{"title":"Baader Planetary \u0026 Moon Filters","description":"\u003cp\u003eBaader Planetarium planetary and Moon filters improve contrast and reduce glare when observing or imaging bright Solar System targets. The Contrast-Booster reduces false colour in achromatic refractors, and the Moon \u0026amp; Skyglow filter tames lunar brightness while boosting contrast.\u003c\/p\u003e\u003cp\u003eFor specialized work, the U-Venus filter (350nm) reveals cloud structure on Venus and the Methane filter (889nm) shows Jupiter and Saturn in methane absorption. Individual colour filters and a 6-colour set are also available.\u003c\/p\u003e","products":[{"product_id":"baader-methane-filter-889nm-8nm-1-25","title":"Baader Methane Filter 889nm - 8nm 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e889nm Center Wavelength\u003c\/li\u003e\n\u003cli\u003e8nm Bandwidth (FWHM)\u003c\/li\u003e\n\u003cli\u003eTargets Methane Absorption Band\u003c\/li\u003e\n\u003cli\u003eHigh-Contrast Planetary Imaging\u003c\/li\u003e\n\u003cli\u003e1.25\" Filter Format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eBaader Methane Filter 889nm - 8nm 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Baader Methane Filter isolates a narrow 8nm bandpass centered at 889nm, a specific near-infrared wavelength designed for 1.25\" filter wheels to reveal high-altitude structures in the methane-rich atmospheres of Jupiter and Saturn. This filter transforms your view of gas giants from a simple color image into a scientific tool, creating high-contrast monochrome data that highlights features invisible in the visible spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePlanetary Science: Imaging Jupiter and Saturn in the 889nm Methane Band\u003c\/h3\u003e\n\u003cp\u003eThe 889nm wavelength is significant because it corresponds to a strong methane absorption band. When you image a gas giant through this filter, the deep atmospheric layers rich in methane gas absorb this light and appear dark. Conversely, high-altitude clouds, storms, and hazes that sit above the main methane layer reflect sunlight and appear brilliantly bright, creating a stark, high-contrast image.\u003c\/p\u003e\n\u003cp\u003eOn Jupiter, this effect makes the Equatorial Zone and the Great Red Spot (GRS) stand out with dramatic clarity. For Saturn, you can capture details in its banded structure and detect seasonal polar storms that are otherwise washed out by the planet's muted visible-light appearance. This is not just a different view; it's a method for mapping the vertical structure of a planet's atmosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Technique: The Demands of an 8nm Near-Infrared Bandpass\u003c\/h3\u003e\n\u003cp\u003eUsing the Baader Methane Filter requires a specific approach. Because it isolates a tight 8nm bandpass in the near-infrared—where silicon sensors are less sensitive—you will need longer exposure times or higher gain settings than with a standard luminance or IR-pass filter. This makes the filter best suited for telescopes with larger apertures that can gather sufficient light.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonochrome Camera Required:\u003c\/strong\u003e This is a scientific filter designed for use with a monochrome astronomy camera to capture a detailed luminance layer. A color camera's Bayer matrix would block most of the incoming light and produce a very weak, unusable signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeeing is Critical:\u003c\/strong\u003e The longer required exposures make this filter sensitive to atmospheric turbulence. For the best results, you should use it on nights of good to excellent seeing to resolve the fine details it's capable of revealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eData Integration:\u003c\/strong\u003e The methane-band image is typically captured as a separate channel and can be colorized with RGB data to create a final composite that shows both the scientific detail from the 889nm band and the natural color of the planet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Baader Methane Filter make Jupiter's Great Red Spot appear?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eJupiter's Great Red Spot (GRS) is a high-altitude storm system. Because it sits above much of the planet's atmospheric methane, it will reflect sunlight at 889nm and appear very bright through the \u003cstrong\u003eBaader Methane Filter\u003c\/strong\u003e, standing out in high contrast against the darker, methane-absorbing cloud belts surrounding it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader Methane Filter with a color camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is not recommended for color cameras. The \u003cstrong\u003eBaader Methane Filter\u003c\/strong\u003e isolates a very narrow 8nm band of near-infrared light at 889nm. A color camera's Bayer matrix would block approximately 75% of this already-dim signal, resulting in extremely low efficiency and poor image quality. A monochrome camera is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Baader Methane Filter centered on the 889nm wavelength?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 889nm wavelength corresponds to a strong absorption line for methane gas. By imaging specifically at this wavelength, the \u003cstrong\u003eBaader Methane Filter\u003c\/strong\u003e allows astronomers to differentiate between deep, methane-rich atmospheric layers (which appear dark) and high-altitude features like clouds and storms (which appear bright).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope works best with the Baader Methane Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBecause the filter has a narrow 8nm bandpass in the near-IR, it passes a limited amount of light. For this reason, the \u003cstrong\u003eBaader Methane Filter\u003c\/strong\u003e performs best with larger aperture telescopes (typically 8\" or more) that have greater light-gathering power. This helps to keep exposure times manageable and achieve a better signal-to-noise ratio.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the narrow 8nm bandpass on the Baader Methane Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe narrow 8nm bandpass ensures that only light from the specific methane absorption band is recorded. This precision increases contrast by rejecting adjacent infrared wavelengths, darkening the methane-rich areas more effectively and making the high-altitude features stand out more sharply.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader Methane Filter help with imaging Mars or the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is highly specialized for the methane-rich atmospheres of gas giants like Jupiter and Saturn. Mars has a very thin atmosphere with negligible methane, and the Moon has no atmosphere at all. Using the \u003cstrong\u003eBaader Methane Filter\u003c\/strong\u003e on these targets would only produce a very dim, low-contrast infrared image with no scientific benefit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter Wavelength\u003c\/td\u003e\n\u003ctd\u003e889nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e8nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Application\u003c\/td\u003e\n\u003ctd\u003ePlanetary Imaging (Gas Giants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter shape\u003c\/td\u003e\n\u003ctd\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eCCD, Planetary, Specialty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003eMethan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003edielectrically coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Methane Filter 889nm - 8nm 1.25\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Cleaning_and_Maintenance_of_Optics_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Cleaning and Maintenance of Optics Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967357776157,"sku":"BAA-2458295","price":348.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Methane-Filter-889nm-8nm-1-25-inch-1__14885.1597110939.1280.1280.jpg?v=1684341026"},{"product_id":"baader-contrast-booster-filter","title":"Baader Contrast-Booster Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnhances contrast for lunar and planetary observing\u003c\/li\u003e\n\u003cli\u003eSignificantly darkens skyglow background\u003c\/li\u003e\n\u003cli\u003eReveals subtle details in Jupiter's cloud belts and Mars's polar caps\u003c\/li\u003e\n\u003cli\u003eAvailable in standard 1.25\" and 2\" mounted formats\u003c\/li\u003e\n\u003cli\u003eThreads directly into standard eyepieces and accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eBaader Contrast-Booster Filter\u003c\/h2\u003e\n\u003cp\u003eThe Baader Contrast-Booster Filter, available in both 1.25\" and 2\" formats, is an essential tool for cutting through skyglow to reveal sharp, high-contrast details on the Moon and planets. By selectively filtering out wavelengths associated with common streetlights while passing critical light from celestial targets, this filter makes features like Jupiter's Great Red Spot, Martian surface markings, and subtle lunar rilles distinctly more visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1.25\" \u0026amp; 2\" Filters for Enhanced Lunar and Planetary Contrast\u003c\/h3\u003e\n\u003cp\u003eThe core function of the Contrast-Booster is to increase the signal-to-noise ratio for bright objects against a brightened sky background. It aggressively blocks the yellow-orange glow from sodium and mercury-vapor streetlights, effectively darkening the space around your target. This allows the subtle colors and structures on planetary surfaces and the Moon to stand out dramatically.\u003c\/p\u003e\n\u003cp\u003eFor refractors, this filter serves a dual purpose by also cutting unfocused violet and blue light, which tightens star images and reduces chromatic aberration. The result is a cleaner, sharper view, particularly on challenging targets like the cloud bands of Jupiter and Saturn, where low-contrast details are easily lost to atmospheric scatter and optical imperfections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast-Booster vs. Standard Moon \u0026amp; Skyglow Filter: A Targeted Approach\u003c\/h3\u003e\n\u003cp\u003eWhile a generic Moon \u0026amp; Skyglow filter offers a mild reduction in light pollution with minimal color shift, the Baader Contrast-Booster is a more specialized instrument. Its transmission properties are more targeted, creating a more significant contrast enhancement at the cost of a more noticeable color cast in the image.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader Contrast-Booster:\u003c\/strong\u003e Ideal for pulling specific, faint details out of the glare on bright planets and the Moon. It excels at separating the zones and belts on Jupiter and defining the polar caps on Mars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Moon \u0026amp; Skyglow:\u003c\/strong\u003e A better choice for general-purpose, wide-field viewing where a more natural color balance is desired and the primary goal is simply to dim the sky background slightly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe trade-off is clear: for maximum detail on specific solar system targets, the Contrast-Booster's targeted filtering is superior. For casual, broad-field sweeping, a milder filter may be preferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Baader Contrast-Booster Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader Contrast-Booster is designed to increase the visual contrast of lunar and planetary details. It achieves this by filtering out specific wavelengths of light associated with skyglow from artificial lighting, which darkens the background sky and makes faint features on bright objects easier to see.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader Contrast-Booster improve views of Jupiter in an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an 8\" SCT, the Baader Contrast-Booster will make Jupiter's atmospheric features significantly more distinct. It helps to separate the faint orange and brown hues of the cloud belts from the whiter zones. The Great Red Spot (GRS) becomes more clearly defined, and smaller ovals and festoons within the cloud structures are often revealed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader Contrast-Booster Filter for deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it can help darken the sky background, the Contrast-Booster is not a nebula filter. It is not optimized for the critical O-III and H-beta emission lines that define most nebulae. For targets like the Orion Nebula (M42) or Dumbbell Nebula (M27), a dedicated UHC or O-III filter will deliver far better results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader Contrast-Booster Filter help with observing Mars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Contrast-Booster is highly effective for Mars. It helps to define the boundaries of the dark albedo features like Syrtis Major against the bright ochre deserts. It is particularly useful for making the white polar caps stand out sharply against the planet's limb.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Baader Contrast-Booster Filter introduce a strong color cast?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, a noticeable color cast is a characteristic of this filter. Because it selectively removes portions of the visual spectrum, the resulting image will have a distinct bluish or greenish tint. This is a normal trade-off for the significant gain in contrast on planetary features.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this filter thread directly onto my 1.25\" and 2\" eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Baader Contrast-Booster filters are mounted in standard cells with standard filter threads. The \u003cstrong\u003e1.25\" version\u003c\/strong\u003e has M28.5 x 0.6 threads, and the \u003cstrong\u003e2\" version\u003c\/strong\u003e has M48 x 0.75 threads, allowing them to screw directly into the barrels of most eyepieces, diagonals, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" Round Mounted, 2\" Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eContrast Enhancement, Color Correction, IR-Cut, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" Round Mounted","offer_id":44967360135453,"sku":"BAA-2458360","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":44967360168221,"sku":"BAA-2458365","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Contrast-Booster-Filter-1__53178.1597110973.1280.1280.jpg?v=1684341355"},{"product_id":"baader-individual-color-filter-dark-blue-bright-blue-green-yellow-red-orange","title":"Baader Individual Color Filter - Dark Blue, Bright Blue, Green, Yellow, Red, Orange","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAvailable in 6 distinct colors for targeted planetary observation\u003c\/li\u003e\n\u003cli\u003ePlaneoptically polished to 30 arcseconds for zero image degradation\u003c\/li\u003e\n\u003cli\u003e7-layer anti-reflection coatings reduce reflections to less than 0.25%\u003c\/li\u003e\n\u003cli\u003eNon-ageing sealed coating edges for lifetime durability\u003c\/li\u003e\n\u003cli\u003eOffered in standard 1.25\" and 2\" mounted sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eBaader Individual Color Filters\u003c\/h2\u003e\n\u003cp\u003eThe Baader Individual Color Filters redefine planetary viewing with an advanced 7-layer anti-reflection coating that reduces reflections to just 0.25% per surface for maximum contrast and light throughput. Each filter is planeoptically polished to a precision of 30 arcseconds, ensuring that no optical degradation occurs even at the highest magnifications. With options like the 470nm Light Blue for enhancing Jupiter's Great Red Spot or the 610nm Red for resolving Martian surface details, this series provides scientifically-targeted contrast enhancement far beyond simple colored glass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Baader Optical Standard: 0.25% Reflection and 30 Arcsecond Polish\u003c\/h3\u003e\n\u003cp\u003eUnlike standard color filters which are often just dyed glass, every Baader filter is built on a substrate that is planeoptically polished to a 30 arcsecond tolerance. This prevents the introduction of astigmatism or other aberrations into your light path, preserving the sharpness delivered by your telescope. The surfaces then receive a 7-layer dielectric coating, which creates the filter's precise bandpass while suppressing reflections to under 0.25%.\u003c\/p\u003e\n\u003cp\u003eThe result is a view with significantly higher contrast, free from the ghosting and scattered light that plagues lesser filters. To ensure a lifetime of use, Baader seals the coating edges, making them non-ageing and resistant to moisture intrusion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e6 Colors for Planetary Contrast: From Venus to Mars\u003c\/h3\u003e\n\u003cp\u003eEach filter in the series is designed to isolate specific wavelengths of light, enhancing the visibility of subtle features on planetary surfaces and in their atmospheres. Choosing the right color is key to revealing details that are otherwise invisible.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDark Blue (435nm Bandpass):\u003c\/strong\u003e Ideal for observing the atmospheric structures of Venus and enhancing detail in comet tails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Blue (470nm Bandpass):\u003c\/strong\u003e A superb all-around filter for Jupiter, it darkens reddish structures like the Great Red Spot and enhances contrast in the cloud belts. It also helps visualize high clouds on Mars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreen (500nm Bandpass):\u003c\/strong\u003e Excellent for viewing Martian ice caps and dust storms. On Jupiter and Saturn, it boosts contrast in the cloud belts and zones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYellow (495nm Longpass):\u003c\/strong\u003e Enhances red and orange features on Jupiter and Saturn and improves detail in the Martian maria.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrange (570nm Longpass):\u003c\/strong\u003e A strong performer for Mars, it penetrates hazes and sharpens boundaries of surface features. Also darkens the belts of Jupiter and Saturn.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed (610nm Longpass):\u003c\/strong\u003e Offers the highest contrast for Martian surface features like Syrtis Major, especially during moments of good seeing. Effectively cuts through blue atmospheric haze.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBandpass vs. Longpass: Understanding Your Filter Choice\u003c\/h3\u003e\n\u003cp\u003eThis series includes two types of filters: bandpass and longpass. The Blue and Green filters are bandpass, meaning they transmit a very specific, narrow range of wavelengths. This provides a more targeted, higher-contrast view of specific phenomena but results in a slightly dimmer overall image.\u003c\/p\u003e\n\u003cp\u003eThe Yellow, Orange, and Red filters are longpass, blocking shorter wavelengths and transmitting everything above their rated cutoff (e.g., the 610nm Red filter passes all light with a wavelength longer than 610nm). This produces a brighter, more natural-looking image and is excellent for improving general contrast and cutting through unsteady atmospheric seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBeyond Simple Color Glass: Why Baader's 7-Layer Coatings Matter\u003c\/h3\u003e\n\u003cp\u003eMany planetary filters on the market are made from \"colored-in-the-mass\" glass, where the color is part of the glass itself. This method can lead to lower light transmission and potential image degradation if the glass is not optically flat. Baader's approach is fundamentally different and superior.\u003c\/p\u003e\n\u003cp\u003eBy starting with a perfectly flat, clear substrate polished to 30 arcseconds and applying hard, multi-layer dielectric coatings, Baader achieves the desired color transmission without scattering light or distorting the wavefront. This meticulous process is why Baader filters can be used at high magnification for imaging and visual work without compromising the optical integrity of your system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich Baader color filter is best for observing Jupiter's Great Red Spot with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eBaader Light Blue (470nm) filter\u003c\/strong\u003e is an excellent choice. It significantly enhances the contrast of reddish features against the lighter cloud zones, making the Great Red Spot and other smaller ovals stand out more clearly. The Green (500nm) filter is also a great alternative for general cloud belt detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader Red (610nm) filter to see more detail on Mars with my 120mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The \u003cstrong\u003eBaader Red (610nm) longpass filter\u003c\/strong\u003e is one of the best for Martian observation. It provides maximum contrast for dark surface features (albedo markings) like Syrtis Major and helps define the edges of the polar ice caps. It is most effective when the atmospheric seeing is stable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the Baader Light Blue (470nm) and Dark Blue (435nm) filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eLight Blue (470nm)\u003c\/strong\u003e is a general-purpose filter for enhancing red features on Jupiter and high-altitude clouds on Mars. The \u003cstrong\u003eDark Blue (435nm)\u003c\/strong\u003e has a narrower and shorter wavelength bandpass, making it more specialized for observing the subtle atmospheric details of Venus and the structure of comet tails.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy are Baader color filters more expensive than other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe cost reflects the superior manufacturing process. Unlike simple dyed glass, Baader filters use an optically flat substrate, polished to a 30 arcsecond precision, and apply a 7-layer dielectric coating. This ensures maximum light transmission, eliminates reflections, and guarantees that the filter will not degrade the image quality of your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre these Baader filters threaded for both the eyepiece barrel and a camera nosepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Both the 1.25\" and 2\" Baader filters feature standard male and female threads. You can thread them directly onto most eyepieces, camera nosepieces, filter wheels, and other accessories of the corresponding size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"planeoptically polished\" mean for a Baader color filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\"Planeoptically polished\" means the glass substrate of the filter is polished to be perfectly flat, to a precision of 30 arcseconds. This is a crucial step that prevents the filter itself from distorting the light passing through it, ensuring that the image remains as sharp at high magnification with the filter as it is without it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Polish\u003c\/td\u003e\n\u003ctd\u003ePlaneoptically polished to 30 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003e7-layer Anti-Reflection (AR) on both sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidual Reflection\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.25% per surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEdge Treatment\u003c\/td\u003e\n\u003ctd\u003eNon-ageing sealed coating edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eOptically polished glass with dielectric coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDark Blue Filter\u003c\/td\u003e\n\u003ctd\u003e435nm Bandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Blue Filter\u003c\/td\u003e\n\u003ctd\u003e470nm Bandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreen Filter\u003c\/td\u003e\n\u003ctd\u003e500nm Bandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYellow Filter\u003c\/td\u003e\n\u003ctd\u003e495nm Longpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrange Filter\u003c\/td\u003e\n\u003ctd\u003e570nm Longpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRed Filter\u003c\/td\u003e\n\u003ctd\u003e610nm Longpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01 (1.25\" Round Mounted \/ Bright Blue, 2\" Round Mounted \/ Bright Blue, 1.25\" Round Mounted \/ Dark Blue, 2\" Round Mounted \/ Dark Blue, 1.25\" Round Mounted \/ Green, 2\" Round Mounted \/ Green, 2\" Round Mounted \/ Orange, 1.25\" Round Mounted \/ Red, 2\" Round Mounted \/ Red, 1.25\" Round Mounted \/ Yellow, 2\" Round Mounted \/ Yellow)\u003cbr\u003e0.06 (1.25\" Round Mounted \/ Orange)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eColor, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eBandpass (1.25\" Round Mounted \/ Bright Blue, 2\" Round Mounted \/ Bright Blue, 1.25\" Round Mounted \/ Dark Blue, 2\" Round Mounted \/ Dark Blue, 1.25\" Round Mounted \/ Green, 2\" Round Mounted \/ Green)\u003cbr\u003eLongpass (1.25\" Round Mounted \/ Orange, 2\" Round Mounted \/ Orange, 1.25\" Round Mounted \/ Red, 2\" Round Mounted \/ Red, 1.25\" Round Mounted \/ Yellow, 2\" Round Mounted \/ Yellow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Individual Color Filter (Selected color and size)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Cleaning_and_Maintenance_of_Optics_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Cleaning and Maintenance of Optics Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Color_Filters_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Color Filters Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" Round Mounted \/ Bright Blue","offer_id":44967360561437,"sku":"BAA-2458303","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Bright Blue","offer_id":44967360594205,"sku":"BAA-2458313","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Dark Blue","offer_id":44967360626973,"sku":"BAA-2458302","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Dark Blue","offer_id":44967360659741,"sku":"BAA-2458312","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Green","offer_id":44967360692509,"sku":"BAA-2458304","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Green","offer_id":44967360725277,"sku":"BAA-2458314","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Orange","offer_id":44967360758045,"sku":"BAA-2458306","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Orange","offer_id":44967360790813,"sku":"BAA-2458316","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Red","offer_id":44967360823581,"sku":"BAA-2458307","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Red","offer_id":44967360856349,"sku":"BAA-2458317","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Yellow","offer_id":44967360889117,"sku":"BAA-2458301","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Yellow","offer_id":44967360921885,"sku":"BAA-2458311","price":110.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Individual-Color-Filters-1__91240.1597110976.1280.1280.jpg?v=1684341060"},{"product_id":"baader-color-filter-set-6-colors","title":"Baader Color Filter Set - 6 Colors","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSet of 6 essential color filters for lunar and planetary observing\u003c\/li\u003e\n\u003cli\u003ePlaneoptically polished to maintain image sharpness at high magnification\u003c\/li\u003e\n\u003cli\u003eDouble 7-layer Phantom Group anti-reflection coatings\u003c\/li\u003e\n\u003cli\u003eReduces residual reflections to just 0.25% per surface\u003c\/li\u003e\n\u003cli\u003eLargest possible clear aperture eliminates vignetting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eBaader Color Filter Set - 6 Colors\u003c\/h2\u003e\n\u003cp\u003eThe Baader Color Filter Set provides 6 essential, planeoptically polished filters for critical lunar and planetary observation. Each filter in the set is treated with a double 7-layer Phantom Group anti-reflection coating that holds residual reflections to just 0.25% per surface, ensuring maximum contrast and light throughput without ghosting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 6-Filter Set: A Complete Planetary Contrast Toolkit\u003c\/h3\u003e\n\u003cp\u003eThis set of 6 filters provides the core colors needed to enhance specific features on the Moon and planets. Rather than buying filters individually, this comprehensive kit equips you with the right tool to increase contrast on Jupiter's cloud belts, Martian polar caps, or subtle lunar rilles, allowing you to adapt to changing seeing conditions and targets throughout an observing session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePhantom Group Coatings: 7 Layers for 0.25% Residual Reflection\u003c\/h3\u003e\n\u003cp\u003eUnlike standard filters that can introduce reflections and dim the image, every Baader color filter is coated with a double 7-layer anti-reflection coating. This advanced \"Phantom Group\" coating reduces unwanted reflections to a negligible 0.25%, preventing the ghost images and flare that can obscure low-contrast planetary detail. The result is a clean, high-contrast view that preserves the brightness of the original image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePlaneoptically Polished: Preserving Sharpness at High Magnification\u003c\/h3\u003e\n\u003cp\u003eA filter is worthless if it degrades your telescope's resolution. Baader filters are planeoptically polished to the same standard as high-end optical windows, ensuring they do not introduce aberrations or soften the image, even at the highest magnifications. Cheaper, unpolished \"raw polished\" filters can distort the wavefront and ruin a sharp view, a limitation the Baader set is engineered to prevent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eLargest Free Opening: Eliminating Vignetting Across the Field\u003c\/h3\u003e\n\u003cp\u003eBaader engineers their filter cells to provide the largest possible clear aperture on the market. This design choice completely eliminates vignetting (the dimming of the field edge), which can be a problem with other filters, especially when used with wide-field eyepieces. Your view remains evenly illuminated from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBaader vs. Generic Filters: A Difference in Optical Integrity\u003c\/h3\u003e\n\u003cp\u003eWhen choosing color filters, the primary difference lies in the quality of the glass and coatings. While generic filters can provide a basic color cast, they often compromise the entire optical train.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Substrate:\u003c\/strong\u003e The Baader set's planeoptically polished glass preserves the sharp wavefront from your telescope. Many standard filters use lower-grade glass that can visibly degrade image quality at high power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoatings:\u003c\/strong\u003e Baader's 7-layer, 0.25% reflection coatings are vastly superior to the single-layer or uncoated surfaces of budget filters, which are prone to ghosting and significant light loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVignetting:\u003c\/strong\u003e The maximized clear aperture of the Baader filters ensures they will not darken the edges of your view, a common issue with thick-celled, small-aperture alternatives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich filter in the Baader Color Filter Set is best for viewing Jupiter's Great Red Spot (GRS)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003elight blue or green filter\u003c\/strong\u003e from the set will typically provide the best contrast enhancement for Jupiter's Great Red Spot and other red-hued features in the cloud belts. These colors help to separate the red and orange tones from the surrounding white and yellow zones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader Color Filter Set improve views of Mars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader set is excellent for Martian observation. An \u003cstrong\u003eorange or red filter\u003c\/strong\u003e will dramatically increase the contrast of the dark albedo features (like Syrtis Major) against the bright orange desert. A \u003cstrong\u003eblue or green filter\u003c\/strong\u003e is useful for highlighting the planet's ice-crystal clouds and the white polar caps.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"planeoptically polished\" mean for a Baader filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003ePlaneoptically polished\u003c\/strong\u003e means the filter's glass surfaces are ground and polished to be perfectly flat and parallel, like a high-quality scientific window. This prevents the filter from distorting the light passing through it, preserving the sharpness of your telescope's image, which is especially critical for high-magnification planetary viewing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I choose a 2\" Baader Color Filter Set over a 1.25\" set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should choose the 2\" set if you primarily use 2\" eyepieces for your lunar and planetary observing. While less common for high-power viewing, using 2\" filters with 2\" eyepieces eliminates the need for adapters and ensures you never encounter vignetting, even with very long focal length, wide-field eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the filters in the Baader Color Filter Set parfocal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBaader filters are manufactured to tight tolerances and are nearly parfocal, meaning they require very little, if any, refocusing when switching between them. However, due to minute differences in the glass, you may need to make a tiny adjustment to the focuser to achieve perfect sharpness after changing filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack filters from the Baader Color Filter Set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the filter cells have threads on both sides, allowing you to stack them. However, stacking color filters is generally not recommended for planetary viewing as it significantly dims the image and can create unnatural color casts. It's usually more effective to use a single filter that is appropriate for the target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" Round Mounted, 2\" Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Count\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Quality\u003c\/td\u003e\n\u003ctd\u003ePlaneoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eDouble 7-Layer Phantom Group Anti-Reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidual Reflection\u003c\/td\u003e\n\u003ctd\u003e0.25% per surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eLargest free opening to eliminate vignetting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.04 (1.25\" Round Mounted)\u003cbr\u003e0.07 (2\" Round Mounted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eFilter-Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eColor, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eBandpass, Longpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Color_Filters_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Color Filters Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" Round Mounted","offer_id":44967361839389,"sku":"BAA-2458300","price":401.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":44967361872157,"sku":"BAA-2458310","price":605.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Color-Filter-Set-6-Colors-1__26791.1597110981.1280.1280.jpg?v=1684341108"},{"product_id":"baader-moon-skyglow-filter","title":"Baader Moon \u0026 Skyglow Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnhances lunar and planetary contrast with a Neodymium glass substrate\u003c\/li\u003e\n\u003cli\u003eSuppresses skyglow from artificial lighting without aggressive color shifting\u003c\/li\u003e\n\u003cli\u003eFeatures an integrated UV\/IR-cut filter for sharper digital imaging\u003c\/li\u003e\n\u003cli\u003ePlaneoptically polished for aberration-free use anywhere in the optical train\u003c\/li\u003e\n\u003cli\u003eAvailable in both 1.25\" and 2\" standard filter sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eBaader Moon \u0026amp; Skyglow Filter\u003c\/h2\u003e\n      \u003cp\u003eThe Baader Moon \u0026amp; Skyglow Filter, available in 1.25\" and 2\" round mounted cells, is a multi-bandpass filter that dramatically boosts lunar and planetary contrast by isolating key wavelengths with its neodymium-infused substrate. This single filter also serves as a mild light pollution suppressor and a full UV\/IR-cut filter, making it a uniquely versatile tool for both visual observers and DSLR imagers using either the 1.25\" or 2\" format.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eNeodymium Glass: Selective Contrast for Planetary Detail\u003c\/h3\u003e\n      \u003cp\u003eBased on a Carl Zeiss formulation, the filter's core is neodymium-doped optical glass. This material selectively notches out specific wavelengths, particularly in the yellow-orange part of the spectrum associated with sodium-vapor streetlights. This has the effect of boosting the relative transmission of reds and blues, making surface details on celestial objects much more distinct.\u003c\/p\u003e\n      \u003cp\u003eVisually, this translates to a more defined Great Red Spot (GRS) on Jupiter, clearer separation of Martian polar caps from the ruddy desert, and enhanced texture in lunar maria and crater walls. Unlike simple color filters, it achieves this contrast gain while maintaining a more natural color balance across the entire field.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSkyglow Suppression Without Unnatural Color Shift\u003c\/h3\u003e\n      \u003cp\u003eWhile designed for planetary and lunar work, the filter's ability to block common sources of light pollution makes it an effective tool for deep-sky observing from suburban skies. It darkens the background sky by filtering out the primary emission lines from older street lighting, increasing the visibility of nebulae and galaxies.\u003c\/p\u003e\n      \u003cp\u003eThe key trade-off is its subtlety. It is not a heavy-handed narrowband filter that produces a strong color cast. Instead, it provides a noticeable improvement in signal-to-noise ratio while preserving the natural colors of star fields and galaxies, making it a preferred choice for observers who dislike the artificial green or blue tint of aggressive UHC or CLS filters.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eIntegrated UV\/IR Cut for Sharper Digital Imaging\u003c\/h3\u003e\n      \u003cp\u003eThe Baader Moon \u0026amp; Skyglow is effectively three filters in one, incorporating a full UV\/IR blocking coating. This is critical for digital astrophotography, as camera sensors are sensitive to ultraviolet and infrared light that is invisible to the human eye and unfocused by most telescopes. This out-of-focus light can cause star bloat, reduce contrast, and wash out fine detail.\u003c\/p\u003e\n      \u003cp\u003eBy blocking these wavelengths, the filter ensures that only the focused, visible-light image reaches the sensor. This results in tighter, sharper stars and a cleaner signal, eliminating the need to stack a separate Luminance (UV\/IR-Cut) filter when imaging from light-polluted areas with a color camera or DSLR.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003ePlaneoptically Polished: Sharpness in 1.25\" or 2\" Optical Trains\u003c\/h3\u003e\n      \u003cp\u003eEach Moon \u0026amp; Skyglow filter is planeoptically polished to an exacting standard, ensuring the glass surfaces are perfectly parallel. This prevents the introduction of optical aberrations like astigmatism, even when the filter is placed far from the focal plane—such as in front of a binoviewer or star diagonal.\u003c\/p\u003e\n      \u003cp\u003eThis manufacturing discipline means you can place the 1.25\" or 2\" filter anywhere in your imaging or visual train without degrading the performance of your primary optics. Cheaper filters with non-parallel surfaces can noticeably soften the image when used in these positions, but the Baader maintains the full sharpness of your telescope system.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eMoon \u0026amp; Skyglow vs. Traditional LPR Filters: A Broader Approach\u003c\/h3\u003e\n      \u003cp\u003eIt's important to distinguish the Moon \u0026amp; Skyglow filter from typical broadband Light Pollution Reduction (LPR) filters. While both combat skyglow, their design philosophies differ significantly.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eColor Balance:\u003c\/strong\u003e Traditional LPR filters often create a strong green-blue color cast, which can be unnatural for anything other than emission nebulae. The Moon \u0026amp; Skyglow filter is engineered to produce a more neutral, balanced view that enhances color separation rather than shifting it.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePrimary Target:\u003c\/strong\u003e Most LPR filters are optimized for deep-sky objects, specifically nebulae. The Moon \u0026amp; Skyglow is a hybrid, designed first for high-contrast lunar and planetary viewing, with its skyglow reduction serving as a powerful secondary benefit for all object types.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTransmission Curve:\u003c\/strong\u003e The Moon \u0026amp; Skyglow filter uses narrow, selective \"notches\" to block specific pollution lines. Many LPR filters use broader bandpass windows, which can sometimes suppress faint starlight along with the pollution.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader Moon \u0026amp; Skyglow filter make Jupiter's Great Red Spot more visible?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe filter's neodymium glass selectively blocks light in the yellow-orange part of the spectrum. This increases the relative contrast between the red wavelengths of the Great Red Spot and the surrounding beige and yellow cloud bands of Jupiter. By suppressing the \"background\" yellow light, the red features become significantly more prominent and easier to see.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader Moon \u0026amp; Skyglow filter a good choice for imaging the Orion Nebula (M42) with a DSLR from the suburbs?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it's an excellent choice for that specific scenario. The filter provides three key benefits for imaging an object like the Orion Nebula (M42) from a light-polluted area:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSkyglow Reduction:\u003c\/strong\u003e It will darken the sky background, increasing the contrast of the nebula's faint outer loops.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eColor Enhancement:\u003c\/strong\u003e It subtly boosts the reds of the hydrogen-alpha regions without completely altering the natural color of the Trapezium stars.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eUV\/IR Cut:\u003c\/strong\u003e It prevents star bloat from unfocused infrared and ultraviolet light, resulting in sharper stars throughout the image, which is a common issue for DSLR cameras without a modified filter.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader Moon \u0026amp; Skyglow filter help with modern LED light pollution?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003ePartially. The filter is most effective against older sodium-vapor (yellow) and mercury-vapor (blue-white) streetlights. Modern white LED lighting is broadband, meaning it emits light across the entire visible spectrum. While the Moon \u0026amp; Skyglow filter will still improve contrast and darken the sky slightly, it cannot eliminate the full impact of broadband LED pollution like a dedicated multi-bandpass narrowband filter can.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack the Baader Moon \u0026amp; Skyglow filter with other color filters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Because it provides a general contrast boost across the spectrum, it can be stacked with traditional planetary color filters (like a #21 Orange or #80A Medium Blue) to further isolate specific details. The Moon \u0026amp; Skyglow acts as a foundational contrast booster, while the added color filter provides more targeted analysis of features like Martian dust storms or Jovian cloud belts.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is this filter called \"Moon \u0026amp; Skyglow\" if it also works so well on planets?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe name highlights its two primary functions. It enhances contrast on the Moon's grey surface features just as effectively as it does on colorful planets. The \"Skyglow\" part of the name refers to its light pollution reduction capability, which darkens the background sky during any type of observing, whether lunar, planetary, or deep-sky.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate IR-cut filter for imaging if I use the Baader Moon \u0026amp; Skyglow?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The Baader Moon \u0026amp; Skyglow filter has a full UV\/IR blocking coating built-in. It serves as a \"luminance\" filter in addition to its contrast-enhancing properties, so you do not need to add a separate UV\/IR-cut filter to your imaging train when using it.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003e1.25\" Round Mounted, 2\" Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eCCD, Contrast Enhancement, Color Correction, IR-Cut, Light Pollution Reduction, Lunar, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Filter_Problems_FAQ_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Filter Problems FAQ Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Neodymium_Moon_and_Skyglow_Filter_Product_Information.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Neodymium Moon and Skyglow Filter Product Information\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" Round Mounted","offer_id":44967363707165,"sku":"BAA-2458305A","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":44967363739933,"sku":"BAA-2458334A","price":213.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Moon-Skyglowfilter-1-25-inch-1__79976.1597110984.1280.1280.jpg?v=1684341362"},{"product_id":"baader-u-venus-filter-350nm","title":"Baader U-Venus Filter - 350nm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e350nm Central Wavelength\u003c\/li\u003e\n\u003cli\u003e60nm Bandwidth (320-380nm)\u003c\/li\u003e\n\u003cli\u003e~80% Peak Transmission\u003c\/li\u003e\n\u003cli\u003eBlocks Visible and IR light from 200nm to 1120nm\u003c\/li\u003e\n\u003cli\u003eDielectric Multi-Coated Schott Glass\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eBaader U-Venus Filter - 350nm\u003c\/h2\u003e\n\u003cp\u003eThe Baader U-Venus Filter isolates a specific 60nm bandpass centered on 350nm, designed to reveal the high-contrast cloud structures of the Venusian atmosphere otherwise invisible to the eye. It achieves approximately 80% peak transmission within its 320-380nm window while completely blocking the entire visual and infrared spectrum from 200nm to 1120nm, ensuring only pure ultraviolet data reaches your sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIsolating Venus's Atmosphere: The 350nm UV Window\u003c\/h3\u003e\n\u003cp\u003eIn visible light, Venus presents as a brilliant, featureless white disc due to its dense, highly reflective cloud deck. However, at the deep ultraviolet wavelength of 350nm, atmospheric chemicals like sulfur dioxide absorb sunlight, creating dark, dynamic patterns. The Baader U-Venus filter precisely targets this 350nm window, transforming the planet from a blank canvas into a world of swirling clouds and complex weather systems for your camera to capture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAdvanced Coatings for 80% Transmission and Deep Blocking\u003c\/h3\u003e\n\u003cp\u003eThis filter's effectiveness comes from its advanced dielectric multi-coatings, applied to an optically polished Schott glass substrate. These coatings deliver a high peak transmission of approximately 80% within the narrow 60nm passband. Critically, the filter provides complete blocking of all other wavelengths from 200nm up to 1120nm, eliminating contamination from visible and near-infrared light that would otherwise overwhelm the faint UV signal and wash out delicate cloud details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eImaging Venus with a 5\" Telescope and UV-Sensitive Camera\u003c\/h3\u003e\n\u003cp\u003eImaging in the deep UV is a demanding technique that requires a specific equipment setup. The Baader U-Venus filter is not a visual accessory; it is designed for use with a monochrome astronomy camera that has high sensitivity in the ultraviolet spectrum. Due to the dimness of the UV signal, a telescope with a minimum aperture of 5 inches is required, though an 8-inch or larger instrument is strongly recommended to achieve a bright enough image for the short exposures used in lucky imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Baader U-Venus filter centered at 350nm for imaging Venus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eVenus's surface is hidden by a uniform, highly reflective cloud deck in visible light. At \u003cstrong\u003e350nm in the deep ultraviolet\u003c\/strong\u003e, specific chemicals in the atmosphere absorb sunlight, creating dark, high-contrast patterns. This allows imagers to capture the dynamic cloud structures and weather systems that are otherwise completely invisible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera do I need for the Baader U-Venus 350nm filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must use a \u003cstrong\u003emonochrome imaging camera\u003c\/strong\u003e with high sensitivity in the ultraviolet spectrum. Standard color cameras have internal filters that block UV light, and many older mono cameras have low UV quantum efficiency. Modern mono CMOS sensors are generally the best choice for this application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see Venus's clouds visually with the Baader U-Venus filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e The human eye is not sensitive to the 320-380nm wavelengths passed by this filter. It is designed exclusively for photographic and electronic imaging with UV-sensitive cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader U-Venus 350nm filter work with my 4\" refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile you might record a faint signal, it is \u003cstrong\u003enot recommended\u003c\/strong\u003e. Successful UV imaging requires significant light-gathering power. Baader recommends a minimum aperture of 5 inches, with 8 inches or more being ideal to achieve a bright enough image for lucky imaging techniques and to overcome the dimness of the UV signal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the deep blocking from 200nm to 1120nm improve images with the Baader U-Venus filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBy completely blocking all visible and near-infrared light, the filter ensures that only the desired 350nm UV signal reaches the sensor. This prevents longer wavelengths from \"leaking\" through and washing out the faint UV cloud details, which dramatically \u003cstrong\u003eincreases contrast\u003c\/strong\u003e and reveals subtle atmospheric features.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader U-Venus 350nm filter for deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is not its intended purpose. While some specialized research involves UV imaging of reflection nebulae or specific star types, the vast majority of deep-sky objects are extremely dim in the UV. This filter is highly optimized for imaging the solar system's brightest inner planet, \u003cstrong\u003eVenus\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" \u0026amp; 2\" Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Wavelength (CWL)\u003c\/td\u003e\n\u003ctd\u003e350nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e60nm (320nm - 380nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd\u003e~80%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e200nm - 1120nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eOptically Polished Schott Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eDielectric Multi-Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eSpecialty, UV-Pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eNarrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003eUV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003edielectrically coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader U-Venus Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" Round Mounted","offer_id":44967365476637,"sku":"BAA-2458292","price":348.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":44967365509405,"sku":"BAA-2458291","price":487.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-U-Venus-Filter-350nm-1__53498.1597110999.1280.1280.jpg?v=1684341185"}],"url":"https:\/\/davidastro.com\/collections\/baader-planetary-and-moon-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}