong\u003e500.7nm\u003c\/strong\u003e, it combines the 4.5nm bandwidth with the excellent transmission characteristics of the PRO 3nm series, guaranteeing a higher signal-to-noise ratio than conventional broader narrowband filters, which suffer heavy transmission loss due to center wavelength (CWL) shift.\u003c\/p\u003e\n\u003cp\u003eThanks to OD5 (0.001%) blocking on unwanted wavelengths, Antlia guarantees transmission above 85% within 1nm of the center band, making this filter suitable for both long focal ratios and fast optical systems down to f\/3, with minimal signal loss. The unmounted 50mm format, with increased 3mm thickness for flatness over larger surfaces, is designed for large-format filter drawers and filter wheels.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e4.5nm\u003c\/strong\u003e bandpass (FWHM), centered at 500.7nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;85%\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eOut-of-band blocking \u003cstrong\u003eOD5 (0.001%)\u003c\/strong\u003e from 300 to 1000nm\u003c\/li\u003e\n\u003cli\u003eUsable down to \u003cstrong\u003ef\/3\u003c\/strong\u003e with minimal signal loss\u003c\/li\u003e\n\u003cli\u003eMonolithic, non-glued Schott substrate, hand-blackened edges\u003c\/li\u003e\n\u003cli\u003e50mm unmounted format, 3mm thickness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFilter type\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eUltra-narrow band OIII EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e500.7nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eBandpass (FWHM)\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e4.5nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003ePeak transmission\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e\u0026gt;85%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOut-of-band blocking\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eOD5 (0.001%) @ 300-1000nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e50mm (unmounted)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 3mm ±0.05mm thickness\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSurface quality\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e60\/40 (MIL-O-13830)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eTransmitted wavefront\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eλ\/4 or better\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e\u0026lt;30 arcsec\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e3 years against delamination\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended use\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDeep-sky imaging on large-format filter wheels\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAs the OIII component of the SHO EDGE set, this filter is ideal for high-contrast imaging of emission nebulae, supernova remnants and planetary nebulae, offering better performance than the previous PRO 3nm generation thanks to its improved balance between bandwidth and transmission.\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":58530674573643,"sku":"ANA-OIII-EDGE-50","price":429.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-45nm-oiii-edge-50mm-antlia.jpg?v=1789992865","url":"https:\/\/adriasky.it\/en\/products\/antlia-oiii-4-5nm-edge-filter-50mm-en","provider":"Adriasky","version":"1.0","type":"link"}