{"title":"Featured Optolong Equipment","description":null,"products":[{"product_id":"optolong-sho-filters-set-3nm","title":"Optolong SHO Filters set 3nm","description":"\u003ch2\u003eNew 3nm Ultra Narrowband Astronomy Filters from Optolong\u003c\/h2\u003e\n\u003cp\u003eThis premium narrowband filter set includes \u003cstrong\u003eSII (3nm)\u003c\/strong\u003e, \u003cstrong\u003eH-Alpha (3nm)\u003c\/strong\u003e, and \u003cstrong\u003eOIII (3nm)\u003c\/strong\u003e filters, designed for high-resolution astrophotography of emission nebulae using monochrome CCD and CMOS cameras.\u003c\/p\u003e\n\u003cp\u003eUltra-narrowband imaging allows productive astrophotography even under strong moonlight or severe light-polluted skies, making it possible to maximise imaging opportunities on every clear night.\u003c\/p\u003e\n\u003cp\u003eData captured through each filter can be combined into a full-colour final image. A common approach is the \u003cstrong\u003eHOO palette\u003c\/strong\u003e, using H-alpha for the red channel and OIII for both green and blue channels. H-alpha data can also be blended into RGB images to significantly enhance contrast and fine structural detail while preserving a natural colour balance.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eH-Alpha 3nm Filter:\u003c\/b\u003e The most widely used narrowband filter for deep-sky imaging, passing a precise 3nm bandwidth centred at \u003cstrong\u003e656nm\u003c\/strong\u003e. This filter strongly suppresses artificial light sources such as mercury vapour and sodium street lighting, as well as natural skyglow caused by atmospheric oxygen emission. The result is exceptionally high contrast and the ability to reveal delicate nebular structures that are otherwise lost in broadband imaging.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOIII 3nm Filter:\u003c\/b\u003e Designed for imaging emission nebulae at the \u003cstrong\u003e500nm\u003c\/strong\u003e oxygen-III emission line, allowing a 3nm bandwidth to pass. This filter effectively blocks artificial light pollution and unwanted atmospheric glow. OIII emission occurs at 495.9nm and 500.7nm, producing a characteristic blue-green colour. Many planetary nebulae and supernova remnants are imaged using only H-alpha and OIII filters, producing images with strong structure and naturally balanced colour similar to RGB data.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSII 3nm Filter:\u003c\/b\u003e Optimised for imaging nebulae at the sulphur-II emission line centred at \u003cstrong\u003e672nm\u003c\/strong\u003e. With a narrow 3nm bandwidth, this filter efficiently blocks artificial light pollution and atmospheric skyglow, making it ideal for SHO (Hubble Palette) imaging where sulphur data adds depth and contrast to complex nebular regions.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIMPORTANT:\u003c\/b\u003e \u003cstrong\u003eOptolong filters are NOT designed for solar observation or solar photography.\u003c\/strong\u003e DO NOT use these filters to observe or photograph the Sun. Doing so will result in \u003cstrong\u003epermanent eye damage\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"product_features\"\u003e\n\u003ch2\u003eFEATURES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e85%+ transmission within the passband with precision off-band blocking\u003c\/li\u003e\n\u003cli\u003eInfrared wavelengths from 700–1000nm effectively blocked\u003c\/li\u003e\n\u003cli\u003eOff-band transmission limited to 0.1%, suppressing major artificial light pollution lines (Na 589nm, Hg 435nm \u0026amp; 578nm)\u003c\/li\u003e\n\u003cli\u003eSuitable for use with monochrome CCD and CMOS cameras\u003c\/li\u003e\n\u003cli\u003eAvailable in 2\" mounted or 36mm unmounted formats\u003c\/li\u003e\n\u003cli\u003eSupplied in a protective plastic case with EVA foam lining\u003c\/li\u003e\n\u003cli\u003eOptical glass thickness: 2mm (36mm), 1.85mm (2\")\u003c\/li\u003e\n\u003cli\u003eDouble-sided fine optical polishing ensures λ\/4 wavefront accuracy and \u0026lt;30 arc-second parallelism\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTransmission Chart\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Optolong SHO 3nm narrowband filter transmission chart\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong_sho_3nm_transmission_chart.png?v=1769975587\"\u003e\u003c\/p\u003e\n\u003cp\u003eSII Line: H-Alpha, 3nm centred at 656nm.\u003c\/p\u003e\n\u003cp\u003eGreen Line: SII, 3nm centred at 672nm.\u003c\/p\u003e\n\u003cp\u003eBlue Line: OIII, 3nm centred at 500nm.\u003c\/p\u003e\n\u003ch2\u003eTechnical Data\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSchott optical glass substrate\u003c\/li\u003e\n\u003cli\u003eThickness: 2.0mm (36mm), 1.85mm (2\")\u003c\/li\u003e\n\u003cli\u003eSurface Quality: 60\/40 (MIL-O-13830 standard)\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to λ\/4 wavefront accuracy\u003c\/li\u003e\n\u003cli\u003e\u0026lt;30 arc-second parallelism\u003c\/li\u003e\n\u003cli\u003e85%+ transmission at passband\u003c\/li\u003e\n\u003cli\u003eInfrared cut-off from 700–1000nm\u003c\/li\u003e\n\u003cli\u003eHigh-precision off-band blocking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCoating Parameter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layer anti-reflection coatings\u003c\/li\u003e\n\u003cli\u003eNon-cemented optical substrate coating\u003c\/li\u003e\n\u003cli\u003eElectron-beam evaporation with ion-assisted deposition for enhanced durability and scratch resistance\u003c\/li\u003e\n\u003cli\u003eExcellent central wavelength stability with minimal temperature-induced shift\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation coating system ensures uniform coating density and high optical performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFilter Cell\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-thin filter cell minimises vignetting while maximising clear aperture\u003c\/li\u003e\n\u003cli\u003eClear aperture: 26mm (1.25\"), 45mm (2\")\u003c\/li\u003e\n\u003cli\u003eAerometal construction with precision CNC machining\u003c\/li\u003e\n\u003cli\u003eSand-blasted, black-anodised finish with internal anti-reflection treatment\u003c\/li\u003e\n\u003cli\u003eLaser-engraved markings for permanent identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSample Images\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"NGC7000 narrowband astrophotography image\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong_sho_3nm_sample_1.jpg?v=1769975589\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNGC7000 © Tommaso Massimo Stella\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"NGC6960 Veil Nebula narrowband image\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong_sho_3nm_sample_2.jpg?v=1769975589\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNGC6960 © Andrea Andreotto Maggi Astrophoto\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Optolong H-alpha 3nm filter test image\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong_sho_3nm_sample_3.png?v=1769975589\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eH-Alpha 3nm Test © YaGe\u003c\/b\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"2\"","offer_id":42296205213873,"sku":null,"price":599.0,"currency_code":"GBP","in_stock":true},{"title":"36mm","offer_id":42296218058929,"sku":null,"price":643.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Optolong-H-alpha-OIII-SII-3nm-narrowband-filter-HSO-set-2-inch-1000x1000w.webp?v=1769974573"},{"product_id":"optolong-h-alpha-3nm-filters","title":"Optolong H-alpha 3nm Filters","description":"\u003cdiv data-mce-fragment=\"1\" class=\"container\" data-ipvsetting='{\"autoplay\":0,\"nocookie\":0 }' id=\"product-product\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"row\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"\" id=\"content\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"product-blocks blocks-default\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"tabs-container product_extra product_tabs product_tabs-default\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"tab-content\"\u003e\n\u003cdiv data-mce-fragment=\"1\" id=\"product_tabs-2\" class=\"product_extra-331 tab-pane active\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"block-body expand-block\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"block-wrapper\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"block-content\"\u003e\n\u003ch1 data-mce-fragment=\"1\"\u003eOptolong H-alpha 3nm Ultra Narrow Band Deep Sky Imaging Filter 2\" for CCD\/CMOS Astro Photography\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHere below you will find a description of all three types of filters for your information as a full bundle is also available, however \u003c\/span\u003e\u003cb data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ethis product listing is only for the Optolong 3nm H-alpha filter. \u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePlease note, if you buy the full HSO bundle you will save some money in comparison to the price of the individual items.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eGeneral Product Description for All Versions\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Optolong SHO-3nm filter kit (available separately) includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe extra narrowband SIICCD3nm filter  (Sulphur II for CCD) is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe ultra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission line, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernoval remnants are taken only with H-Alpha and OIIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eMain Use and Performance of the H-alpha Filter (this product listing)\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe H-Alpha 3nm filter is a popular narrowband filter allowing 3nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure vapor lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow). Better choice of narrowband H-Alpha astrophotographer filter for highest contrast and revealing subtle nebula details. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eFeatures\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eGive you higher contrast and greater detailed viewing;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDecrease background noise and improve the contrast of the object;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIncrease the faint nebula signal and make it brighter;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWith a narrow band fitlers kit you are able to process a Hubble-like image (Hubble-palette);\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThrough the optimization of the substrate and upgraded coating technology.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWARNING:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOptolong filters are not designed for solar observation. DO NOT LOOK AT THE SUN WITH ANY OPTOLONG FILTER as permanent eye damage will be the result.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eTechnical Data\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSubstrate material\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGlass thickness  of 2\" version: 1.85mm;\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGlass thickness of 36mm version: 2.0mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt; 30 seconds parallelism over both surfaces\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e85-86% transmission at major OIII line at 500nm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLight pollution emission is blocked \u0026gt;99.9%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eFilter Cell (only for filters in a cell)\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUltra-thin filter cell minimise vignetting by maximising possible clear aperture (clear aperture is 26mm for 1.25” size and 45mm for 2” size)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAerometal Material\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePrecise CNC Machining\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSand Blasting Process\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eExtinction Treatment to Prevent Reflection\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLaser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eAvailable Sizes\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eStandard 2”\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRound 36mm Unmounted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003ePackaging\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlastic PP Case\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eImported High Pressure EVA Case Lining\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSilver Cardboard Box\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHigh Density Sponge Carton Lining\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eOptical Coating\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band. (Please note, \"planetary rotation system\" is a type of optical coating process and does not refer to the astronomical system describing the motion of the planets in our solar system.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Major Emission Lines of Nebulae: H-α 656.3nm, H-β486.1nm, OIII 495.9nm, OIII 500.7nm \u003cbr data-mce-fragment=\"1\"\u003eThe Major Emission Lines of Artificial Light Pollution: Hg 435.8nm, 546.1nm, 577nm, 578.1nm, Na 598nm, 589.6nm, 615.4nm, 616.1nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch1 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOptolong SHO-3nm Narrowband Filters Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAs we all know, OIII narrow band filters always had a problem with halos around brigth stars. Thanks to Optolongs long standing experiences with their 7nm narrow band filters, the halo of OIII 3nm filter was optimized by improving the coating technology. Here we also conducted a qualitative halo test of the bright star of the Veil Nebula, and it can be seen from the original picture that the OIII 3nm performs very well on the bright star.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTelescope：RASA 11 at f2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCamera：QHY 600\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eMount:艾顿 IOptron CEM120\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOptolong OIII-3nm single 10min\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCopyright: \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eWuzhen\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\" alt=\"\" data-mce-src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eI. \u003cu data-mce-fragment=\"1\"\u003eThe Bubble Nebula (NGC 7635)  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eAstrodoc Ron Brecher \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAcquisition, focusing, and control of Paramount MX mount with N.I.N.A., TheSkyX and PHD2. Focus with Optec DirectSync motor and controller. Equipment control with PrimaLuce Labs Eagle 4 Pro computer. All pre-processing and processing in PixInsight. Acquired from Ron‘s \u003ca data-mce-fragment=\"1\" href=\"https:\/\/skyshed.com\/\" data-mce-href=\"https:\/\/skyshed.com\/\"\u003eSkyShed\u003c\/a\u003e in Guelph. Average transparency and seeing. Data acquired Oct 18-19, 2021 under a brightly moonlit sky (Moon 12 days old)..\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSky-Watcher Esprit 150 f\/7 refractor and QHY600M camera with Optolong H-alpha, O(III) and S(II) 3nm filters – FIRST LIGHT WITH OPTOLONG 3nm BANDPASS FILTERS\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHa: 9 x 20m = 3hr00m\u003cbr data-mce-fragment=\"1\"\u003eO3: 10 x 20m = 3hr20m\u003cbr data-mce-fragment=\"1\"\u003eS2: 9 x 20m = 3hr00m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTotal: 9hr20m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eImage scale 0.72 arcsec per \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003epixel \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\" alt=\"\" data-mce-src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅡ.\u003cu data-mce-fragment=\"1\"\u003e Pacman Nebula NGC 281 in the Hubble Palette  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eLuca Fornaciari Astrophotography  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePacman Nebula NGC 281 in the Hubble Palette\u003cbr data-mce-fragment=\"1\"\u003eWith the bad weather persisting I have taken these last few weeks to experiment with new way in the development of narrowband shots.\u003cbr data-mce-fragment=\"1\"\u003eI'm happy because I'm defining a Hubble Palette that really feels mine, designing it a little at a time.\u003cbr data-mce-fragment=\"1\"\u003eNarrowband is creative and fun because it allows us a good deal of freedom to experiment with the integration of the individual channels and the image you see is a developing version of what I am building.\u003cbr data-mce-fragment=\"1\"\u003eThe image was obtained with the new 3nm Optolong filters. If the bad weather will allow me a few nights I will soon finish my tests on these filters, but for now the impressions are really good.\u003cbr data-mce-fragment=\"1\"\u003e240 minutes of Ha, 510 of OIII and 260 minutes of SII with the ASI 294MM and the Sky-Watcher 300 f\/4.\u003cbr data-mce-fragment=\"1\"\u003eI wish you a beautiful sunny day!\u003cbr data-mce-fragment=\"1\"\u003eSETUP:\u003cbr data-mce-fragment=\"1\"\u003eSky-Watcher 300 f \/ 4 on EQ8R-Pro\u003cbr data-mce-fragment=\"1\"\u003eZWO ASI 294MM, \u003cstrong data-mce-fragment=\"1\"\u003eOptolong Filters Ha 3nm, OIII 3nm, SII \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003e3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\" data-mce-href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\"\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\" alt=\"\" data-mce-src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"2\"","offer_id":42296265703601,"sku":null,"price":388.8,"currency_code":"GBP","in_stock":true},{"title":"36mm","offer_id":42296265736369,"sku":null,"price":329.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-h-alpha-3nm-filters-545031.webp?v=1718364480"},{"product_id":"optolong-l-enhance-filter-triple-bandpass-for-light-pollution-imaging","title":"Optolong L-eNhance Filter – Triple-Bandpass for Light Pollution Imaging","description":"\u003ch1\u003eThe Optolong L-eNhance Filter - Triple-Bandpass for Light Pollution\u003c\/h1\u003e\n\n\u003cp\u003eDesigned to maximise your imaging potential under light-polluted skies, the \u003cb\u003eOptolong L-eNhance Filter \u003c\/b\u003eis a triple-bandpass narrowband filter, ideal for DSLR, color CMOS, and CCD cameras. It isolates key nebula emission lines like H-alpha, H-beta, and OIII, with up to 90% transmission efficiency.\u003c\/p\u003e\n\n\u003ch2\u003eOptolong L-eNhance Filter Key Features\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLight Pollution Solution:\u003c\/strong\u003e Blocks unwanted light while allowing critical emission lines to pass, making it ideal for urban imaging.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDesigned for Color Cameras:\u003c\/strong\u003e Ideal for DSLR and color CMOS cameras, providing a practical and economical alternative to monochrome setups with multiple filters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh Transmission:\u003c\/strong\u003e Allows up to 90% transmission of H-alpha, H-beta, and OIII nebula emission lines for crisp, clear images.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSubstrate:\u003c\/td\u003e\n            \u003ctd\u003eB270\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eThickness:\u003c\/td\u003e\n            \u003ctd\u003e1.85mm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eTpeak:\u003c\/td\u003e\n            \u003ctd\u003eT\u0026gt;90%\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eBlocking range:\u003c\/td\u003e\n            \u003ctd\u003e300-1000nm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eBlocking depth:\u003c\/td\u003e\n            \u003ctd\u003eLight pollution blocking \u0026gt;99%\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSurface quality:\u003c\/td\u003e\n            \u003ctd\u003e60\/40\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n            \u003ctd\u003eλ\/4\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eParallelism (arcsec):\u003c\/td\u003e\n            \u003ctd\u003e30s\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eAvailable Sizes\u003c\/h2\u003e\n\u003cp\u003eCurrently available in 1.25\" and 2\" mounted options. Other sizes will be listed when available.\u003c\/p\u003e\n\n\u003ch2\u003eSample Images\u003c\/h2\u003e\n\u003cp\u003eImaging target: Vela Supernova Remnant\u003cbr\u003e\nCamera: CentralDS Astro A7s (cooled)\u003cbr\u003e\nLens: Canon EF 300mm f\/4L (non-IS)\u003cbr\u003e\nFilter: Optolong L-eNhance\u003cbr\u003e\nISO: 6400\u003cbr\u003e\nExposure: 1min x 81 frames\u003cbr\u003e\nProcess: PI, PS CC\u003c\/p\u003e\n\n\u003ch2\u003eOrder Your Optolong L-eNhance Filter Today\u003c\/h2\u003e\n\u003cp\u003eElevate your astrophotography with the \u003cstrong\u003eOptolong L-eNhance Filter\u003c\/strong\u003e, the ideal solution for light-polluted skies. Order now at Dark Clear Skies and capture stunning nebula details with ease.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":42296580735153,"sku":"OPT-L-eNh-1.25","price":116.0,"currency_code":"GBP","in_stock":true},{"title":"2\"","offer_id":42296580767921,"sku":"OPT-L-eNh-2","price":149.0,"currency_code":"GBP","in_stock":true},{"title":"EOS-C","offer_id":42296584667313,"sku":"OPT-L-eNh-EOS-C","price":175.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-l-enhance-filters-965906.webp?v=1718364490"},{"product_id":"optolong-l-extreme-filter","title":"Optolong L-eXtreme Filter","description":"\u003ch3\u003eOptolong L-eXtreme Filter – Best Light Pollution Filter for Astrophotography\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eOptolong L-eXtreme Filter\u003c\/strong\u003e is one of the most advanced light pollution filters available, engineered to allow astrophotographers to capture high-contrast celestial images under light-polluted skies. With a focus on the \u003cstrong\u003eH-alpha and OIII emission lines\u003c\/strong\u003e, this dual narrowband filter provides superior image clarity, even in urban environments. Whether you’re using a \u003cstrong\u003eDSLR, CCD, or CMOS camera\u003c\/strong\u003e, the L-eXtreme filter enables you to capture detailed nebulae and other deep-sky objects with remarkable accuracy.\u003c\/p\u003e\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTargets \u003cstrong\u003eH-alpha (656.3nm)\u003c\/strong\u003e \u0026amp; \u003cstrong\u003eOIII (495.9nm, 500.7nm) emission lines\u003c\/strong\u003e for enhanced nebula imaging.\u003c\/li\u003e\n\u003cli\u003eEliminates 99.9% of light pollution, blocking major artificial light sources like mercury (Hg) and sodium (Na) vapor lamps.\u003c\/li\u003e\n\u003cli\u003eAchieves an impressive 93% transmission rate, ensuring high signal clarity and sharp contrast.\u003c\/li\u003e\n\u003cli\u003eIdeal for use with \u003cstrong\u003eDSLRs, CCDs, and CMOS cameras\u003c\/strong\u003e for astrophotography enthusiasts of all skill levels.\u003c\/li\u003e\n\u003cli\u003eSuitable for capturing nebulae, galaxies, and star clusters under heavily light-polluted skies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow the Optolong L-eXtreme Works:\u003c\/h2\u003e\n\u003cp\u003eThis filter is designed to isolate the narrow emission lines of deep-sky nebulae, specifically \u003cstrong\u003eH-alpha and OIII\u003c\/strong\u003e, while blocking out the majority of artificial light pollution. It's perfect for capturing emission nebulae such as the Orion Nebula (M42), the Horsehead Nebula (IC 434), and planetary nebulae like the Ring Nebula (M57). By targeting these specific wavelengths, the L-eXtreme filter ensures higher contrast and more detailed astrophotographs.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications:\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eOptolong L-eXtreme Filter\u003c\/strong\u003e is optimized for deep-sky astrophotography, particularly for emission nebulae. Here’s what makes it special:\u003c\/p\u003e\n\u003ch3\u003eMajor Emission Lines Targeted:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eH-alpha (656.3nm)\u003c\/strong\u003e – The red emission line emitted by hydrogen atoms, found in many nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eH-beta (486.1nm)\u003c\/strong\u003e – A complementary emission line emitted by hydrogen atoms, also targeted for nebula imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOIII (495.9nm, 500.7nm)\u003c\/strong\u003e – Emission lines from doubly ionized oxygen, often found in planetary and emission nebulae.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eArtificial Light Pollution Blocked:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercury (Hg) lines\u003c\/strong\u003e: 435.8nm, 546.1nm, 577nm, 578.1nm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium (Na) lines\u003c\/strong\u003e: 598nm, 589.6nm, 615.4nm, 616.1nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Optolong continuously optimizes the performance of this filter based on real-world testing, so technical data may be subject to updates.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eAvailable Sizes:\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eOptolong L-eXtreme Filter\u003c\/strong\u003e is available in the following sizes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e1.25” mounted\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2” mounted\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOther sizes will be listed as they become available.\u003c\/p\u003e\n\u003ch2\u003eAstrophotography Results:\u003c\/h2\u003e\n\u003cp\u003ePhotographers around the world have achieved breathtaking images using the Optolong L-eXtreme Filter, even under severe light pollution conditions. Whether you're working with a \u003cstrong\u003eDSLR camera\u003c\/strong\u003e or a more advanced \u003cstrong\u003eCCD\/CMOS setup\u003c\/strong\u003e, this filter helps you capture intricate details of nebulae and other deep-sky objects, making it a must-have for astrophotographers in urban environments.\u003c\/p\u003e\n\u003ch3\u003eExample Captures with the Optolong L-eXtreme:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eObject:\u003c\/strong\u003e M42 (Orion Nebula)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera:\u003c\/strong\u003e ZWO ASI183MC Pro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope:\u003c\/strong\u003e Sky-Watcher N130\/650 with coma corrector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e iOptron CEM25EC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide:\u003c\/strong\u003e 120mm mini guide scope, ZWO ASI120MM mini\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Pollution:\u003c\/strong\u003e Level 7–8 (City center, high light pollution area)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Example:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eObject:\u003c\/strong\u003e NGC6946, Barnard 150, and Sh2-129 Flying Bat Nebula\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera:\u003c\/strong\u003e Canon 6D (modified) + WO SpaceCat 51\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilters:\u003c\/strong\u003e Optolong L-eXtreme \u0026amp; L-Pro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eData:\u003c\/strong\u003e RGB 25 x 600\" ISO 3200 (Optolong L-Pro) \/ H-Alpha \u0026amp; OIII 20 x 1500\" ISO 3200 (Optolong L-eXtreme)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Details:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-quality silver cardboard box for storage\u003c\/li\u003e\n\u003cli\u003ePlastic PP box for added durability\u003c\/li\u003e\n\u003cli\u003eImported high-pressure EVA case lining to protect your filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose the Optolong L-eXtreme Filter?\u003c\/h2\u003e\n\u003cp\u003eWhether you’re an experienced astrophotographer or a hobbyist looking to take your images to the next level, the \u003cstrong\u003eOptolong L-eXtreme Filter\u003c\/strong\u003e is a powerful tool that delivers incredible results. Its ability to cut through light pollution, combined with its high transmission rates, makes it a top choice for capturing nebulae, galaxies, and other deep-sky objects.\u003c\/p\u003e\n\u003ch2\u003eGet Yours Now!\u003c\/h2\u003e\n\u003cp\u003eThe Optolong L-eXtreme Filter is available for immediate purchase in \u003cstrong\u003e1.25” mounted\u003c\/strong\u003e and \u003cstrong\u003e2” mounted\u003c\/strong\u003e sizes. Upgrade your astrophotography gear today and start capturing the cosmos in stunning detail, even from the heart of the city.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":42296588239025,"sku":"OPT-L-eXtr-1.25","price":163.0,"currency_code":"GBP","in_stock":true},{"title":"2\"","offer_id":42296588271793,"sku":"OPT-L-eXtr-2","price":193.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-l-extreme-filter-121106.jpg?v=1718364497"},{"product_id":"optolong-l-pro-filters","title":"Optolong L-PRO Filters","description":"\u003ch2\u003e\u003cspan\u003e\u003cstrong\u003eL-Pro Introduction \u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cstrong\u003e\u003cspan\u003eOptolong L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). \u003c\/span\u003e\u003c\/strong\u003e\n\u003cp\u003e\u003cspan\u003eTogether with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for visual observation and astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLight 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\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003eWARNING\u003c\/u\u003e: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOptical glass fine material\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSpectrum: 380-750nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt; 30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHigh transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm\u0026amp;500nm, SII 672nm and H-beta 486nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePrecision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e2. L-Pro Spectrum and \u003c\/strong\u003e\u003cstrong\u003eCharacteristic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20210703\/eb917cc4efb4f6591d2d660c9922c256.png\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHow to read the chart?\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The RED line shows the transmission of the filter. The artifical emission lines are shown in ORANGE. And the emission lines from constellation are shown in GREEN.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e3. Coating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e·Multi-layers anti-reflection coating\u003c\/p\u003e\n\u003cp\u003e·Non-cementing optical substrate coating\u003c\/p\u003e\n\u003cp\u003e·Optolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/p\u003e\n\u003cp\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"http:\/\/optolong.com\/uploads\/images\/20200716\/22c5068a8f4783079f93c42761aa9238.png\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e4. Gloable Price\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable align=\"center\" border=\"1\" cellpadding=\"1\" cellspacing=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eL-Pro Gloable MAP                      \u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e     Unit Price in USD dollars    \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e1.25\"(1 1\/4\" mounted)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e$149.00\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e2\" mounted\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e$199.00\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eM77 mounted\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e$289.00\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eEOS-C clip\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e$249.00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eEOS-FF clip\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e$269.00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eNK-FF clip\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e$269.00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eSony-FF clip\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e$269.00\u003c\/span\u003e\u003c\/strong\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\u003cspan\u003e\u003cstrong\u003e5.Package \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/f778991ef77732079f9b4bfa1f7010d4.png\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/9be9f501063812f34002518b35d63397.png\"\u003e\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e2019 NEW package\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/3560d00b15da118371c12766c074710d.png\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/497e351dc95fe824244ce6bf6135cbd0.png\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e6. Optolong L-Pro Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eI Comparason image was shot by Arnaud Besancon\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures have been realised with 5D3 Astrodon modded and Samyang 24mm F1,4 at F2, 13s exp. time,3600 isos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures are raw,without post-process\u003cbr\u003e.\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/1f41cc683d82eb630d00c0a1b720cc7d.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eII The Vortex galaxy by \u003cu\u003eLuca Fornaciari Astrophotography\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong Astronomy Filter L-Pro 2''\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/63dbffff45a843a389c78f87a4419a8f.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIII Ran into Red Sprite again©\u003cu\u003eVincent Cheng\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Red Sprite is a TLEs (Transient Luminous Events) from the atmosphere, and is part of a family of small creatures that also include even harder to photograph, from rogue sprites to blue jets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eby \u003ca dir=\"ltr\" href=\"https:\/\/twitter.com\/Optolong_filter\"\u003eOptolong_filter\u003c\/a\u003e  2\" L-Pro filter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/ca216bf0ad6c1a5443e818c95f5f8ff1.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eⅣ When the skies were absolutely STEADY, \u003cu\u003eJim Mayercak\u003c\/u\u003e shot this Luna\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ecannot recall EVER having such good \"seeing\" conditions. The most beautiful Lunar shot to date.Celestron CGEM DX 1100 EDGE HD ZWO ASI071PRO\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Pro filter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/2ef3b8715943c9ac74dbae7b56e92f82.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eV Here the final Image of comet 46\/P Wirtanen and the Pleiades, shot by \u003cu\u003eBlake Estes\u003c\/u\u003e.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis imaging run ended up being a marathon that took about 22 hours of processing, using Optolong L-Pro filter for imaging. Its absolutely perfect!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/2a16eb558c57ca48867aca785b779b84.png\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eⅥ.  Veil Nebula shot by \u003cu\u003eAndrea Andreotto Maggi\u003c\/u\u003e with Optolong L-Pro filter 2''\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe L-Pro filter filter allowed me to obtain long poses without saturating the stars and to obtain a good separation between the nebula and the sky background while keeping the colors unaltered.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20191111\/768c5042c97e131f6d9e82b2ca0f9676.jpg\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVII. M33, imaged by Valerio Avitabile(Italy)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTecnosky apo 102\/714 ridotto a 585mm\u003cbr\u003eEQ6-R mount\u003cbr\u003eAsi294 pro raffreddata a -10°\u003cbr\u003eGuida con Artesky 60\/240 e Asi224mc\u003c\/p\u003e\n\u003cp\u003e85x300sec gain120 con filtro\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eOptolong L-Pro 2\"\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cbr\u003e41 Dark ,35 flat, 25 darkflat \u003c\/p\u003e\n\u003cp\u003eAstro photography tools, Phd2 Guiding, eqmod, PixInsight 1.8 e photoshop\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003ca href=\"http:\/\/https\/\/www.facebook.com\/photo?fbid=2039177929548968\u0026amp;set=gm.611697359521466\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20200921\/a4b729a70cce05981875d0f9115d027f.jpg\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About color: due to the influence of ambient light, color difference of the display and flash photography, the color of the product may have some color difference. Detailed color is in accordana with the final product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About coating: the interference filter will show different colors under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":42296597217457,"sku":"OPT-L-PRO-1.25","price":97.0,"currency_code":"GBP","in_stock":true},{"title":"2\"","offer_id":42296597250225,"sku":"OPT-L-PRO-2","price":179.0,"currency_code":"GBP","in_stock":true},{"title":"EOS-C","offer_id":42296622416049,"sku":"OPT-L-PRO-eos-c","price":169.0,"currency_code":"GBP","in_stock":false},{"title":"Full Frame EOS","offer_id":42296622448817,"sku":"OPT-L-PRO-FF-EOS","price":185.0,"currency_code":"GBP","in_stock":true},{"title":"Full Frame Nikon","offer_id":42296622481585,"sku":"OPT-L-PRO-FF-NIKON","price":185.0,"currency_code":"GBP","in_stock":true},{"title":"Full Frame Sony","offer_id":42296622514353,"sku":"OPT-L-PRO-FF-SONY","price":199.0,"currency_code":"GBP","in_stock":true},{"title":"EOS-R","offer_id":42296622547121,"sku":"OPT-L-PRO-EOS-R","price":215.0,"currency_code":"GBP","in_stock":true},{"title":"77mm","offer_id":42296622579889,"sku":"OPT-L-PRO-77","price":199.0,"currency_code":"GBP","in_stock":true},{"title":"82mm","offer_id":42296622612657,"sku":"OPT-L-PRO-82","price":234.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-l-pro-filters-341581.webp?v=1718364481"},{"product_id":"optolong-l-ultimate","title":"Optolong L-Ultimate","description":"\u003ch2 class=\"title page-title\"\u003eOptolong L-Ultimate Light Pollution Dual-Bandpass 3nm Narrowband Imaging Filter - 2\"\u003c\/h2\u003e\n\u003cp\u003eThis listing is for the 2-inch filter.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt's about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae's emissions into H-Alpha (red) and OIII (green-blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. Maximizes the transmission of the main emission lines of the nebula in OIII (496nm and 500nm) and H-alpha (656nm). Used with DSLR, colour\/MONO CMOS and CCD, however, this filter is not suitable for fast ratio systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe advantage of L-Ultimate is that it only passes through the emission lines OIII(500.7nm) and Ha(656.3nm), in which case all other light pollution emission lines are eliminated so that only the emission and reflection signals of the nebula are captured during imaging. Therefore, the sky background of the image is darker, and the contrast between the nebulae and the signal-to-noise ratio are improved to the greatest extent. In heavy light pollution areas, the product can also selectively filter light pollution and clutter signals through the emission lines of nebulae, and finally avoid the impact of light pollution on astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is different from the series of dual-narrowband L-eNhance and L-eXtreme in that L-Ultimate is a dual-3nm bandwidth filter that only passes through Ha and OIII emission lines. You will get a darker sky background, more contrast of the image and the suppression on stars. L-Ultimate has also been optimized in terms of halo performance, so that there is no obvious halo when shooting on a bright star object.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"2\" cellpadding=\"1\" border=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSbustrate\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eoptical glass\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOIII 3nm Ha 3nm\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBlocking range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e300-1000nm\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBlocking\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e\u0026gt;OD4\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSurface quality\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTransmitted Wavefront RMS:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eλ\/4\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e30seconds\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReference Spectrum\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/affa162a0200e85a43f613d6409654fc.png\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20191111\/f778991ef77732079f9b4bfa1f7010d4.png\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20191111\/9be9f501063812f34002518b35d63397.png\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Ultimate Filter Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e►\u003c\/strong\u003e\u003cu\u003e\u003cstrong\u003eNebulosa Laguna M8\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTelescopio: Askar fra600\u003cbr\u003eCamera: Zwo Asi 294 mc pro\u003cbr\u003eMontatura: Skywatcher AZ-EQ5\u003cbr\u003eAutoguida: Zwo mini guide con zwo asi 224mc\u003cbr\u003e\u003cstrong\u003eFiltro Optolong L-Ultimate\u003c\/strong\u003e\u003cbr\u003eSoftware d'acquisizione Sgpro\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCredit: Gianni Lacroce (Italy)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20230626\/5e110a4ddc0ff90f9d83e0abe8c198a4.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e►\u003c\/strong\u003e\u003c\/span\u003e\u003cu\u003e\u003cstrong\u003e\u003cspan\u003eThe Pelican Nebula (also known as IC 5070 and IC 5067)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Pelican Nebula (also known as IC 5070 and IC 5067) is an HII region associated with the North American Nebula in the Swan constellation whose gaseous formations bear a vague resemblance to a pelican, from which it takes its name. The Pelican Nebula is located near the first-magnitude star Deneb, and is separated from its more prominent neighbour, the North American Nebula, by a foreground molecular cloud filled with dark dust. Both are part of the larger HII region of Westerhout 40.\u003cbr\u003eThe Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from the young energetic stars is slowly turning the cold gas into hot gas and gradually advancing an ionisation front outwards. Particularly dense filaments of cold gas can still be seen, and among them are two jets emitted by Herbig-Haro object 555. In millions of years this nebula may no longer be known as the Pelican, as the balance and position of stars and gas will leave something that will look completely different.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKonus 200\/1000 @960mm, f\/4.8\u003cbr\u003eQhyccd Qhy168c @-5 °C\u003cbr\u003eSky-Watcher Eq6r Pro mount\u003cbr\u003e\u003cstrong\u003eOptolong L_Ultimate filter 122x300\"\u003c\/strong\u003e\u003cbr\u003eSvbony UV\/IR-cut filter 114x30\"\u003cbr\u003eN.I.N.A., DSS, APP, PixInsight, PS\u003cbr\u003eFerrara (Italy)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCredit: Massimo Di Fusco (Italy)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20230621\/48a7fe116503c240ca8a5b4957a253cf.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e►\u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e\u003cu\u003eWR 134\u003c\/u\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWR 134 is a variable Wolf-Rayet star located around 6,000 light years away from Earth in the constellation of Cygnus, surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is five times the radius of the sun, but due to a temperature over 63,000 K it is 400,000 times as luminous as the Sun.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWR 134 was one of three stars in Cygnus observed in 1867 to have unusual spectra consisting of intense emission lines rather than the more normal continuum and absorption lines. These were the first members of the class of stars that came to be called Wolf-Rayet stars (WR stars) after Charles Wolf and Georges Rayet who discovered their unusual appearance.\u003cbr\u003eAsi2600mc pro +\u003cstrong\u003e L ultimate\u003c\/strong\u003e\u003cbr\u003eCredit: Cédric Humbert\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20230626\/09211c00b82c3d4786c812cad5755978.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e►\u003c\/strong\u003e\u003c\/span\u003e\u003cu\u003e\u003cspan\u003e\u003cstrong\u003eThor's Lightning and the Angelo’s nebulae (Martino-Sainty Object 1)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eVersion OIII\/RGB\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWe have photographed the LDN 1400 object that hides the SNR G150.3+4.5, aka \"Thor's Lightning.\"\u003cbr\u003eA collaboration on data acquisition allowed us to highlight the SNR signal but also to unveil an OIII shell around the star \"CI Camelopardalis\".\u003cbr\u003eThe StDr team, which supported us on this project, analyzed our data and helped us to register this discovery, allowing us to open the Martino-Sainty Object (MarSai O) catalog.\u003cbr\u003eMarSai O 1 was named the \"Angelo's Nebula\", in homage to my father who has passed away 2 years ago.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- My equipment and exifs:\u003cbr\u003eRGB exifs: 269x300s\u003cbr\u003eAlpha exifs : 83x600s\u003cbr\u003eTakahashi FSQ85-EDX scope and ZWO ASI2400MC camera and \u003cstrong\u003eOptolong L-Ultimate filter \u003c\/strong\u003efor the Hydrogen Alpha signal.\u003cbr\u003eSky-Watcher EQ6-R Pro mount driven by AsiAir Plus\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- Yann 's equipment and exifs :\u003cbr\u003eExifs Oiii : 60x600s\u003cbr\u003eTakahashi FSQ106-EDX4 scope with reducer, and ZWO ASI2600MM camera and Antlia 3Nm 36mm filter\u003cbr\u003eSky-Watcher EQ6-R Pro mount driven via NINA.\u003cbr\u003eTotal integration 46h15\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePre-processing was done with Siril and post-processing with PixInsight and Photoshop.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eImage Credit: Nicola Martino (France)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20230626\/a374dbbc10b86a04d9b5049ca4348bbf.jpg\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20230518\/e31b9d75287e4fbd1a9d4c2f874bab82.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e►\u003cu\u003eThe Cigar Galaxy (also known as M 82 or NGC 3034)\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMessier 82 (also known as NGC 3034, Cigar Galaxy or M82) is a starburst galaxy approximately 12 million light-years away in the constellation Ursa Major. It is the second-largest member of the M81 Group, with the D25 isophotal diameter of 12.52 kiloparsecs (40,800 light-years). It is about five times more luminous than the Milky Way and its central region is about one hundred times more luminous. The starburst activity is thought to have been triggered by interaction with neighbouring galaxy M81. As one of the closest starburst galaxies to Earth, M82 is the prototypical example of this galaxy type. SN 2014J, a type Ia supernova, was discovered in the galaxy on 21 January 2014.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTechnical data: \u003cbr\u003e204*180s G1600 T-20 \u003cbr\u003e34*120s G1600 T-20\u003cbr\u003e79*900s G1600 T-20 \u003cbr\u003eEquipment:Skywatcher 254 F5 @1033mm (F4)\u003cbr\u003eSkywatcer 0.87x Coma Corrector\u003cbr\u003eQHYCCD QHY294c \u003cbr\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/optolong.com\/cms\/document\/detail\/id\/13.html\"\u003eL-Pro Optolong \u003c\/a\u003e\u003c\/strong\u003e\u003cbr\u003eOptolong \u003cstrong\u003e\u003ca href=\"https:\/\/optolong.com\/cms\/document\/detail\/id\/192.html\"\u003eL-Ultimate\u003c\/a\u003e\u003c\/strong\u003e\u003cbr\u003eZWO OAG + ASI290mm Mini Ioptron CEM70 \u003cbr\u003eSoftware: N.I.N.A. + PHD2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eShots by Francesco Roots (Italy)\u003cbr\u003eProcessing by Mirko Tondinelli (Italy)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20230407\/52efe4b2f073abea96ce93d0394bb957.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About colour: due to the influence of ambient light, colour difference of the display and flash photography, the colour of the product may have some colour difference. Detailed colour is in accordance with the final product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About coating: the interference filter will show different colours under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●About the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"2\"","offer_id":42296625135793,"sku":null,"price":289.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-l-ultimate-791493.webp?v=1718364502"},{"product_id":"optolong-lrgb-ccd-set","title":"Optolong LRGB-CCD Set","description":"\u003ch1\u003eOptolong LRGB-CCD Set\u003c\/h1\u003e\n\u003cp\u003eThe Optolong LRGB-CCD Set is designed for maximum contrast and with extremely high gradients for clear differentiation of colours. The LRGB filter set divides the spectrum into its components Red, Green, Blue, and Luminance. OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural colour imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves colour balance and separation.\u003c\/p\u003e\n\u003ch2\u003eOptolong LRGB-CCD Set description\u003c\/h2\u003e\n\u003cp\u003eOptolong LRGB-CCD Set is designed for maximum contrast and with extremely high gradients for clear differentiation of colours. The LRGB filter set divides the spectrum into its components red, green, blue, and luminance.\u003c\/p\u003e\n\u003cp\u003eOIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural colour imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves colour balance and separation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRGB, parfocal: 1:1:1\u003c\/li\u003e\n\u003cli\u003eCreate images in their true original colours showing a wealth of natural detail\u003c\/li\u003e\n\u003cli\u003eSteep bandpass filters to eliminate UV and IR interference\u003c\/li\u003e\n\u003cli\u003eIncludes Luminance (UV\/IR Cut), Red, Green, and Blue filters to reproduce the star's colour\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOptolong LRGB-CCD Set Specification\u003c\/h2\u003e\n\u003ch3\u003e1. Optolong LRGB-CCD Set Introduction\u003c\/h3\u003e\n\u003cp\u003eDesigned for maximum contrast with steep gradients, Optolong LRGB-CCD Set ensure precise differentiation of colours for vibrant astrophotography.\u003c\/p\u003e\n\u003ch3\u003e2. Optolong LRGB-CCD Set Reference Spectrum\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eThis curve is for reference only and not representative of the final product data.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorizontal axis:\u003c\/strong\u003e Wavelength in Nanometers (nm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVertical axis:\u003c\/strong\u003e Transmission in %\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e3. Optolong LRGB-CCD Set Coating Technology\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eIon-assisted deposition technology for durability, scratch resistance, and thermal stability\u003c\/li\u003e\n\u003cli\u003ePrecision coatings for high transmission and optical density of off-band\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e5. Optolong LRGB-CCD Set Packaging\u003c\/h3\u003e\n\u003cp\u003e2019 NEW packaging with improved durability and design.\u003c\/p\u003e\n\u003ch3\u003e6. Optolong LRGB-CCD Set Performance\u003c\/h3\u003e\n\u003ch4\u003eI. M51\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTelescope: GSO 10\" RC\u003c\/li\u003e\n\u003cli\u003eCamera: QHYCCD QHY 695A\u003c\/li\u003e\n\u003cli\u003eMount: SkyWatcher AZ EQ6 GT\u003c\/li\u003e\n\u003cli\u003eExposure: 100x300\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eII. Globular Cluster M5\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTelescope: Sky-Watcher Esprit 150 f\/7 refractor\u003c\/li\u003e\n\u003cli\u003eCamera: QHY 16200-A\u003c\/li\u003e\n\u003cli\u003eExposure: 8hr 42m\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eIII. van den Bergh 152 and Barnard 175\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTelescope: Sky-Watcher Esprit 150 f\/7 refractor\u003c\/li\u003e\n\u003cli\u003eCamera: QHY 16200-A\u003c\/li\u003e\n\u003cli\u003eExposure: 11hr 10m\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOptolong LRGB-CCD Set Warm Prompts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout colour:\u003c\/strong\u003e Product colours may vary due to ambient light or display differences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout coating:\u003c\/strong\u003e Different lighting conditions may affect the visible coating colours, which is normal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout style:\u003c\/strong\u003e Product design and parameters are subject to updates and improvements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e\n\u003cspan\u003e\u003cstrong\u003e2. \u003c\/strong\u003e\u003c\/span\u003e\u003cb\u003eOptolong LRGB-CCD Set \u003c\/b\u003e\u003cstrong style=\"color: inherit; letter-spacing: initial;\"\u003eReference Spectrum\u003c\/strong\u003e\n\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20210508\/27fe738c2ce6a5a69e998d648cc17b60.png\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOptolong LRGB-CCD Set\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers (nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The WHITE line shows the transmission of the L-CCD filter. R-CCD filter line is shown in RED. G-CCD filter line is shown in GREEN. And the B-CCD link is shown in BLUE.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOptolong LRGB-CCD Set\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e3. \u003c\/strong\u003e\u003c\/span\u003e\u003cb\u003eOptolong LRGB-CCD Set \u003c\/b\u003e\u003cstrong style=\"font-size: 1em; font-family: var(--p-font-family-sans); letter-spacing: initial;\"\u003eCoating Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong LRGB-CCD Set adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20200716\/22c5068a8f4783079f93c42761aa9238.png\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/f778991ef77732079f9b4bfa1f7010d4.png\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/9be9f501063812f34002518b35d63397.png\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOptolong LRGB-CCD Set \u003c\/b\u003e\u003cspan\u003e\u003cstrong\u003e2019 NEW package\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/3560d00b15da118371c12766c074710d.png\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/497e351dc95fe824244ce6bf6135cbd0.png\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e \u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003e6. Optolong LRGB-CCD Set Performance\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eⅠ. \u003cu\u003eM51 © 李召麒\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTechnic Data:\u003cbr\u003eTelescope: GSO 10\" RC\u003cbr\u003eCamera: QHYCCD QHY 695A\u003cbr\u003eMount: SkyWatcher AZ EQ6 GT\u003cbr\u003eProcessing: Adobe Photoshop CC, PixInsight 1.8.8\u003cbr\u003eFilters: Optolong B, Optolong G, Optolong R, Optolong L\u003cbr\u003eDate: 2020年1月2日\u003cbr\u003eExposure: 100x300\"\u003cbr\u003eCopyright@李召麒\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20200728\/54d33c88ae9700bfef9eb65792de90a5.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eⅡ. \u003cu\u003eGlobular Cluster M5© Astrodoc Ron Brecher   \u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGlobular cluster M5 contains hundreds of thousands of stars and is one of my favourite objects to view in any scope. Bright globular clusters remind me of sugar spilled on a black table cloth.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOptolong LRGB-CCD Set\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSky-Watcher Esprit 150 f\/7 refractor, \u003c\/span\u003e\u003ca href=\"https:\/\/www.qhyccd.com\/index.php?m=content\u0026amp;c=index\u0026amp;a=show\u0026amp;catid=95\u0026amp;id=17\"\u003e\u003cspan\u003eQHY 16200-A\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e camera, \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003ca href=\"https:\/\/www.optolong.com\/en\/\"\u003e\u003cspan\u003eOptolong\u003c\/span\u003e\u003c\/a\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003cspan\u003e\u003cstrong\u003e\u003cu\u003e L, R, G and B filters\u003c\/u\u003e\u003c\/strong\u003e, Paramount MX, unguided.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAcquisition, and focusing with TheSky X. Automation with CCD Commander.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEquipment control with PrimaLuce Labs Eagle 3 Pro computer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll pre-processing and processing in \u003c\/span\u003e\u003ca href=\"https:\/\/pixinsight.com\/\"\u003e\u003cspan\u003ePixInsight\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e. Acquired from my \u003c\/span\u003e\u003ca href=\"http:\/\/www.skyshed.com\/main.html\"\u003e\u003cspan\u003eSkyShed\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e in Guelph.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNo Moon, average to above average transparency and average seeing. Data acquired May 25 – June 4, 2019.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e23x10m L, 19x3m L, 16x5m R, 16x5m G and 15x5m B (Total = 8hr42m)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eImage scale 1.15 arcsec per pixel\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/astrodoc.ca\/m5\/\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20201221\/31a7ccf036f6e4c1e109e9cba7068306.jpg\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/astrodoc.ca\/m5\/\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20200728\/833956eefaa657a243f9b5bf1b65590f.jpg\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIII. \u003cu\u003evan den Bergh 152 and Barnard 175 © Astrodoc Ron Brecher\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003evan den Bergh 152 (vdB 152; a.k.a. Cederblad 201) is the prominent blue reflection nebula on the right side of this image. It lies at the end of Barnard 175, the pillar of dust filling this field. The dark area connected to vdB is a Bok globule, a dense accumulation of cosmic dust from which stars are often born. The whole complex lies in the direction of the constellation Cepheus, about 1400 light years away and spanning 7 light years. Interestingly, the bright star illuminating vdB 152 was likely not born within this complex as it is moving through space at a different speed than the nebula. \u003c\/p\u003e\n\u003cp\u003eTekkies:\u003c\/p\u003e\n\u003cp\u003eSky-Watcher Esprit 150 f\/7 refractor, and QHY 16200-A camera with Optolong LRGB filters. Acquisition, focusing, and control of Paramount MX mount, unguided, with TheSkyX. Focus with Optec DirectSync motor and controller. Automation with CCDCommander. Equipment control with PrimaLuce Labs Eagle 3 Pro computer. All pre-processing and processing in PixInsight. Acquired from my SkyShed in Guelph. Average or better transparency and seeing. Data acquired June 25-July 1, 2020 in a moderately moonlit sky.\u003c\/p\u003e\n\u003cp\u003e90x5m L, 36x5m R, and 22x5m G and B (Total = 11hr10m)\u003cbr\u003eImage scale 1.15 arcsec per pixel\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/astrodoc.ca\/vdb-152\/?fbclid=IwAR017IZ9LzAFuM6TYhTOYBzb7WUGLZHWFMxw2skkLtVkVVu5K2Ok476TCgc\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20201221\/92fcf334aa027a152979955a624214a8.jpg\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e●About colour: due to the influence of ambient light, colour difference of the display and flash photography, the colour of the product may have some colour difference. Detailed colour is in accordance with the final product.\u003c\/p\u003e\n\u003cp\u003e●About coating: the interference filter will show different colours under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/p\u003e\n\u003cp\u003e●About the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/p\u003e\n\u003cp\u003e●About the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":42296637653169,"sku":null,"price":107.0,"currency_code":"GBP","in_stock":true},{"title":"2\"","offer_id":42296632311985,"sku":null,"price":147.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-lrgb-ccd-set-982075.webp?v=1718364493"},{"product_id":"optolong-oiii-3nm-filter","title":"Optolong OIII 3nm Filter","description":"\u003ch1\u003eOptolong OIII 3nm Ultra Narrow Band Deep Sky Imaging Filter for CCD\/CMOS Astro Photography\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eHere below you will find a description of all three types of filters for your information as a full bundle is also available, however \u003c\/span\u003e\u003cb\u003e\u003cspan\u003ethis product listing is only for the Optolong 3nm OIII filter. \u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease note, if you buy the full HSO bundle you will save some money in comparison to the price of the individual items.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eGeneral Product Description for All Versions\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Optolong SHO-3nm filter kit (available separately) includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExtra narrowband SIICCD3nm filter  (Sulphur II for CCD) is designed for nebula observation allowing 3nm bandwidth of light  centred on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eH-Alpha 3nm filter is the popular narrowband filter allowing 3nm bandwidth of light centred on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure vapor lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.sky glow). Better choice of narrowband H-Alpha astro photographer filter for highest contrast and revealing subtle nebula details. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eMain Use and Performance of the OIII Filter (this product listing)\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis ultra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centred on a wavelength of 500nm through, which corresponds to OIII emission line, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green coloured filter. Many of images of planetary nebula and supernova remnants are taken only with H-Alpha and OIIII filters. They show great structural details, but have natural colours, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eGive you higher contrast and greater detailed viewing;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDecrease background noise and improve the contrast of the object;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIncrease the faint nebula signal and make it brighter;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith a narrow band filters kit you are able to process a Hubble-like image (Hubble-palette);\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThrough the optimization of the substrate and upgraded coating technology.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptolong filters are not designed for solar observation. DO NOT LOOK AT THE SUN WITH ANY OPTOLONG FILTER as permanent eye damage will be the result.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Data\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate material\u003c\/li\u003e\n\u003cli\u003eGlass thickness  of 2\" version: 1.85mm;\u003c\/li\u003e\n\u003cli\u003eGlass thickness of 36mm version: 2.0mm\u003c\/li\u003e\n\u003cli\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wave front and \u0026lt; 30 seconds parallelism over both surfaces\u003c\/li\u003e\n\u003cli\u003e85-86% transmission at major OIII line at 500nm\u003c\/li\u003e\n\u003cli\u003eLight pollution emission is blocked \u0026gt;99.9%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFilter Cell (only for filters in a cell)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-thin filter cell minimise vignetting by maximising possible clear aperture (clear aperture is 26mm for 1.25” size and 45mm for 2” size)\u003c\/li\u003e\n\u003cli\u003eAero metal Material\u003c\/li\u003e\n\u003cli\u003ePrecise CNC Machining\u003c\/li\u003e\n\u003cli\u003eSand Blasting Process\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eExtinction Treatment to Prevent Reflection\u003c\/li\u003e\n\u003cli\u003eLaser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAvailable Sizes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStandard 2”\u003c\/li\u003e\n\u003cli\u003eRound 36mm Unmounted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackaging\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePlastic PP Case\u003c\/li\u003e\n\u003cli\u003eImported High Pressure EVA Case Lining\u003c\/li\u003e\n\u003cli\u003eSilver Cardboard Box\u003c\/li\u003e\n\u003cli\u003eHigh Density Sponge Carton Lining\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOptical Coating\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band. (Please note, \"planetary rotation system\" is a type of optical coating process and does not refer to the astronomical system describing the motion of the planets in our solar system.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Major Emission Lines of Nebulae: H-α 656.3nm, H-β486.1nm, OIII 495.9nm, OIII 500.7nm \u003cbr\u003eThe Major Emission Lines of Artificial Light Pollution: Hg 435.8nm, 546.1nm, 577nm, 578.1nm, Na 598nm, 589.6nm, 615.4nm, 616.1nm\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e\u003cspan\u003e\u003cstrong\u003eOptolong SHO-3nm Narrowband Filters Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAs we all know, OIII narrow band filters always had a problem with halos around bright stars. Thanks to Optolongs long standing experiences with their 7nm narrow band filters, the halo of OIII 3nm filter was optimized by improving the coating technology. Here we also conducted a qualitative halo test of the bright star of the Veil Nebula, and it can be seen from the original picture that the OIII 3nm performs very well on the bright star.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTelescope：RASA 11 at f2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCamera：QHY 600\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMount:艾顿 IOptron CEM120\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong OIII-3nm single 10min\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003erights: \u003c\/span\u003e\u003cspan\u003eWuzhen\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eI. \u003cu\u003eThe Bubble Nebula (NGC 7635)  © \u003ca href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eAstrodoc Ron Brecher \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAcquisition, focusing, and control of Paramount MX mount with N.I.N.A., TheSkyX and PHD2. Focus with Optec DirectSync motor and controller. Equipment control with PrimaLuce Labs Eagle 4 Pro computer. All pre-processing and processing in PixInsight. Acquired from Ron‘s \u003ca href=\"https:\/\/skyshed.com\/\"\u003eSkyShed\u003c\/a\u003e in Guelph. Average transparency and seeing. Data acquired Oct 18-19, 2021 under a brightly moonlit sky (Moon 12 days old)..\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSky-Watcher Esprit 150 f\/7 refractor and QHY600M camera with Optolong H-alpha, O(III) and S(II) 3nm filters – FIRST LIGHT WITH OPTOLONG 3nm BANDPASS FILTERS\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHa: 9 x 20m = 3hr00m\u003cbr\u003eO3: 10 x 20m = 3hr20m\u003cbr\u003eS2: 9 x 20m = 3hr00m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTotal: 9hr20m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eImage scale 0.72 arcsec per \u003c\/span\u003e\u003cspan\u003epixel \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eⅡ.\u003cu\u003e Pacman Nebula NGC 281 in the Hubble Palette  © \u003ca href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eLuca Fornaciari Astrophotography  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePacman Nebula NGC 281 in the Hubble Palette\u003cbr\u003eWith the bad weather persisting I have taken these last few weeks to experiment with new way in the development of narrowband shots.\u003cbr\u003eI'm happy because I'm defining a Hubble Palette that really feels mine, designing it a little at a time.\u003cbr\u003eNarrowband is creative and fun because it allows us a good deal of freedom to experiment with the integration of the individual channels and the image you see is a developing version of what I am building.\u003cbr\u003eThe image was obtained with the new 3nm Optolong filters. If the bad weather will allow me a few nights I will soon finish my tests on these filters, but for now the impressions are really good.\u003cbr\u003e240 minutes of Ha, 510 of OIII and 260 minutes of SII with the ASI 294MM and the Sky-Watcher 300 f\/4.\u003cbr\u003eI wish you a beautiful sunny day!\u003cbr\u003eSETUP:\u003cbr\u003eSky-Watcher 300 f \/ 4 on EQ8R-Pro\u003cbr\u003eZWO ASI 294MM, \u003cstrong\u003eOptolong Filters Ha 3nm, OIII 3nm, SII \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\"\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"2\"","offer_id":42296646140081,"sku":"73722","price":388.8,"currency_code":"GBP","in_stock":true},{"title":"36mm Glass Only","offer_id":42296651153585,"sku":null,"price":329.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-oiii-3nm-filter-411896.webp?v=1718364486"}],"url":"https:\/\/www.darkclearskies.co.uk\/collections\/featured-optolong-equipment.oembed","provider":"Dark Clear Skies ","version":"1.0","type":"link"}