{"product_id":"antlia-quad-band-anti-light-pollution-filter-2-mounted-quad-2","title":"Antlia Quad Band Anti-Light Pollution Filter 2\" Mounted (QUAD-2)","description":"\u003ch1\u003eAntlia Quad Band Anti-Light Pollution Filter 2\" Mounted\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for color and monochrome cameras. It is able to shoot most deep sky objects like galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 8 location to Bortle 1 as its spectral transmission passes through visible light region, near-ultraviolet (NUV) and near-infrared (NIR) region. Antlia Quad Band filter has a broad bandpass designed to cope with faster optics up to the f\/2 focal ratio.\u003c\/p\u003e\n\u003cp\u003eConsidering the high quantum efficiency (QE) characteristics of the latest cameras in the near-infrared region and this region is less susceptible to artificial light pollution, the Antlia Quad Band Light-Pollution Filter add shigh transmission in the near-infrared (NIR) band. This spectrum design improves image signal-to-noise ratio and contrast by capturing signals in visible bands and NIR region, while also maintaining good color balance and being easier to manage in post-processing. \u003c\/p\u003e\n\u003cp\u003eCertain full-spectrum objects like M51, M83 possess significant signal in the near-infrared (NIR) region, you can possibly capture these deep sky objects more contrasted with the Antlia Quad Band filter under light polluted condition. When using this filter with a camera that has UV\/IR cut protective glass, the visible band transmission signal is retained, but the IR cut limits your ability to capture targets with infrared signal. Therefore, the Antlia Quad Band filter is more suitable for cameras with AR protective glass as they cancapture both NIR and visible band signals.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe main features and application:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnti-Light Pollution\u003cbr\u003eThe Antlia Quad Band filter is an effective solution for reducing light pollution, as it cuts out most of theorange-yellow lights from 589nm and part of blue lights from LEDs\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePossible to shoot over 95% of deep sky objects\u003c\/li\u003e\n\u003cli\u003eUnique spectral design offers more possibilities for astrophotography\u003c\/li\u003e\n\u003cli\u003eHigh transmittance of the main emission lines Ha\/SII\/OIII\/H-Beta in the visible region, enhances the astrophotography's high SNR and contrast;\u003c\/li\u003e\n\u003cli\u003eNear-infrared (NIR) region transmittance\u003c\/li\u003e\n\u003cli\u003ePassing near infrared region is for shooting deep sky objects that cannot be shot with other filters without NIR transmission\u003c\/li\u003e\n\u003cli\u003eThe broad bandpass designed to cope with faster optics up to the f\/2 focal ratio. - Good color balance\u003c\/li\u003e\n\u003cli\u003eIt is easier to achieve color balance by adding the short-wavelength transmission\u003c\/li\u003e\n\u003cli\u003eSuperior optical reliability reduces post image processing\u003c\/li\u003e\n\u003cli\u003eBasic Substrate: Optical, Single \/ Non-glued substrate\u003c\/li\u003e\n\u003cli\u003eSurface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront: Lambda\/4 or better. - Parallelism: less than 30 arcsec\u003c\/li\u003e\n\u003cli\u003eWarranty: 3-years against delamination\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFilter Ring:\u003c\/h2\u003e\n\u003cp\u003eAntlia standard ring:1.25’’ (M28.5*0.6)，2’’(M48*0.75)\u003cbr\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003cbr\u003eBlack Anodized Finish\u003cbr\u003eLaser Engraving No Fading\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eNot Recommended:\u003c\/h2\u003e\n\u003cp\u003eSolar imaging\u003cbr\u003eNight visual observation\u003c\/p\u003e\n\u003ch2\u003eNot Permitted:\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/strong\u003e\u003cbr\u003eSerious eye damage will result if you fail to observe the warning\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" 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rgb(167, 167, 167);\"\u003e\u003cspan style=\"vertical-align: baseline;\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 12pt; font-weight: bold; vertical-align: baseline;\"\u003eH-alpha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eS-II\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eO-III\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eH-beta\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eNII\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd colspan=\"1\" rowspan=\"2\" style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eWavelength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"1\" rowspan=\"2\" style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e656.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e671.6nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e495.9nm,\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"1\" rowspan=\"2\" style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e486.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e658.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e673.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e500.7nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e654.8nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003ePeak Transmission\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eBlocking\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"5\" rowspan=\"1\" style=\"width: 71.0572%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e≥OD4@ 300-1050nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eFilter Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"5\" rowspan=\"1\" style=\"width: 71.0572%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: nowrap; text-align: left; vertical-align: bottom; border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2025_Quad_Band_filter_spectrum_curve.jpg?v=1737230060\u0026amp;width=700\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eAntlia Quad Band Anti-Light Pollution Filter 2\" Mounted\u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAntlia 3-Years Warranty against Delamination\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default 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