{"product_id":"svbony-filter-1-25-uhc-cls-elimination-of-light-pollution-for-astronomy-telescope-eyepiece-observations-of-deep-sky","title":"Svbony Filter 1.25'' UHC \/CLS  Elimination of Light Pollution  for Astronomy Telescope  Eyepiece Observations of Deep Sky","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003esvbony\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFilter Thickness\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e1.85mm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSize\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e1.25inch(31.7mm)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e-\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_image\"\u003e\n\u003cimg style=\"margin-bottom:10px\" class=\"detail-desc-decorate-image\" width=\"930\" height=\"400\" src=\"https:\/\/ae01.alicdn.com\/kf\/Sc496be7ebe5645ce8099ec3a003a6237x.jpg\" slate-data-type=\"image\"\u003e\u003cimg style=\"margin-bottom:10px\" class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H33504f3fe17d47b787abda222b38a99fH.jpg\" slate-data-type=\"image\"\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eSVBONY UHC 1.25'' Filter for Astronomy Telescope Monocular Eyepiece Observations of Deep Space Object\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eBasically, it works by darkening the background so you can see more nebulosity that would otherwise be too faint\u003cbr\u003eThis filter has allowed one to actually see some small planetary nebulae that would otherwise be too washed out by the background to be seen, and I'm able to see more detail and more of the dimmer fringe of larger nebulae like the Orion Nebula, the Dumbbell Nebula, and the Lagoon Nebula.\u003cbr\u003eIt helps with finding the little planetary nebulae because it dims everything but the nebula, i.e. you can look at the same spot with and without the filter, and with the filter in place the stars are dimmed somewhat but the nebula isn't. The nebula is the dot that doesn't get dimmer when you thread in the filter. It works well at both low and high powers, too.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eFeatures:\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e1.Brand New SVBONY 1.25\" UHC filter\u003cbr\u003e2.This filter is perfect for observation of faint and low-contrast deep-sky objects. These features make it perfect for observing nebulae and other deep-sky objects\u003cbr\u003e3.Barrel diameter: 1.25'' simply attach to eyepiece-cased in a sturdy transparent case\u003cbr\u003e4.Significantly reduces light pollution, great for city and suburban observation\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg style=\"margin-bottom:10px\" class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hf37bc86ee84144caa611a8c75fcd5f87P.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eMulti-coated Glass with an lon-assisted Deposition Technology \/Standard 1.25 inch\/M28.5*0.6\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hbb38ef157ada4c139045057275054b887.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eImprove the image contrast of observed objects\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H824663d741aa4595bddc71f4d3c22a3dD.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eCustomer feedback on UHC filters:\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThis broadband (50nm) UHC works well and has allowed me to view nebula (other than M42 \/ Orion Nebula) for the very first time from my light polluted backyard. I never thought I would be able to detect nebula from my backyard, where I do most of my visual observing using 8\" and 10\" F5 dobs. I'm in a red\/white light pollution zone which is considered \"Bortle 8\" aka \"can't see ****, captain\". This filter hits well above its weight and is comparable to a more expensive Optolong UHC filter.\u003cbr\u003e\u003cbr\u003eEven with most of my city using LED street lights, whose light pollution is harder to filter out, this filter performed exceptionally and allowed me to detect nebulosity in Scorpius last night. The nebulosity was faint, but it was absolutely there. I didn't need to use averted vision or any other aids to detect it. With visual observing, you can't expect bright Hubble views albeit I suspect this filter would work exceptionally well for astrophotographers, who will be able to achieve great results with this filter + long exposures. The fact that I could visually detect any nebula at all that wasn't M42 in Orion makes this worth the measly $20 paid.\u003cbr\u003e\u003cbr\u003eMembers of a popular astronomy forum have sent the SVbony UHC filters out to Lumicon- one of the top optics and filter labs- and it revealed that this filter is virtually identical in performance to Optolong UHC filter and may even be the same thing. The Optolong is well regarded and sells for $80; a $20 SVbony performing the same as a filter that is 4X as expensive is a great deal.\u003cbr\u003e\u003cbr\u003eThe price and the performance of this makes it a must have filter if you don't have one. I'm not a fan of filters as I find the price:performance underwhelming for visual observing, but this filter hits all the right notes. I will likely buy SVbony of this filter, I like its performance enough that I want it available for my  wide field EPs. I wish SVbony made an OIII; I'd buy it in a heartbeat if it performed as well as this UHC.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eSVBONY  CLS 1.25\" Deep Sky Filter for Astronomy Monocular Telescope Eyepiece Cut Light Pollution Visual \u0026amp; Astronomical\u003c\/p\u003e\n\u003cp\u003eSVBONY Urban Light Suppression Broadband Filters are designed to enhance the visibility of a variety of deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, particularly those produced by artificial lighting, including high-pressure and low-pressure sodium vapor lamps, and unwanted natural light caused by neutral oxygen emissions in the atmosphere (i.e., sky glow). Combined with the high transparency of the OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) and SII (672nm) main nebula emission lines, this filter is suitable for Enhance contrast and detail for suburban visual and photographic purposes.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eFeatures:\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003e1.Multi-layers anti-reflection coating\u003cbr\u003e2.Non-cementing optical substrate coating\u003cbr\u003e3.Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching\u003cbr\u003e4.Stability on CWL (central wavelength) no deviation affected by temperature change\u003cbr\u003e5.For planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003cbr\u003e6.Ultra-thin filter cell minimize vignetting by maximize possible\u003cbr\u003e7.Aerometal Material Precise CNC Machining Sand Blasting,process Black Anodized Finish Extinction Treatment to Prevent Reflection Laser Engraving No Fading\u003cbr\u003e8.90% transmission of main nebula emission lines (i.e. Ha 656nm, OIII 496nm\u0026amp;500nm, SII672nm and H-beta 486nm).\u003cbr\u003e9.0.1% transmission of off-band, specifically the major emission lines of artificial light pollution\u003cbr\u003e10.Suitable for color CCD cameras and unmodified DSLRs\u003cbr\u003e11.CLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution.\u003cbr\u003e12.Light pollution filter do not eliminate the effects of light pollution or increase the object ' s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_image\"\u003e\u003cimg style=\"margin-bottom:10px\" class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H0d54fd09f904467b9c11721c2cc520dai.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eMulti-coated Glass with an lon-assisted Deposition Technology\/Standard 1.25 inch\/M28.5*0.6\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H042b92299619409a989cd1608f5b3ec4d.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eThe effect of using CLS filter\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/H86a6d41e2f5e45d49b3ed6718b270520V.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text-image\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eHow to use it?\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Hc65cdb770fba4e6c8a8c24f87c5d28cbu.jpg\" slate-data-type=\"image\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003eHow this filter works\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003eThe CLS has a wider pass-band than a narrower UHC filter, so it gives a more natural colour response than a UHC filter. CLS is therefore best for mild to moderate light pollution filter for suburban skies.\u003cbr\u003e\u003cbr\u003eThe filter selectively allows light from deepsky objects through, with high transmission of ionised oxygen O-III (496nm \u0026amp; 500nm), Hydrogen Beta \/ N-beta (486nm), N-II(654nm and 658nm), H-alpha(656nm) and S-II(672nm).\u003cbr\u003e\u003cbr\u003eBy selectively blocking light pollution and transmitting these desirable wavelengths, the contrast and detail of deepsky objects is greatly enhanced.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"detailmodule_text\"\u003e\n\u003cp style=\"font-family:OpenSans;font-size:20px;font-weight:900;line-height:28px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-title\"\u003ePackage Details:\u003c\/p\u003e\n\u003cp style=\"font-family:OpenSans;font-size:14px;font-weight:300;line-height:20px;white-space:pre-wrap;color:rgb(0, 0, 0);margin-bottom:12px\" class=\"detail-desc-decorate-content\"\u003ePackage 1:1*1.25'' UHC filter\u003cbr\u003ePackage 2:1*1.25'' UHC filter+1*1.25'' CLS filter\u003cbr\u003ePackage 3:1*1.25'' CLS filter\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S3fa25045954246cca1cb926e41a8dec6H.png\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"iset-shop","offers":[{"title":"UHC Filter \/ brazil","offer_id":43491695394875,"sku":"14:1052#UHC Filter;200007763:203054829","price":137.9,"currency_code":"USD","in_stock":true},{"title":"UHC Filter \/ Russian Federation","offer_id":43491695427643,"sku":"14:1052#UHC Filter;200007763:201336103","price":78.9,"currency_code":"USD","in_stock":true},{"title":"UHC Filter \/ spain","offer_id":43491695460411,"sku":"14:1052#UHC Filter;200007763:201336104","price":78.9,"currency_code":"USD","in_stock":true},{"title":"UHC Filter \/ United States","offer_id":43491695493179,"sku":"14:1052#UHC Filter;200007763:201336106","price":85.9,"currency_code":"USD","in_stock":true},{"title":"UHC- CLS Filter \/ spain","offer_id":43491695525947,"sku":"14:10#UHC- CLS Filter;200007763:201336104","price":154.9,"currency_code":"USD","in_stock":true},{"title":"UHC- CLS Filter \/ United States","offer_id":43491695558715,"sku":"14:10#UHC- CLS Filter;200007763:201336106","price":171.9,"currency_code":"USD","in_stock":true},{"title":"CLS Filter \/ CN","offer_id":43491695591483,"sku":"14:496#CLS Filter;200007763:201441035","price":85.9,"currency_code":"USD","in_stock":true},{"title":"CLS Filter \/ brazil","offer_id":43491695624251,"sku":"14:496#CLS Filter;200007763:203054829","price":137.9,"currency_code":"USD","in_stock":true},{"title":"CLS Filter \/ Russian Federation","offer_id":43491695657019,"sku":"14:496#CLS Filter;200007763:201336103","price":78.9,"currency_code":"USD","in_stock":true},{"title":"CLS Filter \/ spain","offer_id":43491695689787,"sku":"14:496#CLS Filter;200007763:201336104","price":78.9,"currency_code":"USD","in_stock":true},{"title":"CLS Filter \/ United States","offer_id":43491695722555,"sku":"14:496#CLS Filter;200007763:201336106","price":85.9,"currency_code":"USD","in_stock":true},{"title":"UHC Filter \/ CN","offer_id":43491695755323,"sku":"14:1052#UHC Filter;200007763:201441035","price":85.9,"currency_code":"USD","in_stock":true},{"title":"UHC- CLS Filter \/ CN","offer_id":43491695788091,"sku":"14:10#UHC- CLS Filter;200007763:201441035","price":173.9,"currency_code":"USD","in_stock":true},{"title":"UHC- CLS Filter \/ brazil","offer_id":43491695820859,"sku":"14:10#UHC- CLS Filter;200007763:203054829","price":239.9,"currency_code":"USD","in_stock":true},{"title":"UHC- CLS Filter \/ Russian Federation","offer_id":43491695853627,"sku":"14:10#UHC- CLS Filter;200007763:201336103","price":154.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/6526\/5723\/files\/A4d2c3610f401498bb23d66a3e2b0d298b.webp?v=1778173313","url":"https:\/\/iset-shop.online\/products\/svbony-filter-1-25-uhc-cls-elimination-of-light-pollution-for-astronomy-telescope-eyepiece-observations-of-deep-sky","provider":"iset-shop","version":"1.0","type":"link"}