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It performs exceptionally well with \u003cstrong\u003ecolor CMOS cameras\u003c\/strong\u003e, \u003cstrong\u003eDSLRs\u003c\/strong\u003e, and \u003cstrong\u003eCCD cameras (mono or color)\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhy choose the Optolong L-eXtreme\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEffectively reduces light pollution\u003c\/li\u003e\n  \u003cli\u003eIdeal for emission nebulae (HII regions)\u003c\/li\u003e\n  \u003cli\u003eHigh transmission up to \u003cstrong\u003e90%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e7nm narrow bandpass for superior contrast\u003c\/li\u003e\n  \u003cli\u003eExcellent color balance with one-shot color cameras\u003c\/li\u003e\n  \u003cli\u003eSuitable for Bortle 7–8 skies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRecommended uses\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLight pollution reduction\u003c\/li\u003e\n  \u003cli\u003eEnhancing contrast on emission nebulae\u003c\/li\u003e\n  \u003cli\u003eDeep-sky imaging with color CMOS and DSLR cameras\u003c\/li\u003e\n  \u003cli\u003eCompatible with CCD cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\u003ctd\u003eDiameter\u003c\/td\u003e\u003ctd\u003e2\" (50.8mm)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eThread\u003c\/td\u003e\u003ctd\u003eM48x0.75\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eFilter type\u003c\/td\u003e\u003ctd\u003eDual Band \/ Narrowband\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eBandpass\u003c\/td\u003e\u003ctd\u003e7nm\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eEmission lines\u003c\/td\u003e\u003ctd\u003eH-Alpha, OIII, H-Beta\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eTransmission\u003c\/td\u003e\u003ctd\u003eUp to 90%\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eCompatibility\u003c\/td\u003e\u003ctd\u003eColor CMOS, DSLR, mono\/color CCD\u003c\/td\u003e\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe Optolong L-eXtreme filter is a must-have for serious astrophotographers who want to capture detailed and high-contrast nebula images, even from heavily light-polluted locations.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51261302800715,"sku":"OPL-eXtreme-2","price":289.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/optolong-filtro-l-extreme-50.8mm-astrofotografia-doppia-banda.jpg?v=1744221765"},{"product_id":"optolong-filtro-l-enhance-canon-eos-clip","title":"Optolong L-eNhance EOS Clip – Canon APS-C Filter","description":"\u003ch2\u003eOptolong L-eNhance EOS Clip Canon APS-C – Dual Band Clip-in for Canon DSLR\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eOptolong L-eNhance EOS Clip\u003c\/strong\u003e for Canon APS-C is the \u003cstrong\u003eclip-in version\u003c\/strong\u003e of the L-eNhance, installed directly inside the camera body. 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It's designed specifically for very fast optics (f\/2-f\/4), where traditional nebula filters lose effectiveness due to the spectral shift linked to the angle of light incidence.\u003c\/p\u003e\u003ch3\u003eWhy spectral shift matters\u003c\/h3\u003e\u003cp\u003eWith very fast focal ratios — fast Ritchey-Chrétien astrographs, bright photographic lenses or ultra-fast refractors — the transmission band of an interference filter tends to shift toward shorter wavelengths when light arrives at wide angles. IDAS designed the Nebula Booster series specifically to compensate for this effect, maintaining a sharp (\"flat-top\") cutoff even under extreme imaging conditions.\u003c\/p\u003e\u003ch3\u003eIGAD coating technology\u003c\/h3\u003e\u003cp\u003eThe Nebula Booster NB1 uses IGAD (Ion-Gun Assist Deposition) coating technology, originally developed for fiber-optic telecommunications, where long-term stability of optical coatings (over 25 years) is a critical requirement. Applied to astronomical filters, this technique ensures coatings that remain resistant even under strong temperature and humidity swings, keeping the spectral curve constant over time.\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\u003e98%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter diameter\u003c\/td\u003e\u003ctd\u003e52 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount\u003c\/td\u003e\u003ctd\u003eThreaded ring\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGlass thickness\u003c\/td\u003e\u003ctd\u003e2.5 mm (parfocal with other IDAS filters)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eInfrared blocking\u003c\/td\u003e\u003ctd\u003eYes, up to 1100 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter type\u003c\/td\u003e\u003ctd\u003eUHC multi-band filter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eNebula Booster\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\u003eH-alpha band\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\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eThe Nebula Booster NB1 is suitable for wide-field astrophotography of emission nebulae, with both unmodified DSLR\/mirrorless cameras and one-shot-color astronomy cameras. It's a particularly effective choice paired with fast astrographs and lenses, where it maximizes nebula contrast without compromising the overall color rendition of the sky.\u003c\/p\u003e\u003cp\u003eManufactured by Hutech Corporation (Japan) under the IDAS brand, one of the reference names in high-performance astronomical filter production.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887776932171,"sku":"ID61149","price":299.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-multi-banda-idas-nebula-booster-nb1-52mm.jpg?v=1785509776"},{"product_id":"filtro-idas-ngs1-clip-canon-eos-aps-c","title":"IDAS NGS1 Clip Filter Canon EOS APS-C","description":"\u003ch2\u003eClip filter for Canon EOS APS-C cameras against light pollution\u003c\/h2\u003e\u003cp\u003eThe NGS1 filter, in clip version fitted directly into the Canon EOS APS-C camera body, belongs to IDAS's LPS-D3 series. Unlike narrowband filters, it doesn't isolate a single spectral line but selectively cuts stray light sources, leaving the color balance of broadband subjects like galaxies and star clusters largely unchanged.\u003c\/p\u003e\u003ch3\u003eAlso effective against natural airglow\u003c\/h3\u003e\u003cp\u003eIn addition to artificial light pollution, the NGS1 filter also reduces airglow, the natural glow of the upper atmosphere generated by the recombination of oxygen and nitrogen after exposure to solar UV rays. This phenomenon becomes especially visible in shots taken from high-altitude observing sites under very dark skies, where the NGS1 filter offers a concrete advantage over an unfiltered sensor.\u003c\/p\u003e\u003ch3\u003eDesigned for fast optics\u003c\/h3\u003e\u003cp\u003eLike all IDAS interference filters, the spectral cutoff was designed to remain stable even at the wide angles of incidence typical of very fast photographic optics, thanks to IGAD coating technology.\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\u003eClip filter\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\u003eCompatibility\u003c\/td\u003e\u003ctd\u003eCanon EOS APS-C\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 those shooting with an unmodified Canon EOS APS-C camera body who want to reduce the impact of urban light pollution without altering the sky's natural colors. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887850725707,"sku":"ID64639","price":329.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-idas-ngs1-clip-canon-eos-aps-c-inquinamento-luminoso.jpg?v=1785509766"},{"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-ngs1-48mm-luminosita-inquinamento.jpg?v=1785509755"},{"product_id":"filtro-idas-type-4-bgr-l-125-pollici","title":"IDAS Type 4 BGR+L Filter 1.25\"","description":"\u003ch2\u003eTrichromy filter set for color rendition closer to the human eye\u003c\/h2\u003e\u003cp\u003eIDAS's Type 4 series is designed for color imaging through filter combination (BGR or BGR+L), with special attention to color fidelity as perceived by the human eye, an aspect often overlooked in traditional RGB sets for astrophotography.\u003c\/p\u003e\u003ch3\u003eWhy the red filter includes a blue component\u003c\/h3\u003e\u003cp\u003eA small response in the blue (B) band was deliberately built into the red filter (R), to correctly reproduce violet frequencies as violet rather than pure blue, a typical error in conventional RGB filters that don't account for this overlap.\u003c\/p\u003e\u003ch3\u003eB\/G crossover point calibrated on the OIII lines\u003c\/h3\u003e\u003cp\u003eThe crossover point between the blue (B) and green (G) filters sits just below 500nm, to correctly balance the color of the two OIII emission lines (500.7nm and 495.8nm), typical of many planetary and emission nebulae.\u003c\/p\u003e\u003ch3\u003eTwo imaging modes\u003c\/h3\u003e\u003cp\u003eThe set allows both conventional BGR+L imaging, pairing the clear filter (L) as a luminance component to block infrared, and full-band false-color imaging, exploiting the sensor's full spectral sensitivity with infrared-capable optics.\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\u003eFilter size\u003c\/td\u003e\u003ctd\u003e1.25\"\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eIGAD multi-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eRGB Type 4\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eType\u003c\/td\u003e\u003ctd\u003eFilter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eConstruction type\u003c\/td\u003e\u003ctd\u003eL-RGB filters\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\u003eSpectral stability (IGAD coating)\u003c\/td\u003e\u003ctd\u003eDrift reduced to ±1nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSet suitable for those doing color imaging with monochrome CCD\/CMOS cameras in LRGB configuration, aiming for more faithful color rendition than generic RGB filters. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887856329035,"sku":"ID63995","price":559.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/idas-filtro-type4-bgrl-set-filtri-astrophotografia.jpg?v=1785509744"},{"product_id":"filtro-idas-type-4-bgr-l-31mm","title":"IDAS Type 4 BGR+L Filter 31mm","description":"\u003ch2\u003eTrichromy filter set for color rendition closer to the human eye\u003c\/h2\u003e\u003cp\u003eIDAS's Type 4 series is designed for color imaging through filter combination (BGR or BGR+L), with special attention to color fidelity as perceived by the human eye, an aspect often overlooked in traditional RGB sets for astrophotography. This 31mm version is suitable for cameras with small to medium-format sensors.\u003c\/p\u003e\u003ch3\u003eWhy the red filter includes a blue component\u003c\/h3\u003e\u003cp\u003eA small response in the blue (B) band was deliberately built into the red filter (R), to correctly reproduce violet frequencies as violet rather than pure blue, a typical error in conventional RGB filters that don't account for this overlap.\u003c\/p\u003e\u003ch3\u003eB\/G crossover point calibrated on the OIII lines\u003c\/h3\u003e\u003cp\u003eThe crossover point between the blue (B) and green (G) filters sits just below 500nm, to correctly balance the color of the two OIII emission lines (500.7nm and 495.8nm), typical of many planetary and emission nebulae.\u003c\/p\u003e\u003ch3\u003eTwo imaging modes\u003c\/h3\u003e\u003cp\u003eThe set allows both conventional BGR+L imaging, pairing the clear filter (L) as a luminance component to block infrared, and full-band false-color imaging, exploiting the sensor's full spectral sensitivity with infrared-capable optics.\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\u003eFilter size\u003c\/td\u003e\u003ctd\u003e31 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eIGAD multi-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eRGB Type 4\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eType\u003c\/td\u003e\u003ctd\u003eFilter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eConstruction type\u003c\/td\u003e\u003ctd\u003eL-RGB filters\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\u003eSpectral stability (IGAD coating)\u003c\/td\u003e\u003ctd\u003eDrift reduced to ±1nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSet suitable for those doing color imaging with compact monochrome CCD\/CMOS cameras in LRGB configuration, aiming for more faithful color rendition than generic RGB filters. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887858786635,"sku":"ID63994","price":999.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/idas-filtro-type4-bgr-l-31mm-set-filtri-ottica.jpg?v=1785509734"},{"product_id":"filtro-idas-type-4-bgr-l-52mm","title":"IDAS Type 4 BGR+L Filter 52mm","description":"\u003ch2\u003eTrichromy filter set for color rendition closer to the human eye\u003c\/h2\u003e\u003cp\u003eIDAS's Type 4 series is designed for color imaging through filter combination (BGR or BGR+L), with special attention to color fidelity as perceived by the human eye, an aspect often overlooked in traditional RGB sets for astrophotography. This M52-mounted version is suitable for cameras with larger sensors.\u003c\/p\u003e\u003ch3\u003eWhy the red filter includes a blue component\u003c\/h3\u003e\u003cp\u003eA small response in the blue (B) band was deliberately built into the red filter (R), to correctly reproduce violet frequencies as violet rather than pure blue, a typical error in conventional RGB filters that don't account for this overlap.\u003c\/p\u003e\u003ch3\u003eB\/G crossover point calibrated on the OIII lines\u003c\/h3\u003e\u003cp\u003eThe crossover point between the blue (B) and green (G) filters sits just below 500nm, to correctly balance the color of the two OIII emission lines (500.7nm and 495.8nm), typical of many planetary and emission nebulae.\u003c\/p\u003e\u003ch3\u003eTwo imaging modes\u003c\/h3\u003e\u003cp\u003eThe set allows both conventional BGR+L imaging, pairing the clear filter (L) as a luminance component to block infrared, and full-band false-color imaging, exploiting the sensor's full spectral sensitivity with infrared-capable optics.\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\u003eFilter size\u003c\/td\u003e\u003ctd\u003e52 mm (M52)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eIGAD multi-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eRGB Type 4\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eType\u003c\/td\u003e\u003ctd\u003eFilter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eConstruction type\u003c\/td\u003e\u003ctd\u003eL-RGB filters\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\u003eSpectral stability (IGAD coating)\u003c\/td\u003e\u003ctd\u003eDrift reduced to ±1nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSet suitable for those doing color imaging with monochrome CCD\/CMOS cameras in full-frame or larger format in LRGB configuration, aiming for more faithful color rendition than generic RGB filters. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887863832907,"sku":"ID63992","price":899.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/idas-filtro-type4-bgr-l-52mm-set-filtri-tricromia.jpg?v=1785509672"},{"product_id":"set-filtri-idas-sho-508mm","title":"IDAS SHO Filter Set 50.8mm","description":"\u003ch2\u003eComplete set of three narrowband filters for SHO imaging\u003c\/h2\u003e\u003cp\u003eIDAS's SHO set brings together three interference filters dedicated to the narrowband imaging technique known as the Hubble palette: ionized hydrogen (H-alpha), doubly ionized oxygen (OIII), and ionized sulfur (SII). Combining the three monochrome exposures in false color produces very high-contrast images of emission nebulae, with a distinctive color rendition highly valued in deep-sky astrophotography.\u003c\/p\u003e\u003ch3\u003eNarrow, targeted transmission bands\u003c\/h3\u003e\u003cp\u003eEach filter isolates a very small portion of the spectrum around its own emission line, blocking nearly all stray light from light pollution and airglow. This makes the set particularly effective even from urban or suburban skies, where traditional broadband filters perform less well.\u003c\/p\u003e\u003ch3\u003eIGAD coating for long-term stability\u003c\/h3\u003e\u003cp\u003eLike the other filters in the IDAS range, the SHO set uses IGAD coating technology, which ensures a transmission curve that stays stable over time even under strong temperature and humidity swings.\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\u003e6.8 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOIII bandwidth\u003c\/td\u003e\u003ctd\u003e6.0 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSII bandwidth\u003c\/td\u003e\u003ctd\u003e6.3 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter size\u003c\/td\u003e\u003ctd\u003e50.8 mm (2\")\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGlass thickness\u003c\/td\u003e\u003ctd\u003e3 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eIGAD multi-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eSHO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eConstruction type\u003c\/td\u003e\u003ctd\u003eNarrowband (line) filter\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\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSet suitable for narrowband astrophotography of emission nebulae and supernova remnants with telescopes fitted with a 2\" focuser, both under dark skies and in light-polluted conditions. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887865438539,"sku":"ID76810","price":1490.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/idas-set-filtri-50-8mm-imaging-narrowband-hubble.jpg?v=1785509660"},{"product_id":"set-filtri-idas-sho-52mm","title":"IDAS SHO Filter Set 52mm","description":"\u003ch2\u003eComplete set of three narrowband filters for SHO imaging\u003c\/h2\u003e\u003cp\u003eIDAS's SHO set brings together three interference filters dedicated to the narrowband imaging technique known as the Hubble palette: ionized hydrogen (H-alpha), doubly ionized oxygen (OIII), and ionized sulfur (SII). Combining the three monochrome exposures in false color produces very high-contrast images of emission nebulae, with a distinctive color rendition highly valued in deep-sky astrophotography. This M52 threaded-mount version is suitable for cameras and filter wheels with a threaded connection.\u003c\/p\u003e\u003ch3\u003eNarrow, targeted transmission bands\u003c\/h3\u003e\u003cp\u003eEach filter isolates a very small portion of the spectrum around its own emission line, blocking nearly all stray light from light pollution and airglow. This makes the set particularly effective even from urban or suburban skies, where traditional broadband filters perform less well.\u003c\/p\u003e\u003ch3\u003eIGAD coating for long-term stability\u003c\/h3\u003e\u003cp\u003eLike the other filters in the IDAS range, the SHO set uses IGAD coating technology, which ensures a transmission curve that stays stable over time even under strong temperature and humidity swings.\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\u003e6.8 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOIII bandwidth\u003c\/td\u003e\u003ctd\u003e6.0 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSII bandwidth\u003c\/td\u003e\u003ctd\u003e6.3 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter size\u003c\/td\u003e\u003ctd\u003e52 mm (M52)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGlass thickness\u003c\/td\u003e\u003ctd\u003e3 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOptical coating\u003c\/td\u003e\u003ctd\u003eIGAD multi-coating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eSHO\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eConstruction type\u003c\/td\u003e\u003ctd\u003eNarrowband (line) filter\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\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSet suitable for narrowband astrophotography of emission nebulae and supernova remnants with cameras or filter wheels with an M52 connection, both under dark skies and in light-polluted conditions. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887866650955,"sku":"ID76811","price":1490.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/idas-set-filtri-sho-52mm-fotografia-astronomica-bandastretta.jpg?v=1785509652"},{"product_id":"filtro-idas-clear-odw-2-pollici","title":"IDAS Clear ODW Filter 2\"","description":"\u003ch2\u003eA neutral piece of glass to keep focus between filters\u003c\/h2\u003e\u003cp\u003eThe IDAS Clear ODW is a transparent, multi-coated full-spectrum filter, designed not to alter incoming light but to occupy the same optical space as other IDAS filters of the same thickness (2.5mm). This lets anyone using a filter wheel or multi-slot drawer switch from a colored or narrowband filter to the Clear ODW without needing to refocus.\u003c\/p\u003e\u003ch3\u003eWhen a filter that does nothing is actually useful\u003c\/h3\u003e\u003cp\u003eThe Clear ODW is useful in several practical situations: as a reference position in a multi-slot filter wheel for full-spectrum (luminance) shots, for optical calibration tests, or simply to keep the optical path constant when alternating between sessions with and without a filter. Being fully transparent across the visible spectrum, it introduces no color alteration whatsoever.\u003c\/p\u003e\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\u003cp\u003eAluminum 2\" ring mount, with a 48mm threaded connection. Transparent glass with a thickness of 2.5mm, parfocal with most other IDAS filters in the same category.\u003c\/p\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSuitable for anyone who already owns other 2.5mm-thick IDAS filters and wants a neutral position in their filter wheel, without having to refocus every time they switch filters. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887870157131,"sku":"ID75295","price":159.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-clear-odas-48mm-multi-rivestito-ottica-trasparente.jpg?v=1785509642"},{"product_id":"filtro-idas-lps-d3-drop-in-canon-ef","title":"IDAS LPS-D3 Drop-In Filter Canon EF","description":"\u003ch2\u003eDrop-in filter for Canon EF full-frame lenses\u003c\/h2\u003e\u003cp\u003eThe IDAS LPS-D3 filter (formerly known as the NGS1 series), in drop-in version, fits into the rear mount of Canon EF lenses designed for full-frame camera bodies. Unlike narrowband filters, it acts selectively on artificial light sources without significantly altering the color balance of broadband subjects like galaxies and star clusters.\u003c\/p\u003e\u003ch3\u003eAlso effective against natural airglow\u003c\/h3\u003e\u003cp\u003eIn addition to artificial light, the LPS-D3 filter also reduces airglow, the faint glow of the upper atmosphere generated by the recombination of oxygen and nitrogen after exposure to solar UV rays, a phenomenon that becomes especially visible in shots taken from high-altitude sites under very dark skies.\u003c\/p\u003e\u003ch3\u003eDesigned for fast photographic optics\u003c\/h3\u003e\u003cp\u003eThanks to IGAD coating technology, the filter's transmission curve remains stable even at the wide angles of incidence typical of very fast photographic lenses, a critical aspect for anyone photographing the sky with photo telephoto lenses rather than dedicated telescopes.\u003c\/p\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eSuitable for anyone photographing the night sky with Canon EF lenses on a full-frame camera body, in contexts with urban or suburban light pollution, without needing to modify the camera. Made in Japan by Hutech Corporation under the IDAS brand.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887875924299,"sku":"ID75297","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/filtro-lps-d3-drop-in-canon-ef-idas.jpg?v=1785509637"},{"product_id":"filtro-idas-nbz-ii-10nm-2-pollici","title":"IDAS NBZ-II Filter 10nm 2\"","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.\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\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\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 telescopes fitted with a 2\" focuser, 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":57887881331019,"sku":"ID87198","price":362.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/idas-filtro-nbz-II-10nm-48mm-doppio-banda-narrowband.jpg?v=1785509630"},{"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-narrowband-m52.jpg?v=1785509621"},{"product_id":"baader-set-filtri-narrowband-6-5nm-sho","title":"Baader Narrowband Filter Set 6.5nm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader Narrowband Filter Set 6.5nm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the professional combination of three precision narrowband filters, CMOS-optimized, designed for tri-colour imaging of emission nebulae according to the famous \"Hubble\" palette (SHO).\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, one palette\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656.3nm), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500.7nm) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (671.7nm), all with a 6.5nm FWHM passband — the optimal bandwidth for optical systems from f\/10 to f\/3.5, the vast majority of amateur telescopes in use. The three bands are calibrated to allow 1:1:1 exposure ratios, matched to the typical quantum efficiency and signal-to-noise ratio of modern CMOS sensors.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eEach filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. Each filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelengths\u003c\/td\u003e\n\u003ctd\u003e656.3 \/ 500.7 \/ 671.7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e6.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers who want to create false-colour \"Hubble Palette\" style images of emission nebulae, planetary nebulae and supernova remnants, even under heavy light pollution and with the moon high in the sky. Compatible with filter wheels and most mono CMOS cameras for astrophotography.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":57946506625355,"sku":"BRBP2961650","price":418.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58166939353419,"sku":"BRBP2961653","price":708.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58166939386187,"sku":"BRBP2961651","price":441.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58166939418955,"sku":"BRBP2961652","price":500.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58166939451723,"sku":"BRBP2961654","price":806.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58166939484491,"sku":"BRBP2961655","price":859.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58166939517259,"sku":"BRBP2961656","price":1091.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-set-filtri-narrowband-65nm-114pollice.jpg?v=1787056928"},{"product_id":"baader-set-filtri-ultra-narrowband-3-5-4nm-sho","title":"Baader Ultra-Narrowband Filter Set 3.5\/4nm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader Ultra-Narrowband Filter Set 3.5\/4nm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the even narrower-band version of the Baader CMOS-Optimized range, designed for maximum possible contrast even under heavily light-polluted skies (Bortle 9\/8\/7\/6), for tri-colour imaging of emission nebulae according to the \"Hubble\" palette (SHO).\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, ultra-narrow band\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656.3nm, 3.5nm FWHM), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500.7nm, 4nm FWHM) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (671.7nm, 4nm FWHM), optimized for optical systems from f\/10 to f\/3.5. Compared to the standard Narrowband version (6.5nm), the narrower passband allows for even greater contrast, further reduces the apparent size of stars and reveals the finest nebula details — essential under heavy urban light pollution.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eEach filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. Each filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelengths\u003c\/td\u003e\n\u003ctd\u003e656.3 \/ 500.7 \/ 671.7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e3.5 \/ 4 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers working under heavily light-polluted skies who want the maximum possible contrast for false-colour \"Hubble Palette\" style images of emission nebulae, planetary nebulae and supernova remnants. 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Each filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e6.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/3.4 to f\/1.8 (ultra-fast astrographs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eEssential for astrophotographers using ultra-fast astrographs such as Celestron RASA, Hyperstar systems or other optical trains between f\/1.8 and f\/3.5, where normal narrowband filters would not guarantee full transmission. Enables, for the first time, truly exploiting fast optics for high-contrast imaging of emission nebulae in \"Hubble Palette\" style (SHO).\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":57946623705419,"sku":"BRBP2961660","price":450.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58171401371979,"sku":"BRBP2961663","price":741.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58171401404747,"sku":"BRBP2961661","price":478.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58171401437515,"sku":"BRBP2961662","price":532.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58171401470283,"sku":"BRBP2961664","price":774.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58171401503051,"sku":"BRBP2961665","price":891.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58171401535819,"sku":"BRBP2961666","price":1106.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-set-filtri-highspeed-f2-65nm-114pollice.jpg?v=1787057944"},{"product_id":"baader-set-filtri-ultra-highspeed-f2-3-5-4nm-sho","title":"Baader f\/2 Ultra-Highspeed Filter Set 3.5\/4nm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader f\/2 Ultra-Highspeed Filter Set 3.5\/4nm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e combines the central wavelength pre-shift of the Highspeed range with the ultra-narrow passband of the Ultra-Narrowband range, for the absolute maximum contrast on ultra-fast astrographs such as Celestron RASA and Hyperstar.\u003c\/p\u003e\n\n\u003ch2\u003eThe best of both technologies\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter, an \u003cstrong\u003eO-III\u003c\/strong\u003e filter and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter, with an ultra-narrow 3.5\/4nm FWHM passband and a \u003cstrong\u003eCWL pre-shift\u003c\/strong\u003e specifically calibrated for optical systems from f\/3.4 to f\/1.8. 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The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e3.5 \/ 4 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/3.4 to f\/1.8 (ultra-fast astrographs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eThe ultimate set for astrophotographers using ultra-fast astrographs such as Celestron RASA or Hyperstar systems who want the absolute maximum contrast available, even under heavily light-polluted skies, for high-contrast imaging of emission nebulae in \"Hubble Palette\" style (SHO).\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":57946653425995,"sku":"BRBP2961680","price":790.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58171620917579,"sku":"BRBP2961683","price":1183.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58171620950347,"sku":"BRBP2961681","price":839.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58171620983115,"sku":"BRBP2961682","price":1005.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58171621015883,"sku":"BRBP2961684","price":1279.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58171621048651,"sku":"BRBP2961685","price":1364.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58171621081419,"sku":"BRBP2961686","price":1790.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-set-filtri-ultra-highspeed-f2-35-4nm-114pollice.jpg?v=1787058402"},{"product_id":"baader-set-filtri-ultra-highspeed-f3-3-5-4nm-sho","title":"Baader f\/3 Ultra-Highspeed Filter Set 3.5\/4nm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Baader f\/3 Ultra-Highspeed Filter Set 3.5\/4nm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the version of the CMOS-Optimized range designed for fast astrographs (though not as extreme as f\/2 systems) from f\/3.4 to f\/2.3, with an ultra-narrow passband for maximum available contrast.\u003c\/p\u003e\n\n\u003ch2\u003eUltra-narrow passband for fast optics\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter, an \u003cstrong\u003eO-III\u003c\/strong\u003e filter and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter, with a 3.5\/4nm FWHM passband, optimised for optical systems from f\/3.4 to f\/2.3. This configuration offers the maximum possible contrast for high-contrast imaging of emission nebulae, revealing the finest details even under heavy light pollution.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eEach filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilters included\u003c\/td\u003e\n\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e3.5 \/ 4 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/3.4 to f\/2.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers using fast astrographs with a focal ratio between f\/2.3 and f\/3.4 who want the maximum available contrast for imaging emission nebulae, planetary nebulae and supernova remnants in \"Hubble Palette\" style (SHO), even under light-polluted skies.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":57946657816907,"sku":"BRBP2961640","price":776.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58173992501579,"sku":"BRBP2961643","price":1127.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58173992534347,"sku":"BRBP2961641","price":826.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58173992567115,"sku":"BRBP2961642","price":992.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58173992599883,"sku":"BRBP2961644","price":1218.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58173992632651,"sku":"BRBP2961645","price":1299.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58173992665419,"sku":"BRBP2961646","price":1687.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-set-filtri-ultra-highspeed-f3-35-4nm-114pollice.jpg?v=1787075157"},{"product_id":"optolong-set-filtri-sho-1-25-h-alpha-oiii-sii","title":"Optolong SHO Filter Set 1.25\" (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Optolong SHO Filter Set 1.25\" (H-alpha 7nm \/ O-III 6.5nm \/ S-II 6.5nm)\u003c\/strong\u003e is the combination of three narrowband filters designed for tri-color imaging of emission nebulae in the famous \"Hubble\" palette (SHO), at an affordable price.\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, one palette\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656nm, 7nm bandwidth), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500nm, 6.5nm bandwidth) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (672nm, 6.5nm bandwidth). They are suitable for most emission nebulae, planetary nebulae and supernova remnants, and can be used even with the moon high in the sky or under strong urban light pollution, without exposure time being an issue.\u003c\/p\u003e\n\n\u003ch2\u003eConstruction and coatings\u003c\/h2\u003e\n\u003cp\u003eThe filters are made with high-quality optical substrate and multi-layer coating using ion-assisted deposition (IAD) technology, which ensures scratch resistance and central wavelength stability even with temperature changes. The frame is aluminum.\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\u003eFilters included\u003c\/td\u003e\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBandwidth\u003c\/td\u003e\u003ctd\u003eH-alpha 7nm \/ O-III 6.5nm \/ S-II 6.5nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFormat\u003c\/td\u003e\u003ctd\u003e1.25\" (31.8mm)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFrame\u003c\/td\u003e\u003ctd\u003eAluminum\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eOptolong\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 those getting started with narrowband imaging who want to create false-color images in the \"Hubble Palette\" style of emission nebulae, without having to buy the three filters separately. Compatible with 1.25\" filter wheels and most monochrome CMOS cameras for astrophotography.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":57948223471947,"sku":"OPSHO-125","price":419.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/Optolong-Filters-SHO-Filter-Kit-1-25_4ce6161a-3da7-4aca-b4f2-d8bea5455ab9.jpg?v=1785510051"},{"product_id":"optolong-set-filtri-sho-2-h-alpha-oiii-sii","title":"Optolong SHO Filter Set 2\" (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Optolong SHO Filter Set 2\" (H-alpha 7nm \/ O-III 6.5nm \/ S-II 6.5nm)\u003c\/strong\u003e is the combination of three narrowband filters designed for tri-color imaging of emission nebulae in the famous \"Hubble\" palette (SHO), at an affordable price.\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, one palette\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656nm, 7nm bandwidth), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500nm, 6.5nm bandwidth) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (672nm, 6.5nm bandwidth). They are suitable for most emission nebulae, planetary nebulae and supernova remnants, and can be used even with the moon high in the sky or under strong urban light pollution, without exposure time being an issue.\u003c\/p\u003e\n\n\u003ch2\u003eConstruction and coatings\u003c\/h2\u003e\n\u003cp\u003eThe filters are made with high-quality optical substrate and multi-layer coating using ion-assisted deposition (IAD) technology, which ensures scratch resistance and central wavelength stability even with temperature changes. The frame is aluminum.\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\u003eFilters included\u003c\/td\u003e\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBandwidth\u003c\/td\u003e\u003ctd\u003eH-alpha 7nm \/ O-III 6.5nm \/ S-II 6.5nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFormat\u003c\/td\u003e\u003ctd\u003e2\" (50.8mm)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFrame\u003c\/td\u003e\u003ctd\u003eAluminum\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eOptolong\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 those getting started with narrowband imaging who want to create false-color images in the \"Hubble Palette\" style of emission nebulae, without having to buy the three filters separately. Compatible with 2\" filter wheels and most monochrome CMOS cameras for astrophotography.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":57948223603019,"sku":"OPSHO-2","price":599.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/Optolong-Filters-SHO-Filter-Kit-7nm-2_0d9bb82a-b709-49b6-9d89-6b1d1809044f.jpg?v=1785510045"},{"product_id":"optolong-set-filtri-sho-3nm-2-h-alpha-oiii-sii","title":"Optolong SHO Filter Set 3nm 2\" (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Optolong SHO Filter Set 3nm 2\" (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the even narrower-band version of the Optolong SHO range, designed for the maximum possible contrast with cooled monochrome CCD cameras and modified DSLRs.\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, extra-narrow bandwidth\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656nm, 3nm bandwidth), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500nm, 3nm bandwidth) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (672nm, 3nm bandwidth). Corresponding to the R-G-B channels (H-alpha, O-III, S-II), they allow processing of images in \"Hubble\" style with astronomical post-processing software. Compared to the 6.5\/7nm version, the narrower bandwidth provides greater contrast, reduces background noise, and increases the visibility of faint nebula signals.\u003c\/p\u003e\n\n\u003ch2\u003eConstruction and coatings\u003c\/h2\u003e\n\u003cp\u003eThe filters are made with high-quality optical substrate and multi-layer coating using ion-assisted deposition (IAD) technology, which ensures scratch resistance and central wavelength stability even with temperature changes. The frame is aluminum.\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\u003eFilters included\u003c\/td\u003e\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBandwidth\u003c\/td\u003e\u003ctd\u003e3 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFormat\u003c\/td\u003e\u003ctd\u003e2\" (50.8mm)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFrame\u003c\/td\u003e\u003ctd\u003eAluminum\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eOptolong\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 astrophotographers using cooled monochrome CCD cameras or modified DSLRs who want the maximum contrast available for false-color images in the \"Hubble Palette\" style of emission nebulae, planetary nebulae, and supernova remnants, with reduced background noise and increased signal from faint nebulae.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":57948224880971,"sku":"OPSHO-3-2","price":1069.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/set-filtri-optolong-sho-3nm-2-inchi-h-alpha-o-iii-s-ii.jpg?v=1785510036"},{"product_id":"optolong-set-filtri-sho-3nm-36mm-h-alpha-oiii-sii","title":"Optolong SHO Filter Set 3nm 36mm (H-alpha\/O-III\/S-II)","description":"\u003cp\u003e\u003cstrong\u003eThe Optolong SHO Filter Set 3nm 36mm (H-alpha \/ O-III \/ S-II)\u003c\/strong\u003e is the unmounted version of the extra-narrowband Optolong SHO range, designed for the maximum possible contrast with cooled monochrome CCD cameras and modified DSLRs, in a format compatible with the most common filter wheels.\u003c\/p\u003e\n\n\u003ch2\u003eThree filters, extra-narrow bandwidth\u003c\/h2\u003e\n\u003cp\u003eThe set includes an \u003cstrong\u003eH-alpha\u003c\/strong\u003e filter (656nm, 3nm bandwidth), an \u003cstrong\u003eO-III\u003c\/strong\u003e filter (500nm, 3nm bandwidth) and an \u003cstrong\u003eS-II\u003c\/strong\u003e filter (672nm, 3nm bandwidth), all in unmounted 36mm format. Corresponding to the R-G-B channels (H-alpha, O-III, S-II), they allow processing of images in \"Hubble\" style with astronomical post-processing software. Compared to the 6.5\/7nm version, the narrower bandwidth provides greater contrast, reduces background noise, and increases the visibility of faint nebula signals.\u003c\/p\u003e\n\n\u003ch2\u003eConstruction and coatings\u003c\/h2\u003e\n\u003cp\u003eThe filters are made with high-quality optical substrate and multi-layer coating using ion-assisted deposition (IAD) technology, which ensures scratch resistance and central wavelength stability even with temperature changes.\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\u003eFilters included\u003c\/td\u003e\u003ctd\u003eH-alpha, O-III, S-II\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBandwidth\u003c\/td\u003e\u003ctd\u003e3 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFormat\u003c\/td\u003e\u003ctd\u003e36mm unmounted\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eOptolong\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 astrophotographers with 36mm filter wheels (such as ZWO EFW) using cooled monochrome CCD cameras or modified DSLRs who want the maximum contrast available for false-color images in the \"Hubble Palette\" style of emission nebulae, planetary nebulae, and supernova remnants.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":57948225995083,"sku":"OPSHO-3-36","price":859.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/set-filtri-sho-optolong-3nm-36mm-h-alpha-o-iii-s-ii.jpg?v=1785510013"},{"product_id":"celestron-filtro-lpr-rasa-8","title":"Celestron LPR Filter for RASA 8\"","description":"\u003ch2\u003eLPR Filter for RASA 8\"\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eLPR (Light Pollution Reduction) filter for RASA 8\"\u003c\/strong\u003e is designed specifically for the Rowe-Ackermann Schmidt Astrograph RASA 8\", to cut through urban light pollution and improve contrast when imaging deep-sky objects.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth\u003eFeature\u003c\/th\u003e\u003cth\u003eDetail\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eDiameter\u003c\/td\u003e\u003ctd\u003e46 mm\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eThickness\u003c\/td\u003e\u003ctd\u003e1.9 mm\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eCompatibility\u003c\/td\u003e\u003ctd\u003eRASA 8\"\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default","offer_id":58015055020363,"sku":"CSCE93614","price":465.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/celestron-filtro-lpr-rasa-8-01.jpg?v=1785658509"},{"product_id":"baader-filtro-h-alpha-narrowband-6-5nm","title":"Baader H-alpha Narrowband Filter 6.5nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader H-alpha Narrowband Filter 6.5nm\u003c\/strong\u003e is the CMOS-optimized narrowband filter for high-contrast imaging of emission nebulae, isolating the H-alpha line at 656.3nm.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eThe H-alpha filter passes light at 656nm, the best choice for high-contrast narrowband astrophotography, capable of revealing the richest nebula details even in areas with strong light pollution. With a 6.5nm FWHM passband, it's optimized for optical systems from f\/10 to f\/3.5 — the vast majority of amateur telescopes in use.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eH-alpha Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e656.3 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e6.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers who want to purchase the individual filters of the SHO palette separately (for example to complete or replace an existing set), or for those who photograph exclusively H-alpha emission nebulae without needing O-III or S-II. Compatible with filter wheels and most mono CMOS cameras for astrophotography.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58478508245323,"sku":"BRBP2961100","price":149.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58478523941195,"sku":"BRBP2961103","price":253.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58478523973963,"sku":"BRBP2961101","price":156.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58478524006731,"sku":"BRBP2961102","price":177.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58478524039499,"sku":"BRBP2961104","price":263.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58478524072267,"sku":"BRBP2961105","price":301.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58478524105035,"sku":"BRBP2961106","price":387.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-h-alpha-narrowband-65nm-114pollice.jpg?v=1789640260"},{"product_id":"baader-filtro-o-iii-narrowband-6-5nm","title":"Baader O-III Narrowband Filter 6.5nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader O-III Narrowband Filter 6.5nm\u003c\/strong\u003e is a narrowband filter that passes blue-green light at 500.7nm, the wavelength at which planetary nebulae and supernova remnants rich in doubly ionized oxygen shine. Optimized for modern CMOS cameras.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eLinear filter with a 6.5nm FWHM passband, recommended for optical systems from f\/10 to f\/3.5 — the vast majority of amateur telescopes in use. It reveals the details of planetary nebulae and supernova remnants even under light-polluted skies, since the narrow passband effectively blocks skyglow and artificial lighting.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eO-III Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e500.7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e6.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers who want to purchase the individual filters of the SHO palette separately (for example to complete or replace an existing set), or for those who photograph exclusively planetary nebulae and supernova remnants in O-III without needing H-alpha or S-II. Compatible with filter wheels and most mono CMOS cameras.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58478665105739,"sku":"BRBP2961175","price":146.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58478666481995,"sku":"BRBP2961178","price":247.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58478666514763,"sku":"BRBP2961176","price":154.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58478666547531,"sku":"BRBP2961177","price":176.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58478666580299,"sku":"BRBP2961179","price":296.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58478666613067,"sku":"BRBP2961180","price":306.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58478666645835,"sku":"BRBP2961181","price":382.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-o-iii-narrowband-65nm-114pollice.jpg?v=1789640246"},{"product_id":"baader-filtro-s-ii-narrowband-6-5nm","title":"Baader S-II Narrowband Filter 6.5nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader S-II Narrowband Filter 6.5nm\u003c\/strong\u003e is a narrowband filter that passes light from ionized sulfur atoms at 671.7nm, the wavelength at which many planetary nebulae, emission nebulae and supernova remnants shine. Optimized for modern CMOS cameras.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eLinear filter with a 6.5nm FWHM passband, recommended for optical systems from f\/10 to f\/3.5 — the vast majority of amateur telescopes in use. Combined with H-alpha and O-III, it enables tri-colour imaging according to the famous \"Hubble\" palette, showing delicate nebula structures clearly and with high contrast.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eS-II Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e671.7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e6.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers who want to purchase the individual filters of the SHO palette separately (for example to complete or replace an existing set), or for those who photograph exclusively planetary nebulae and supernova remnants in S-II without needing H-alpha or O-III. Compatible with filter wheels and most mono CMOS cameras.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58478718255435,"sku":"BRBP2961250","price":144.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58478722875723,"sku":"BRBP2961253","price":245.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58478722908491,"sku":"BRBP2961251","price":153.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58478722941259,"sku":"BRBP2961252","price":175.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58478722974027,"sku":"BRBP2961254","price":293.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58478723006795,"sku":"BRBP2961255","price":305.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58478723039563,"sku":"BRBP2961256","price":379.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-s-ii-narrowband-65nm-114pollice.jpg?v=1789640233"},{"product_id":"baader-filtro-h-alpha-ultra-narrowband-3-5nm","title":"Baader H-alpha Ultra-Narrowband Filter 3.5nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader H-alpha Ultra-Narrowband Filter 3.5nm\u003c\/strong\u003e is the even narrower-band version compared to the standard Narrowband (6.5nm), designed for maximum possible contrast even under heavily light-polluted skies (Bortle 9\/8\/7\/6).\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eLinear filter with a 3.5nm FWHM passband, recommended for optical systems from f\/10 to f\/3.5. Compared to the standard Narrowband version, the narrower passband allows for even greater contrast, further reduces the apparent size of stars and reveals the finest details of emission nebulae — essential under heavy urban light pollution.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eH-alpha Ultra-Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e656.3 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e3.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers working under heavily light-polluted skies who want the maximum possible contrast for H-alpha imaging, or for those who want to purchase the individual filters of the SHO palette separately to complete or replace an existing set. Compatible with filter wheels and most mono CMOS cameras.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58482387321163,"sku":"BRBP2961325","price":285.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58482395382091,"sku":"BRBP2961328","price":409.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58482395414859,"sku":"BRBP2961326","price":300.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58482395447627,"sku":"BRBP2961327","price":360.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58482395480395,"sku":"BRBP2961329","price":446.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58482395513163,"sku":"BRBP2961330","price":511.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58482395545931,"sku":"BRBP2961331","price":640.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-h-alpha-ultra-narrowband-35nm-114pollice.jpg?v=1789640219"},{"product_id":"baader-filtro-o-iii-ultra-narrowband-4nm","title":"Baader O-III Ultra-Narrowband Filter 4nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader O-III Ultra-Narrowband Filter 4nm\u003c\/strong\u003e is the even narrower-band version compared to the standard Narrowband (6.5nm), designed for maximum possible contrast even under heavily light-polluted skies (Bortle 9\/8\/7\/6).\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eLinear filter with a 4nm FWHM passband, recommended for optical systems from f\/10 to f\/3.5. Compared to the standard Narrowband version, the narrower passband allows for even greater contrast, further reduces the apparent size of stars and reveals the finest details of planetary nebulae and supernova remnants — essential under heavy urban light pollution.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eO-III Ultra-Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e500.7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e4 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers working under heavily light-polluted skies who want the maximum possible contrast for O-III imaging, or for those who want to purchase the individual filters of the SHO palette separately to complete or replace an existing set. Compatible with filter wheels and most mono CMOS cameras.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58482428117323,"sku":"BRBP2961400","price":262.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58482429329739,"sku":"BRBP2961403","price":384.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58482429362507,"sku":"BRBP2961401","price":283.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58482429395275,"sku":"BRBP2961402","price":339.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58482429428043,"sku":"BRBP2961404","price":414.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58482429460811,"sku":"BRBP2961405","price":424.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58482429493579,"sku":"BRBP2961406","price":564.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-o-iii-ultra-narrowband-4nm-114pollice.jpg?v=1789640205"},{"product_id":"baader-filtro-s-ii-ultra-narrowband-4nm","title":"Baader S-II Ultra-Narrowband Filter 4nm","description":"\u003cp\u003e\u003cstrong\u003eThe Baader S-II Ultra-Narrowband Filter 4nm\u003c\/strong\u003e is the even narrower-band version compared to the standard Narrowband (6.5nm), designed for maximum possible contrast even under heavily light-polluted skies (Bortle 9\/8\/7\/6).\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eLinear filter with a 4nm FWHM passband, recommended for optical systems from f\/10 to f\/3.5. Compared to the standard Narrowband version, the narrower passband allows for even greater contrast, further reduces the apparent size of stars and reveals the finest details of emission nebulae — essential under heavy urban light pollution.\u003c\/p\u003e\n\n\u003ch2\u003eBaader CMOS-Optimized technology\u003c\/h2\u003e\n\u003cp\u003eThe filter is coated with \u003cstrong\u003eReflex-Blocker™\u003c\/strong\u003e treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with \u003cstrong\u003eLife-Coat™\u003c\/strong\u003e technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cp\u003eAvailable in 7 formats: 1¼\" (31.8mm), 2\" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eS-II Ultra-Narrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength\u003c\/td\u003e\n\u003ctd\u003e671.7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e4 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended optical systems\u003c\/td\u003e\n\u003ctd\u003ef\/10 to f\/3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter thickness\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™, Life-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\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 astrophotographers working under heavily light-polluted skies who want the maximum possible contrast for S-II imaging, or for those who want to purchase the individual filters of the SHO palette separately to complete or replace an existing set. Compatible with filter wheels and most mono CMOS cameras.\u003c\/p\u003e","brand":"Baader-Planetarium","offers":[{"title":"1¼\" (31,8mm)","offer_id":58482441388363,"sku":"BRBP2961475","price":267.0,"currency_code":"EUR","in_stock":true},{"title":"2\" (50,8mm)","offer_id":58482444599627,"sku":"BRBP2961478","price":388.0,"currency_code":"EUR","in_stock":true},{"title":"31mm","offer_id":58482444632395,"sku":"BRBP2961476","price":286.0,"currency_code":"EUR","in_stock":true},{"title":"36mm","offer_id":58482444665163,"sku":"BRBP2961477","price":343.0,"currency_code":"EUR","in_stock":true},{"title":"50,4mm","offer_id":58482444697931,"sku":"BRBP2961479","price":418.0,"currency_code":"EUR","in_stock":true},{"title":"50x50mm","offer_id":58482444730699,"sku":"BRBP2961480","price":427.0,"currency_code":"EUR","in_stock":true},{"title":"65x65mm","offer_id":58482444763467,"sku":"BRBP2961481","price":568.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-s-ii-ultra-narrowband-4nm-114pollice.jpg?v=1789640192"},{"product_id":"antlia-filtro-h-alpha-4-5nm-edge-125","title":"Antlia H-Alpha 4.5nm EDGE Filter 1.25\"","description":"\u003ch2\u003eAntlia H-Alpha 4.5nm EDGE Filter 1.25\" – 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 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\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 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\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 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":58530457780555,"sku":"ANA-HA-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-h-alpha-4-5nm-edge-125-narrowband.jpg?v=1790069974"}],"url":"https:\/\/adriasky.it\/en\/collections\/photo-nebular-filters.oembed?page=3","provider":"Adriasky","version":"1.0","type":"link"}