{"title":"Antlia","description":"\u003ch2\u003eAntlia: Ultra-Narrowband Filters for Deep-Sky Astrophotography\u003c\/h2\u003e\u003cp\u003eAntlia is a Chinese brand specialising in the production of high-precision astronomical filters for deep-sky imaging. Born from a community of professional and enthusiast astrophotographers, Antlia stands out for its ultra-narrow passbands — among the most selective available on the market — with transmission curves measured and certified for each production batch. Antlia filters are designed to maximise the contrast of emission nebulae even from the most light-polluted skies, compatible with any mono or colour CMOS camera.\u003c\/p\u003e\u003ch2\u003eMono-Band, L-RGB, Dual Band and Triband for Every Setup\u003c\/h2\u003e\u003cp\u003eThe Antlia range covers all the main requirements of narrowband astrophotography. The \u003cstrong\u003emono-band H-Alpha, OIII and SII filters\u003c\/strong\u003e with passbands of 3 and 3.5 nm ensure near-total isolation of nebular emission lines, eliminating stellar continuum and light pollution — ideal for HOO and SHO imaging (Hubble palette) with mono cameras. The \u003cstrong\u003edual-band and triband filters\u003c\/strong\u003e allow capture of multiple emission lines in a single exposure, making them the ideal solution for OSC colour cameras. The \u003cstrong\u003eL-RGB\u003c\/strong\u003e sets complete the kit for colour imaging with monochrome cameras. Filters are available in the most common formats for telescopes and astronomical cameras.\u003c\/p\u003e\u003cp\u003eShop Antlia filters at Adriasky with fast shipping to Italy and across Europe. Specialist technical support and official warranty on all products.\u003c\/p\u003e","products":[{"product_id":"antlia-filtro-rgb-triband-2","title":"Antlia RGB Triband 2” Filter","description":"\u003ch2\u003eAntlia RGB Triband 2” – Triple Band Filter for Color CMOS Astrophotography\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia RGB Triband 2”\u003c\/strong\u003e is a \u003cstrong\u003etriple band filter\u003c\/strong\u003e with three transmission windows on \u003cstrong\u003eH-Alpha (656.3nm)\u003c\/strong\u003e, \u003cstrong\u003eOIII (495.9\/500.7nm)\u003c\/strong\u003e, \u003cstrong\u003eSII (671.6\/672.4nm)\u003c\/strong\u003e and \u003cstrong\u003eNII (654.8\/658.3nm)\u003c\/strong\u003e. Transmission \u0026gt;92% per band, peak up to 97%. 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Centered on the H-Alpha line at \u003cstrong\u003e656.3nm\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 90% 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. 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Centered on the H-Alpha line at \u003cstrong\u003e656.3nm\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 90% 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 monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating also ensures a steep spectral profile that minimizes halos around bright stars.\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 656.3nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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\u003c\/li\u003e\n\u003cli\u003e2\" mount (M48x0.75), black anodized finish\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 H-Alpha EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e656.3nm\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;90%\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\u003e2\" (mounted, M48x0.75)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAs the H-Alpha 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":58530466038091,"sku":"ANA-HA-EDGE-2","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-45nm-h-alpha-edge-508mm-antlia.jpg?v=1789993438"},{"product_id":"antlia-filtro-h-alpha-4-5nm-edge-36mm","title":"Antlia H-Alpha 4.5nm EDGE Filter 36mm","description":"\u003ch2\u003eAntlia H-Alpha 4.5nm EDGE Filter 36mm – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia H-Alpha EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission nebulae. Centered on the H-Alpha line at \u003cstrong\u003e656.3nm\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 90% 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 36mm format is designed for modern filter wheels and filter drawers, with hand-blackened edges to eliminate stray light.\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 656.3nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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\u003e36mm unmounted format, for filter wheels\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 H-Alpha EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e656.3nm\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;90%\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\u003e36mm (unmounted)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras, filter wheels\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAs the H-Alpha 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":58530470822219,"sku":"ANA-HA-EDGE-36","price":279.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/antlia-filtro-h-alpha-3-5nm-36mm-contrastato-inquinamento-luminoso_1e3a74ff-649f-42b2-83ed-a950f639a59c.jpg?v=1789825082"},{"product_id":"antlia-filtro-h-alpha-4-5nm-edge-50mm","title":"Antlia H-Alpha 4.5nm EDGE Filter 50mm","description":"\u003ch2\u003eAntlia H-Alpha 4.5nm EDGE Filter 50mm – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia H-Alpha EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission nebulae. Centered on the H-Alpha line at \u003cstrong\u003e656.3nm\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 90% 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 656.3nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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 H-Alpha EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e656.3nm\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;90%\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 H-Alpha 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":58530480587083,"sku":"ANA-HA-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-h-alpha-edge-50mm-antlia.jpg?v=1789993328"},{"product_id":"antlia-filtro-oiii-4-5nm-edge-125","title":"Antlia OIII 4.5nm EDGE Filter 1.25\"","description":"\u003ch2\u003eAntlia OIII 4.5nm EDGE Filter 1.25\" – 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 monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating also ensures a steep spectral profile that minimizes halos around bright stars.\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\u003c\/li\u003e\n\u003cli\u003e1.25\" mount (M28.5x0.6), black anodized finish\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\u003e1.25\" (mounted, M28.5x0.6)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras\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":58530586722635,"sku":"ANA-OIII-EDGE-1","price":225.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/antlia-filtro-oiii-4-5nm-edge-125-narrowband.jpg?v=1789825843"},{"product_id":"antlia-filtro-oiii-4-5nm-edge-2","title":"Antlia OIII 4.5nm EDGE Filter 2\"","description":"\u003ch2\u003eAntlia OIII 4.5nm EDGE Filter 2\" – 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 monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating also ensures a steep spectral profile that minimizes halos around bright stars.\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\u003c\/li\u003e\n\u003cli\u003e2\" mount (M48x0.75), black anodized finish\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\u003e2\" (mounted, M48x0.75)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras\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":58530597044555,"sku":"ANA-OIII-EDGE-2","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-45nm-oiii-edge-508mm-antlia.jpg?v=1789993186"},{"product_id":"antlia-filtro-oiii-4-5nm-edge-36mm","title":"Antlia OIII 4.5nm EDGE Filter 36mm","description":"\u003ch2\u003eAntlia OIII 4.5nm EDGE Filter 36mm – 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 36mm format is designed for modern filter wheels and filter drawers, with hand-blackened edges to eliminate stray light.\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\u003e36mm unmounted format, for filter wheels\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\u003e36mm (unmounted)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras, 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":58530655371595,"sku":"ANA-OIII-EDGE-36","price":279.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-45nm-oiii-edge-50mm-antlia_7002a957-9aa5-4215-8522-aaac5c24037d.jpg?v=1789992923"},{"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"},{"product_id":"antlia-filtro-sii-4-5nm-edge-125","title":"Antlia SII 4.5nm EDGE Filter 1.25\"","description":"\u003ch2\u003eAntlia SII 4.5nm EDGE Filter 1.25\" – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia SII EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission nebulae. Centered on the SII line at \u003cstrong\u003e672.4nm\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 90% 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 monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating also ensures a steep spectral profile that minimizes halos around bright stars.\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 672.4nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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\u003c\/li\u003e\n\u003cli\u003e1.25\" mount (M28.5x0.6), black anodized finish\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 SII EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e672.4nm\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;90%\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\u003e1.25\" (mounted, M28.5x0.6)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAs the SII 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":58532479631691,"sku":"ANA-SII-EDGE-1","price":225.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/antlia-filtro-sii-4-5nm-edge-125-narrowband.jpg?v=1789852269"},{"product_id":"antlia-filtro-sii-4-5nm-edge-2","title":"Antlia SII 4.5nm EDGE Filter 2\"","description":"\u003ch2\u003eAntlia SII 4.5nm EDGE Filter 2\" – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia SII EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission nebulae. Centered on the SII line at \u003cstrong\u003e672.4nm\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 90% 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 monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating also ensures a steep spectral profile that minimizes halos around bright stars.\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 672.4nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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\u003c\/li\u003e\n\u003cli\u003e2\" mount (M48x0.75), black anodized finish\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 SII EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e672.4nm\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;90%\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\u003e2\" (mounted, M48x0.75)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAs the SII 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":58532484579659,"sku":"ANA-SII-EDGE-2","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-45nm-sii-edge-508mm-antlia.jpg?v=1789992692"},{"product_id":"antlia-filtro-sii-4-5nm-edge-36mm","title":"Antlia SII 4.5nm EDGE Filter 36mm","description":"\u003ch2\u003eAntlia SII 4.5nm EDGE Filter 36mm – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia SII EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission nebulae. Centered on the SII line at \u003cstrong\u003e672.4nm\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 90% 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 36mm format is designed for modern filter wheels and filter drawers, with hand-blackened edges to eliminate stray light.\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 672.4nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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\u003e36mm unmounted format, for filter wheels\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 SII EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e672.4nm\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;90%\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\u003e36mm (unmounted)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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 with mono or color CCD\/CMOS cameras, filter wheels\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAs the SII 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":58532486906187,"sku":"ANA-SII-EDGE-36","price":279.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-45nm-sii-edge-50mm-antlia_4225bad3-00cd-47ec-969f-2679e41af8ca.jpg?v=1789992630"},{"product_id":"antlia-filtro-sii-4-5nm-edge-50mm","title":"Antlia SII 4.5nm EDGE Filter 50mm","description":"\u003ch2\u003eAntlia SII 4.5nm EDGE Filter 50mm – Ultra-Narrow Band with High Transmission\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia SII EDGE 4.5nm filter\u003c\/strong\u003e is an ultra-narrow band filter designed to maximize contrast when imaging emission nebulae. Centered on the SII line at \u003cstrong\u003e672.4nm\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 90% 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 672.4nm\u003c\/li\u003e\n\u003cli\u003ePeak transmission \u003cstrong\u003e\u0026gt;90%\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 SII EDGE\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e672.4nm\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;90%\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 SII 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":58532493361483,"sku":"ANA-SII-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-sii-edge-50mm-antlia.jpg?v=1789992477"},{"product_id":"antlia-filtro-h-alpha-3-5nm-125","title":"Antlia H-Alpha 3.5nm Filter 1.25\"","description":"\u003ch2\u003eAntlia H-Alpha 3.5nm Filter 1.25\" – Ultra-Narrow Band for Astrophotography\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia H-Alpha 3.5nm filter\u003c\/strong\u003e is an \u003cstrong\u003eultra-narrow band filter\u003c\/strong\u003e centered on the ionized hydrogen emission line at \u003cstrong\u003e656.3nm\u003c\/strong\u003e, with a bandwidth of just \u003cstrong\u003e3.5nm\u003c\/strong\u003e. It guarantees transmission above \u003cstrong\u003e88%\u003c\/strong\u003e on the H-Alpha line and out-of-band blocking of OD3 (0.1%) from 300 to 1100nm, for maximum contrast even under heavy light pollution and during moonlit nights.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for \u003cstrong\u003enew-generation CMOS cameras\u003c\/strong\u003e and fast telescopes down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e, the filter uses a monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating. The edge is hand-blackened – a distinctive feature of Antlia's build quality – to completely eliminate stray light and halos around bright stars.\u003c\/p\u003e\n\u003cp\u003eThe H-Alpha component of the \u003cstrong\u003eSHO set\u003c\/strong\u003e (H-Alpha + OIII + SII), it enables high-contrast imaging of emission nebulae, supernova remnants and planetary nebulae, with the option to enrich RGB images with the H-Alpha channel for greater structural definition.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3.5nm\u003c\/strong\u003e bandpass – maximum contrast and light pollution suppression\u003c\/li\u003e\n\u003cli\u003eTransmission \u003cstrong\u003e\u0026gt;88%\u003c\/strong\u003e on the H-Alpha line at 656.3nm\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOD3 (0.1%)\u003c\/strong\u003e blocking from 300 to 1100nm\u003c\/li\u003e\n\u003cli\u003eMonolithic, non-glued Schott substrate, parallel ±0.05mm\u003c\/li\u003e\n\u003cli\u003eHand-blackened edges to eliminate stray light and halos\u003c\/li\u003e\n\u003cli\u003e1.25\" mount (M28.5x0.6), compatible down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e\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 H-Alpha\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e656.3nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eBandpass (FWHM)\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e3.5nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eH-Alpha transmission\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e\u0026gt;88%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOut-of-band blocking\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eOD3 (0.1%) @ 300–1100nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1.25\" (mounted, M28.5x0.6)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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\u003eFlatness\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1\/4λ\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e30\"\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCoating\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMulti-layer nano-coating, double-sided\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDown to f\/2.0\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended use\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMono CCD\/CMOS, SHO imaging, emission nebulae\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":58534325715275,"sku":"ANA-HA-1","price":339.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-3nm-h-alpha-pro-508mm-antlia-filters.jpg?v=1789992172"},{"product_id":"antlia-filtro-h-alpha-3-5nm-2","title":"Antlia H-Alpha 3.5nm Filter 2\"","description":"\u003ch2\u003eAntlia H-Alpha 3.5nm Filter 2\" – Ultra-Narrow Band for Astrophotography\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia H-Alpha 3.5nm filter\u003c\/strong\u003e is an \u003cstrong\u003eultra-narrow band filter\u003c\/strong\u003e centered on the ionized hydrogen emission line at \u003cstrong\u003e656.3nm\u003c\/strong\u003e, with a bandwidth of just \u003cstrong\u003e3.5nm\u003c\/strong\u003e. It guarantees transmission above \u003cstrong\u003e88%\u003c\/strong\u003e on the H-Alpha line and out-of-band blocking of OD3 (0.1%) from 300 to 1100nm, for maximum contrast even under heavy light pollution and during moonlit nights.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for \u003cstrong\u003enew-generation CMOS cameras\u003c\/strong\u003e and fast telescopes down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e, the filter uses a monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating. The edge is hand-blackened – a distinctive feature of Antlia's build quality – to completely eliminate stray light and halos around bright stars.\u003c\/p\u003e\n\u003cp\u003eThe H-Alpha component of the \u003cstrong\u003eSHO set\u003c\/strong\u003e (H-Alpha + OIII + SII), it enables high-contrast imaging of emission nebulae, supernova remnants and planetary nebulae, with the option to enrich RGB images with the H-Alpha channel for greater structural definition.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3.5nm\u003c\/strong\u003e bandpass – maximum contrast and light pollution suppression\u003c\/li\u003e\n\u003cli\u003eTransmission \u003cstrong\u003e\u0026gt;88%\u003c\/strong\u003e on the H-Alpha line at 656.3nm\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOD3 (0.1%)\u003c\/strong\u003e blocking from 300 to 1100nm\u003c\/li\u003e\n\u003cli\u003eMonolithic, non-glued Schott substrate, parallel ±0.05mm\u003c\/li\u003e\n\u003cli\u003eHand-blackened edges to eliminate stray light and halos\u003c\/li\u003e\n\u003cli\u003e2\" mount (M48x0.75), compatible down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e\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 H-Alpha\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCenter wavelength\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e656.3nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eBandpass (FWHM)\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e3.5nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eH-Alpha transmission\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e\u0026gt;88%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOut-of-band blocking\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eOD3 (0.1%) @ 300–1100nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e2\" (mounted, M48x0.75)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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\u003eFlatness\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1\/4λ\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e30\"\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCoating\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMulti-layer nano-coating, double-sided\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDown to f\/2.0\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended use\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMono CCD\/CMOS, SHO imaging, emission nebulae\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":58534348063051,"sku":"ANA-HA-2","price":559.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/ABUIABACGAAgo7vF8QUowL7lDTCgBjigBg.jpg?v=1789992081"},{"product_id":"antlia-filtro-h-alpha-3-5nm-50mm","title":"Antlia H-Alpha 3.5nm Filter 50mm","description":"\u003ch2\u003eAntlia H-Alpha 3.5nm Filter 50mm – Ultra-Narrow Band for Astrophotography\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia H-Alpha 3.5nm filter\u003c\/strong\u003e is an \u003cstrong\u003eultra-narrow band filter\u003c\/strong\u003e centered on the ionized hydrogen emission line at \u003cstrong\u003e656.3nm\u003c\/strong\u003e, with a bandwidth of just \u003cstrong\u003e3.5nm\u003c\/strong\u003e. It guarantees transmission above \u003cstrong\u003e88%\u003c\/strong\u003e on the H-Alpha line and out-of-band blocking of OD3 (0.1%) from 300 to 1100nm, for maximum contrast even under heavy light pollution and during moonlit nights.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for \u003cstrong\u003enew-generation CMOS cameras\u003c\/strong\u003e and fast telescopes down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e, the filter uses a monolithic, non-glued Schott substrate with double-sided polishing and multi-layer nano-coating. 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The extremely narrow bandwidth guarantees transmission above \u003cstrong\u003e88%\u003c\/strong\u003e on the OIII line and out-of-band blocking of OD3 (0.1%) from 300 to 1100nm, ideal for shooting under heavy light pollution and during moonlit nights.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for \u003cstrong\u003enew-generation CMOS cameras\u003c\/strong\u003e and fast telescopes down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e, the filter uses a monolithic, non-glued Schott substrate with double-sided polishing, multi-layer nano-coating and hand-blackened edges to eliminate reflections and halos.\u003c\/p\u003e\n\u003cp\u003eAn essential OIII component of the \u003cstrong\u003eSHO set\u003c\/strong\u003e (H-Alpha + OIII + SII), it enables high-contrast imaging of planetary nebulae, supernova remnants and emission nebulae in the \u003cstrong\u003eHubble Palette\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3.5nm\u003c\/strong\u003e bandpass – maximum contrast and light pollution suppression\u003c\/li\u003e\n\u003cli\u003eTransmission \u003cstrong\u003e\u0026gt;88%\u003c\/strong\u003e on the OIII line at 500.7nm\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOD3 (0.1%)\u003c\/strong\u003e blocking from 300 to 1100nm\u003c\/li\u003e\n\u003cli\u003eMonolithic, non-glued Schott substrate, parallel ±0.05mm\u003c\/li\u003e\n\u003cli\u003eHand-blackened edges to eliminate stray light and halos\u003c\/li\u003e\n\u003cli\u003e1.25\" mount (M28.5x0.6), compatible down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e\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\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\u003e3.5nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOIII transmission\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e\u0026gt;88%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOut-of-band blocking\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eOD3 (0.1%) @ 300–1100nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1.25\" (mounted, M28.5x0.6)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott, 2mm ±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\u003eFlatness\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1\/4λ\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e30\"\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCoating\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMulti-layer nano-coating, double-sided\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDown to f\/2.0\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended use\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMono CCD\/CMOS, SHO imaging, planetary nebulae\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":58534540083531,"sku":"ANA-OIII-1","price":399.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/ABUIABACGAAgr-bovwYo6tSe2AYw6Ac46Ac.jpg?v=1789991906"},{"product_id":"antlia-filtro-oiii-3-5nm-2","title":"Antlia OIII 3.5nm Filter 2\"","description":"\u003ch2\u003eAntlia OIII 3.5nm Filter 2\" – Ultra-Narrow Band for Astrophotography\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia OIII 3.5nm filter\u003c\/strong\u003e is an \u003cstrong\u003eultra-narrow band filter\u003c\/strong\u003e centered on the doubly ionized oxygen emission line at \u003cstrong\u003e500.7nm\u003c\/strong\u003e, with a bandwidth of just \u003cstrong\u003e3.5nm\u003c\/strong\u003e. 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Each filter is made on a monolithic, non-glued optical glass substrate with double-sided multi-layer nano-coating and hand-blackened edges to eliminate stray light.\u003c\/p\u003e\n\u003cp\u003eThe kit's spectral separation is optimized for a near \u003cstrong\u003e1:1:1\u003c\/strong\u003e RGB ratio – with a difference within 10% – allowing balanced exposures across the three channels without complex post-processing compensation. OIII emissions overlap the green and blue filters for natural colors and high rendering on nebulae. The gap between green and red blocks the main sodium light-pollution line at 589nm, improving color separation.\u003c\/p\u003e\n\u003cp\u003eCompatible with large-format \u003cstrong\u003eKAF\/KAI\u003c\/strong\u003e, \u003cstrong\u003eSony IMX\u003c\/strong\u003e and \u003cstrong\u003eG-Sense\u003c\/strong\u003e sensors, with transmission above \u003cstrong\u003e95%\u003c\/strong\u003e and focal ratios down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e. The increased 3mm thickness ensures flatness over larger surfaces, ideal for large-format filter wheels.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTransmission \u003cstrong\u003e\u0026gt;95%\u003c\/strong\u003e guaranteed on all four channels\u003c\/li\u003e\n\u003cli\u003eRGB balance \u003cstrong\u003e1:1:1\u003c\/strong\u003e (difference \u0026lt;10%) for equivalent exposures\u003c\/li\u003e\n\u003cli\u003eSodium blocking at 589nm between G and R channels for optimal color separation\u003c\/li\u003e\n\u003cli\u003eMonolithic, non-glued substrate, increased 3mm thickness\u003c\/li\u003e\n\u003cli\u003eHand-blackened edges – stray light and halos minimized\u003c\/li\u003e\n\u003cli\u003eCompatible with fast telescopes down to \u003cstrong\u003ef\/2.0\u003c\/strong\u003e\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\u003eContents\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e4 filters: L + R + G + B\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\u003ePassband transmission\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e\u0026gt;95%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOut-of-band blocking\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eOD3 @ 300–1050nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMonolithic optical glass, 3mm ±0.05mm\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\u003eFlatness\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1\/4λ\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e30\"\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCoating\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMulti-layer nano-coating, double-sided\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRGB balance\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1:1:1 (±10%)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDown to f\/2.0\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended use\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMono CCD\/CMOS, nebulae, galaxies, large-format deep sky\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":58535499202891,"sku":"ANA-LRGB-50","price":749.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/antlia-filtri-lrgb-36mm-kit-contrasto-elevato-riprese-deep-sky-camere-monocromatiche_32b9a6fe-e218-4ae9-b343-b189bb8c436f.jpg?v=1789892362"},{"product_id":"antlia-filtro-cak-3nm-125","title":"Antlia CaK 3nm 393.3nm Filter 1.25\"","description":"\u003ch2\u003eAntlia CaK 3nm 393.3nm Filter 1.25\" – Ultra-Narrow Band for Solar Imaging\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia CaK 3nm filter\u003c\/strong\u003e is an ultra-narrow bandpass filter centered on the ionized Calcium II (CaK) line at \u003cstrong\u003e393.3nm\u003c\/strong\u003e, built on a heat-resistant, double-polished substrate with the most advanced multi-coatings. It is designed to maximize contrast for high-resolution imaging of sunspots, solar surface granulation and other features prominent in CaK light.\u003c\/p\u003e\n\u003cp\u003eThe high blocking specification – OD5 (0.001%) between 200 and 1200nm and OD3 (0.1%) between 1200 and 1500nm – delivers exceptional resolution for imaging. The CaK band (393nm) makes solar features almost invisible to the human eye due to low sensitivity and poor resolving ability at this frequency: the filter is therefore \u003cstrong\u003enot recommended for visual observation\u003c\/strong\u003e, but designed for imaging with cameras whose spectral response goes well beyond human vision.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e the CaK 3nm 393.3nm filter must be used \u003cstrong\u003eexclusively in combination with a Herschel wedge\u003c\/strong\u003e. 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The Herschel wedge design is well known for producing sharper, higher-contrast images than other solar light-reduction systems.\u003c\/p\u003e\n\u003cp\u003eThe wedge transmits a reduced, safe amount of light to the camera; image brightness can be conveniently adjusted via a control ring with aperture blades, similar to that used in camera lenses. Built with CNC machining and multi-coated anti-reflection optical components to minimize internal reflections and stray light, the system integrates an ultra-narrow band Antlia filter of \u003cstrong\u003e3nm\u003c\/strong\u003e, centered on the Calcium II K line at \u003cstrong\u003e393.3nm\u003c\/strong\u003e, mounted in a standard 1.25\" holder. Unlike other designs that may overheat, the Antlia wedge directs excess energy into an extra-thick polycrystalline ceramic diffuser at the rear, with cooling vents for effective heat dissipation.\u003c\/p\u003e\n\u003cp\u003eThe system includes a right-angle prism, CaK filter, solar finder for centering the sun, and heat dissipation system. \u003cstrong\u003eIntended for imaging only\u003c\/strong\u003e: not suitable for visual observation nor for solar prominence imaging. 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