{"title":"Solar Filters \u0026 Wedges","description":null,"products":[{"product_id":"celestron-eclipsmart-solar-filter-6-sct","title":"Celestron EclipSmart Solar Filter - 6” SCT","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for Celestron 6\" Schmidt-Cassegrain Telescopes\u003c\/li\u003e\n\u003cli\u003eProvides a 128.5mm (5.06\") clear aperture for safe solar viewing\u003c\/li\u003e\n\u003cli\u003eISO 12312-2:2015(E) compliant Solar Safe filter technology\u003c\/li\u003e\n\u003cli\u003eBlocks 99.999% of visible light plus harmful IR and UV radiation\u003c\/li\u003e\n\u003cli\u003eRenders the Sun in a natural, high-contrast orange color\u003c\/li\u003e\n\u003cli\u003eSecures with two 1\" x 4\" hook and loop safety straps\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\u003eCelestron EclipSmart Solar Filter for 6” Schmidt-Cassegrain Telescopes\u003c\/h2\u003e\n\u003cp\u003eThe Celestron EclipSmart Solar Filter transforms your 6\" Schmidt-Cassegrain into a dedicated solar observatory, featuring a 128.5mm clear aperture for detailed views of sunspots and eclipses. This filter conforms to the ISO 12312-2:2015(E) international safety standard, blocking 99.999% of visible light and all harmful UV and IR radiation. Weighing just 2.6 oz (74 g), it attaches securely without compromising your telescope's balance, providing a safe, high-contrast view of the Sun in a natural orange hue.\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\u003eISO 12312-2 Certified Solar Safe Technology\u003c\/h3\u003e\n\u003cp\u003eThe core of the EclipSmart filter is its Solar Safe technology, which meets the stringent transmission requirements of ISO 12312-2:2015(E). The scratch-resistant polymer, produced by American Paper Optics, has been independently tested to guarantee protection from harmful solar radiation. This allows you to directly and safely observe sunspots, planetary transits, and all phases of a solar eclipse.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Radiation Blocking:\u003c\/strong\u003e The filter material eliminates dangerous infrared (IR) and ultraviolet (UV) light while reducing visible light to a safe, neutral-density level.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural Orange View:\u003c\/strong\u003e The filter is engineered to produce a solar image with a pleasing and natural-looking orange color, which enhances contrast on solar granulation and sunspot details.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First:\u003c\/strong\u003e Before every use, you should inspect the filter surface for any damage, punctures, or separation from the frame to ensure your observing session is completely safe.\n\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\u003eA 128.5mm Custom Fit for 6\" Celestron SCTs\u003c\/h3\u003e\n\u003cp\u003eThis EclipSmart filter is engineered with an internal diameter of 174mm for a precise, snug fit on Celestron 6\" Schmidt-Cassegrain optical tubes. The design prevents accidental slippage and ensures no unfiltered sunlight can enter the telescope. Two 1\" x 4\" hook and loop straps, combined with four adhesive tabs, provide a redundant safety system that holds the filter securely in place, even if the telescope is bumped or subjected to a light breeze.\u003c\/p\u003e\n\u003cp\u003eThe generous 128.5mm clear aperture ensures you use the full resolving power of your 6\" telescope, delivering bright and detailed views. This filter is confirmed to be compatible with a wide range of models, including the NexStar 6SE, NexStar Evolution 6, and Advanced VX 6\" SCTs.\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\"\u003eHow do I correctly install the EclipSmart filter on my NexStar 6SE?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo install the EclipSmart filter, first place the four 1\" x 1\" hook and loop tabs evenly around the outer edge of your telescope tube's front cell. Slide the filter over the front of the telescope until it fits snugly. Finally, attach the two 1\" x 4\" safety straps by wrapping them around the telescope tube and securing them tightly to the filter. Always check that the filter is secure and cannot be accidentally dislodged before pointing the telescope at the Sun.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the EclipSmart filter safe for viewing all phases of a solar eclipse?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The EclipSmart filter is ISO 12312-2:2015(E) compliant and designed for safe viewing of all partial phases of a solar eclipse. You must use the filter whenever any part of the Sun's bright photosphere is visible. It is only safe to remove the filter during the brief period of totality, if you are in the correct location, and you must replace it immediately as soon as the Sun begins to reappear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the orange solar image color provided by the EclipSmart filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe orange tint is often preferred by solar observers because it provides a more natural and aesthetically pleasing view of the Sun compared to stark white-light filters. This color can also help improve visual contrast on subtle surface features like sunspots and faculae, making them easier to discern.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this EclipSmart filter fit any 6\" telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is specifically designed for Celestron 6\" Schmidt-Cassegrain telescopes, with an internal diameter of 174mm (6.85\"). It will not fit other 6\" telescopes like Newtonian reflectors or refractors, which have different outer tube diameters. Always measure the external diameter of your telescope's front cell before purchasing a solar filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the EclipSmart filter for solar imaging with my 6\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The EclipSmart filter is an excellent and affordable option for starting in solar astrophotography. It reduces the Sun's brightness to a safe level for your camera sensor, allowing you to capture detailed images of sunspots and solar eclipses through your Celestron 6\" SCT.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat should I do if I find a scratch or pinhole on my EclipSmart filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf your filter is damaged, torn, punctured, or separated from its frame in any way, you must discard it immediately. Never use a compromised solar filter, as it can lead to permanent and irreversible eye damage. Always inspect your filter carefully before each and every observing session.\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\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003eCelestron 6\" Schmidt-Cassegrain Telescopes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Clear Aperture\u003c\/td\u003e\n\u003ctd\u003e128.5mm (5.06\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Material\u003c\/td\u003e\n\u003ctd\u003eScratch resistant polymer (American Paper Optics)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eISO 12312-2:2015(E)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Image Color\u003c\/td\u003e\n\u003ctd\u003eOrange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Diameter\u003c\/td\u003e\n\u003ctd\u003e184mm (7.24\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Diameter\u003c\/td\u003e\n\u003ctd\u003e174mm (6.85\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd\u003e24mm (0.94\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.6 oz (74 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Straps\u003c\/td\u003e\n\u003ctd\u003eTwo 1\" x 4\" hook and loop straps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Tabs\u003c\/td\u003e\n\u003ctd\u003eFour 1\" x 1\" hook and loop Tabs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"text-align:center; font-weight:bold; padding-top:20px;\"\u003eSolar Warning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eOnly observe the Sun with ISO-compliant eye protection, such as the filter found in this EclipSmart product. Never look directly at the Sun with the naked eye or a non-filtered optic. Permanent and irreversible eye damage may result. Never tamper with or remove the permanently placed glass filters in this optic. Doing so is dangerous and will void your warranty. Never leave your optic unsupervised. Make sure an adult who is familiar with its correct operating procedures is with your optic at all times, especially when children are present. Never remove your eye protection when looking directly at the Sun during partial phases of a solar eclipse.\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\"\u003eEclipSmart Solar Filter for 6” SCT\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1\" x 4\" Hook and Loop Straps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1\" x 1\" Hook and Loop Tabs\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\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\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149666589,"sku":"CEL-94243","price":83.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-EclipSmart-Solar-Filter-6-inch-SCT-94243-1__50619.1594229205.1280.1280.jpg?v=1684337265"},{"product_id":"celestron-eclipsmart-solar-filter-8-sct-and-edgehd","title":"Celestron EclipSmart Solar Filter - 8” SCT and EdgeHD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInstantly adapts your Celestron 8” Schmidt-Cassegrain or EdgeHD telescope for solar viewing\u003c\/li\u003e\n\u003cli\u003eConforms to the ISO 12312-2:2015(E) international safety standard for direct solar observation\u003c\/li\u003e\n\u003cli\u003eFeatures a 176mm clear aperture for unobstructed views\u003c\/li\u003e\n\u003cli\u003eProduces a natural, glare-free orange-tinted image of the Sun\u003c\/li\u003e\n\u003cli\u003eSecures to your telescope with two 1\" x 4\" hook and loop straps for a safe fit\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\u003eCelestron EclipSmart Solar Filter for 8” Schmidt-Cassegrain and EdgeHD Telescopes\u003c\/h2\u003e\n\u003cp\u003eThe Celestron EclipSmart Solar Filter transforms your 8-inch SCT or EdgeHD telescope into a dedicated solar observatory, featuring a 176mm clear aperture and ISO 12312-2:2015(E) compliant filter material. This lightweight, 4.2 oz filter is custom-designed with a 225mm internal diameter for a secure fit, attaching with two 1\" x 4\" hook and loop straps to ensure safe, direct observation of sunspots, transits, and solar eclipses.\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\u003eISO 12312-2:2015 Certified: Safe Solar Views for Your 8\" Telescope\u003c\/h3\u003e\n\u003cp\u003eThe core of the EclipSmart filter is its Solar Safe technology, which has been independently tested to meet the rigorous transmission requirements of the ISO 12312-2:2015(E) international safety standard. The scratch-resistant polymer, produced by American Paper Optics, blocks 99.999% of visible light and all harmful IR and UV radiation. This allows you to safely observe the Sun's photosphere in detail, revealing sunspots and granulation in a natural, pleasing orange hue.\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\u003eCustom 225mm Fit for Celestron SCT \u0026amp; EdgeHD: Secure Mounting and Full Aperture\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for Celestron's 8\" optical tubes, this filter has an internal diameter of 225mm and an external diameter of 235mm, ensuring a snug fit without damaging your telescope's finish. The included safety kit, with two 1\" x 4\" straps and four adhesive tabs, prevents the filter from being accidentally dislodged by wind or bumps. The filter's generous 176mm clear aperture ensures your telescope's full resolving power is dedicated to the solar disk, preventing any vignetting or reduction in image brightness.\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\"\u003eWill the EclipSmart filter fit non-Celestron 8\" telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter is custom-designed for the \u003cstrong\u003e235mm external diameter\u003c\/strong\u003e of Celestron 8\" SCT and EdgeHD optical tubes. While it might fit other telescopes with similar dimensions, you must verify the outer diameter of your specific telescope to ensure a safe, secure fit before purchasing. An unsecured filter is extremely dangerous.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the EclipSmart Solar Filter to my NexStar 8SE?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo attach the filter, first apply the four 1\" x 1\" self-adhesive hook-and-loop tabs to the body of your telescope, spaced evenly around the front cell. Place the filter over the front of the telescope. Then, thread the two 1\" x 4\" hook-and-loop straps through the safety tabs on the filter housing and secure them tightly to the tabs on the telescope tube. Always check that the filter is secure before pointing the telescope at the Sun.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see solar flares or prominences with the EclipSmart filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This is a \u003cstrong\u003ewhite-light solar filter\u003c\/strong\u003e, designed for observing the Sun's surface (photosphere), which includes sunspots, granulation, and planetary transits. Solar flares and prominences are features of the chromosphere and require a specialized, narrow-band Hydrogen-alpha (H-alpha) telescope or filter to be seen.\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 176mm clear aperture and the 225mm internal diameter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e225mm internal diameter\u003c\/strong\u003e refers to the size of the filter's housing, designed to slip over the front of your 8\" telescope. The \u003cstrong\u003e176mm clear aperture\u003c\/strong\u003e is the usable diameter of the solar filter material itself. This size is large enough to ensure that the entire primary mirror of your telescope is illuminated without being obstructed by the filter's frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I clean and store my EclipSmart solar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eGently blow off any loose particles with a hand-blower. If further cleaning is needed, use a soft, lint-free cloth with a non-abrasive optical cleaning solution. Avoid harsh chemicals. Always inspect the filter for scratches or damage before each use. Store it in the included plastic protective case to prevent damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it safe to use this EclipSmart filter for imaging the Sun with my CPC 800?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The EclipSmart filter is safe for both visual observation and solar imaging. Because it fits over the front of the telescope, it rejects the Sun's energy before it enters the optical tube, keeping the internal components cool and safe. You can attach a planetary camera or DSLR to your CPC 800 as you normally would for astrophotography.\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\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003eCelestron 8\" Schmidt-Cassegrain and EdgeHD Telescopes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Clear Aperture\u003c\/td\u003e\n\u003ctd\u003e176mm (6.93\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter External Diameter\u003c\/td\u003e\n\u003ctd\u003e235mm (9.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Internal Diameter\u003c\/td\u003e\n\u003ctd\u003e225mm (9.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Material\u003c\/td\u003e\n\u003ctd\u003eScratch resistant polymer (American Paper Optics)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eISO Certification\u003c\/td\u003e\n\u003ctd\u003eISO 12312-2:2015(E) Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Image Color\u003c\/td\u003e\n\u003ctd\u003eOrange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.2 oz (121 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd\u003e32mm (1.26\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Straps\u003c\/td\u003e\n\u003ctd\u003eTwo 1\" x 4\" hook and loop straps, Four 1\" x 1\" hook and loop tabs\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\"\u003eEclipSmart Solar Filter for 8” Telescopes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1\" x 4\" Hook and Loop Straps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1\" x 1\" Hook and Loop Tabs\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlastic Protective Case\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\/Celestron_EclipSmart_Solar_Filters_Manual.pdf?v=1782186981\" 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\"\u003eDownload EclipSmart Solar Filters 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\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149699357,"sku":"CEL-94244","price":104.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-EclipSmart-Solar-Filter-8-inch-SCT-and-EdgeHD-94244-1__82923.1594229206.1280.1280.jpg?v=1684337272"},{"product_id":"baader-solar-continuum-filter","title":"Baader Solar Continuum Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMaximizes contrast on solar granulation, faculae, and sunspot details\u003c\/li\u003e\n\u003cli\u003eDramatically reduces chromatic aberration in achromatic refractors\u003c\/li\u003e\n\u003cli\u003eFunctions as a secondary filter, requiring a primary white-light solar filter for safe use\u003c\/li\u003e\n\u003cli\u003eAvailable in standard 1.25\" and 2\" round mounted formats\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 Solar Continuum Filter\u003c\/h2\u003e\n\u003cp\u003eThe Baader Solar Continuum Filter, available in both 1.25\" and 2\" formats, isolates the narrow spectral region where solar granulation and sunspot details exhibit maximum contrast. By blocking unfocused wavelengths, this filter dramatically sharpens the image in achromatic refractors, making it an essential tool for high-resolution white-light solar observation in either the 1.25\" or 2\" size.\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 the Solar Continuum: Maximizing Contrast on Granulation and Faculae\u003c\/h3\u003e\n\u003cp\u003eThis filter works by isolating a very specific slice of the solar spectrum, effectively removing the visual noise from other wavelengths. This narrowband approach reveals the intricate, fine structure of the photosphere that is normally washed out. With the Solar Continuum filter, you can clearly resolve the boiling pattern of solar granulation, see bright faculae stand out against the solar limb, and discern the complex details within sunspot penumbrae.\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 Achromat's Best Friend: Eliminating Chromatic Aberration for Sharper Solar Views\u003c\/h3\u003e\n\u003cp\u003eAchromatic refractors, while excellent instruments, suffer from chromatic aberration—a purple or blue halo of unfocused light that softens the image. The Baader Solar Continuum filter completely eliminates this issue for solar viewing. By transmitting only a narrow band of light where the refractor's optics are sharpest, it delivers a view that is free of color fringing, transforming the performance of an achromat to near-apochromatic levels for solar observation.\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\u003eContinuum Filter vs. White-Light Film: A Side-by-Side Comparison\u003c\/h3\u003e\n\u003cp\u003eA standard white-light solar film provides a safe, full-spectrum view of the sun. The Baader Solar Continuum filter is not a substitute for this primary filter; it is an enhancement used in conjunction with it. While the film alone shows sunspots, the addition of the Continuum filter reveals a new level of detail, making it an indispensable tool for serious solar observers seeking the highest possible contrast and resolution.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard White-Light Filter:\u003c\/strong\u003e Shows sunspots and basic solar features. Can appear soft in achromatic refractors due to chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWith Solar Continuum Filter Added:\u003c\/strong\u003e Reveals fine granulation across the solar disk, enhances bright faculae, and resolves intricate details in sunspot structure. The view becomes significantly sharper and more detailed.\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\"\u003eIs the Baader Solar Continuum Filter safe to use by itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eABSOLUTELY NOT.\u003c\/strong\u003e The Solar Continuum Filter is a secondary filter and must always be used with a primary, front-mounted, professional-grade solar filter like Baader AstroSolar Safety Film. Using this filter alone will cause instant and permanent eye damage and destroy your equipment. It only enhances the view from a telescope that has already been made safe for solar viewing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat specific features does the Baader Solar Continuum Filter enhance?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter is designed to dramatically increase the contrast of features in the Sun's photosphere. You will see a significant improvement in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Granulation:\u003c\/strong\u003e The \"boiling rice\" texture of the solar surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaculae:\u003c\/strong\u003e Bright, hot regions, especially visible near the solar limb.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunspot Structure:\u003c\/strong\u003e The dark umbra and the filamentary penumbra of sunspots become much sharper and more detailed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have an 80mm f\/7 achromatic refractor. How will the Baader Solar Continuum Filter improve my view of sunspot group AR 3664?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor your telescope, the improvement will be dramatic. The filter will completely eliminate the purple fringe (chromatic aberration) that softens the view in your achromat. This will make the contrast between the sunspot's dark umbra and its lighter, detailed penumbra much more distinct, allowing you to resolve finer structures within the sunspot group.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader Solar Continuum Filter with my reflector or SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While the most significant benefit is seen in achromatic refractors due to its ability to cut chromatic aberration, the filter still provides a noticeable contrast boost in any telescope type, including reflectors, SCTs, and apochromatic refractors. By isolating the ideal spectral region, it enhances photospheric detail regardless of the optical design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader Solar Continuum Filter perform for imaging the Sun with a monochrome camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is an outstanding filter for high-resolution solar imaging with a monochrome camera. By isolating a narrow band of the spectrum, it reduces the blurring effects of atmospheric turbulence (seeing), similar to how planetary imagers use color filters. This results in significantly sharper, higher-contrast images of granulation and sunspots.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between the 1.25\" and 2\" Baader Solar Continuum Filter options?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe optical performance and filtering effect are identical between the two. The only difference is the physical size of the filter cell. You should choose the size that matches your eyepieces, diagonals, or camera nosepiece, either \u003cstrong\u003e1.25\"\u003c\/strong\u003e or \u003cstrong\u003e2\"\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 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\u003eCMOS, Contrast Enhancement, Solar\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\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHBW (Halfbandwidth)\u003c\/td\u003e\n\u003ctd\u003e7.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e540 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003e535 – 545 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™ hard 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 Solar Continuum Filter (in selected 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\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":44967364722973,"sku":"BAA-2961580","price":172.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":44967364755741,"sku":"BAA-2961581","price":289.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Solar-Continuum-Filter-1__25543.1597110995.1280.1280.jpg?v=1684341370"},{"product_id":"baader-solar-continuum-double-stacked-filter-1-25","title":"Baader Solar Continuum Double Stacked Filter - 1.25\"","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e1¼\" Double Stacked Baader Solar Continuum Filter. 8nm \/ CWL 540nm.\u003c\/li\u003e\n\u003cli\u003eIncludes 1x AstroSolar\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003ePhoto Film OD 3.8 20x29 cm. The filter includes two Baader Solar Continuum Filters in a single filter cell which have been stacked for even higher contrast.\u003c\/li\u003e\n\u003cli\u003eEnhances the contrast and reduces the effect of atmospheric turbulence.\u003c\/li\u003e\n\u003cli\u003eThis filter must be used in conjunction with a Baader Herschel Wedge or Baader AstroSolar\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003eSafety Film 5.0 (not included) for visual solar observations otherwise permanent visual and equipment damage may occur. The included Baader AstroSolar\u003csup\u003e®\u003c\/sup\u003e\u003cspan\u003e\u003c\/span\u003ePhoto Film 3.8 must never be used for visual observation but only for solar photography (e.g. lucky imaging).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe new Baader Solar Continuum filter is designed to enhance the visibility of solar granulation and sunspot details. By transmitting a specific spectral region around 540nm, free of emission and absorption lines, the Solar Continuum filter is able to boost contrast and reduce the effects of atmospheric turbulence. With the Solar Continuum filter in place, images snap to focus, and granulation becomes regularly visible. Details at the limit of visibility become easier to hold, and image motion reduced.\u003c\/p\u003e\u003cp\u003eThe Solar Continuum filter works well in all types of telescopes, for both visual and imaging. Users of SCTs and achromatic refractors will find it particularly beneficial, as it completely excludes the red and blue wavelengths, and centers on the peak visual wavelengths where the telescope optics are sharpest and free from chromatic aberrations. For digital imaging, we also recommend the Continuum filter be combined with our UV\/IR Cut Filter (to completely cut the defocused far infrared wavelengths).\u003c\/p\u003e\u003cp\u003eThe Solar Continuum filter also makes the perfect star test filter. It's narrow bandpass and complete blockage of longer and shorter wavelengths make it superior to standard green colored filters for testing refractors at their center design wavelength (and peak visual wavelength). With this filter, more accurate appraisals of optical quality can be made, without the effects of spherochromatism or secondary color error. Due to the narrow 10nm bandpass, star testing through the Solar Continuum filter will require a bright test star.\u003c\/p\u003e\u003cp\u003eAs with all Baader Planetarium Filters, the Solar Continuum possesses all the trademark Baader filter qualities. Optical, Physical, and Mechanical quality are superb. For a summary of filter features, please see the Filters page.\u003c\/p\u003e\u003cp\u003eThe combination of AstroSolar® Photo Film 3.8 and Solar Continuum filter is used exclusively for photography of the sun at high magnifications. This combination is highly apt to capture the finest solar surface detail and granulation at extremely high magnification while enabling ultra-short exposure (measured in milliseconds) in order to freeze atmospheric turbulence.\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePlease Note:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003eFor safe use, the Solar Continuum filter must be used in conjunction with a primary solar filter (ie, Herschel Wedge Prism, or Baader AstroSolar Film). It must be placed After the primary filter, and cannot be used alone, or permanent eye and equipment damage will result.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cdiv\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_filterkurve_kontinuum.gif?v=1684340714?v=1586875464\" target=\"_blank\"\u003e\u003cimg alt=\" src=\" https:\u003e\u003c\/a\u003e\u003c\/div\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_filterkurve_kontinuum.gif?v=1684340714?v=1586875464\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cp\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch2\u003e1.25\"\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU (#)\u003c\/th\u003e\n\u003ctd\u003e2458392\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEAN CODE\u003c\/th\u003e\n\u003ctd\u003e4047825009371\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWEIGHT (KG)\u003c\/th\u003e\n\u003ctd\u003e0.026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd\u003e536 – 544 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd\u003e8nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd\u003e540 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAR-COATING\u003c\/th\u003e\n\u003ctd\u003edielectrically coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPECIAL FEATURES\u003c\/th\u003e\n\u003ctd\u003edoube stacked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd\u003e1 25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd\u003eContrast Enhancement, Solar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd\u003eMounted (classic 8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd\u003eNarrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Problems with filters can have the strangest causes\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967364788509,"sku":"BAA-2458392","price":279.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Solar-Continuum-Double-Stacked-Filter-1-25-inch-1__49049.1597110996.1280.1280.jpg?v=1684341375"},{"product_id":"baader-astrosolar-safety-film-od-5-0-eco-size-20x29cm-100x50cm-117x117cm","title":"Baader Astrosolar Safety Film OD 5.0","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptical Density 5.0 for safe, direct visual solar observation\u003c\/li\u003e\n\u003cli\u003eDoes not degrade optical wavefront, preserving sharpness and contrast\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple sizes for custom filters, from 140mm to 117cm\u003c\/li\u003e\n\u003cli\u003eRenders the sun in a neutral, realistic white color\u003c\/li\u003e\n\u003cli\u003eTrusted by astronomers for over 25 years\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 AstroSolar Safety Film OD 5.0\u003c\/h2\u003e\n\u003cp\u003eFor over 25 years, Baader AstroSolar Safety Film has been the standard for creating high-resolution, do-it-yourself solar filters. With a certified Optical Density of 5.0, this film reduces sunlight intensity by 99.999%, making direct observation of the sun completely safe through any telescope, binocular, or camera. Unlike other filter materials that impair image quality, AstroSolar is engineered to be optically flat, ensuring your instrument performs at its full magnification and resolving power on the solar surface.\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\u003eCertified OD 5.0 Safety for Direct Solar Viewing\u003c\/h3\u003e\n\u003cp\u003eThe primary function of a solar filter is safety, and AstroSolar Film delivers with a certified Optical Density (OD) of 5.0. This rating confirms that the film blocks 99.999% of all incoming solar energy, including harmful UV and IR radiation, allowing you to view sunspots, transits, and eclipses without risk. The film's reflective properties dissipate solar energy before it enters your optics, preventing heat buildup inside your telescope tube.\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\u003eUncompromised Optical Quality: Retain Full Sharpness and Contrast\u003c\/h3\u003e\n\u003cp\u003eWhat sets Baader AstroSolar Film apart is its ability to transmit a clean, unaltered optical wavefront. Cheaper films or dense glass can introduce astigmatism and other aberrations, effectively degrading your telescope's performance. AstroSolar's unique molecular structure maintains the sharpness and contrast of your optics, allowing you to push the magnification to resolve fine details like solar granulation, faculae, and the intricate structure within sunspot umbrae and penumbrae.\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\u003eBuild a Custom Filter for Any Optic up to 117cm\u003c\/h3\u003e\n\u003cp\u003eAstroSolar Safety Film is a DIY material, supplied in sheets that you can use to construct a custom-fit filter for any optical instrument. With sizes ranging from a 140x155mm \"Eco\" sheet, perfect for camera lenses or small refractors, up to a massive 117x117cm sheet for large observatory-class telescopes, there is an option for every aperture. Building your own filter cell is a straightforward project that results in a lightweight, high-performing filter for a fraction of the cost of a pre-made glass equivalent.\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\u003eAstroSolar Film vs. Welder's Glass: The Optical Difference\u003c\/h3\u003e\n\u003cp\u003eWhile often considered as a low-cost alternative, welder's glass is designed for protecting eyes from arc flashes, not for preserving the optical precision of a telescope. It severely degrades image sharpness, introduces a strong green color cast, and is not certified for the specific radiation spectrum of the sun. AstroSolar Film provides a true neutral-white image of the sun and is specifically manufactured to the optical tolerances required for high-magnification astronomical work, making it the only serious choice for detailed solar observation.\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\"\u003eIs the Baader AstroSolar Safety Film OD 5.0 safe for looking directly at the sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The \u003cstrong\u003eOptical Density 5.0\u003c\/strong\u003e rating means it is certified for direct visual observation of the sun through a telescope, binoculars, or with the naked eye, provided it has been mounted securely in a proper filter cell. It blocks 99.999% of sunlight, including all harmful UV and IR radiation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat color is the sun when viewed through the Baader AstroSolar Safety Film OD 5.0?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe sun appears as a \u003cstrong\u003eneutral, realistic white\u003c\/strong\u003e. Unlike some films or glass filters that produce an unnatural orange or yellow image, AstroSolar Film is designed for color neutrality, allowing you to see the true color of sunspots and the solar photosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I build a filter cell for my 8\" SCT using the Baader AstroSolar Film?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor an 8\" (203mm) Schmidt-Cassegrain Telescope, the \u003cstrong\u003eA4 Sheet (20x29cm)\u003c\/strong\u003e is the ideal size. You can construct a cell using cardboard, foam board, or 3D-printed parts. The key is to create a secure housing that fits over the front of your telescope, ensuring the film is held in place without being overly stretched, as slight wrinkles are normal and do not affect optical quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see solar granulation and sunspot details with the Baader AstroSolar Film OD 5.0?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This is the primary advantage of AstroSolar Film. Because it does not degrade the optical wavefront, it allows your telescope to perform at its maximum resolution. On days of good seeing, you can easily resolve \u003cstrong\u003esolar granulation\u003c\/strong\u003e, faculae, and fine details within sunspot groups, something not possible with lower-quality filter materials.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eShould the Baader AstroSolar Film be perfectly flat and tight like a drumhead?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, and you should avoid stretching it tight. The film should be mounted so that it is secure but relaxed, with slight ripples or wrinkles visible. These minor imperfections have no effect on the optical quality. Stretching the film taut can actually degrade its optical properties.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I clean and care for my filter made with Baader AstroSolar Safety Film?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe film is delicate. To clean it, use a soft, lint-free cloth (like a microfiber cloth) and a gentle cleaning solution suitable for optics, such as isopropyl alcohol diluted with distilled water. Dab gently; do not rub. Always inspect the film for scratches, pinholes, or tears before every use. If any damage is found, discard the filter immediately.\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\u003eOptical Density (OD)\u003c\/td\u003e\n\u003ctd\u003e5.0 (for visual use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Reduction\u003c\/td\u003e\n\u003ctd\u003e99.999%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Color\u003c\/td\u003e\n\u003ctd\u003eNeutral White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003eEco: 140x155mm\u003cbr\u003eA4: 20x29cm (7.9\"x11.4\")\u003cbr\u003eRoll: 100x50cm (39.4\"x19.7\")\u003cbr\u003eMax: 117x117cm (46\"x46\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.02 (Eco size 140x155mm, 100x50cm (39.4\"x19.7\"))\u003cbr\u003e0.04 (A4 Sheet 20x29cm (7.9\"x11.4\"), 117x117cm (46\"x46\"))\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter \/ Clear Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003eca. 140 x 155 mm (Eco size 140x155mm)\u003cbr\u003eca. 20 x 29 cm (A4 Sheet 20x29cm (7.9\"x11.4\"))\u003cbr\u003eca. 100 x 50 cm (100x50cm (39.4\"x19.7\"))\u003cbr\u003eca. 117 x 117 cm (117x117cm (46\"x46\"))\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003eVisual solar observation and imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Wavelength\u003c\/td\u003e\n\u003ctd\u003eWhitelight (integral light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAstroSolar Film\u003c\/td\u003e\n\u003ctd\u003eAstroSolar Safety Film\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Filter with mount\/thread?\u003c\/td\u003e\n\u003ctd\u003eNo\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 AstroSolar Safety Film (Sheet of selected 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_AstroSolar_Filter_v1.7_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 AstroSolar Filter v1.7 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_Safe_Eclipse_Viewing_Camera_Obscura_Guide.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 Safe Eclipse Viewing Camera Obscura Guide\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_How_to_Make_a_Solar_Filter_for_Cameras_Binoculars_and_Telescopes.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 How to Make a Solar Filter for Cameras Binoculars and Telescopes\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_AstroSolar_Film_Usage_Instructions.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 AstroSolar Film Usage Instructions\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_How_to_Build_Your_Own_AstroSolar_Filter.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 How to Build Your Own AstroSolar Filter\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":"Eco size 140x155mm","offer_id":44967378354461,"sku":"BAA-2459286","price":24.0,"currency_code":"CAD","in_stock":true},{"title":"A4 Sheet 20x29cm (7.9\"x11.4\")","offer_id":44967378387229,"sku":"BAA-2459281","price":43.0,"currency_code":"CAD","in_stock":true},{"title":"100x50cm (39.4\"x19.7\")","offer_id":44967378419997,"sku":"BAA-2459282","price":132.0,"currency_code":"CAD","in_stock":true},{"title":"117x117cm (46\"x46\")","offer_id":44967378452765,"sku":"BAA-2459284","price":459.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Astrosolar-Safety-Film-OD-5-0-1__84410.1597111100.1280.1280.jpg?v=1684341429"},{"product_id":"baader-astrosolar-binocular-filter-od-5-0-50-100mm","title":"Baader AstroSolar Binocular Filter OD 5.0 - 50-100mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptical Density 5.0 AstroSolar Safety Film\u003c\/li\u003e\n\u003cli\u003eEnables direct, safe viewing of the Sun\u003c\/li\u003e\n\u003cli\u003eAvailable in 50mm, 60mm, 70mm, 80mm, and 100mm clear aperture models\u003c\/li\u003e\n\u003cli\u003eProduces a neutral-density, white-light image of the solar disk\u003c\/li\u003e\n\u003cli\u003eSecure, non-damaging fit for a wide range of binocular tube diameters\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 AstroSolar Binocular Filter OD 5.0 - 50-100mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader AstroSolar Binocular Filter provides Optical Density 5.0 protection, essential for safely observing the Sun with binoculars ranging from 50mm to 100mm in aperture. This rating ensures that 99.999% of sunlight is blocked before it enters your optics, allowing you to directly view sunspots, planetary transits, and solar eclipses without risk. Each filter size is engineered to securely grip a specific range of binocular tube outer diameters, accommodating instruments with tubes from 55mm up to 126mm.\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\u003eAstroSolar Film: OD 5.0 Safety for Direct Observation\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this filter is Baader's renowned AstroSolar Safety Film, which has set the standard for white-light solar observation. Unlike many glass filters that can degrade image sharpness, this streak-free and blister-free film provides optical quality that rivals high-end glass filters, but without the associated weight or cost. The OD 5.0 rating is certified for direct solar viewing, presenting the Sun in its true, neutral-white color and revealing fine details in sunspot umbrae and granulation on the solar surface.\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\u003eA Secure Fit for Binocular Tubes from 55mm to 126mm\u003c\/h3\u003e\n\u003cp\u003eDesigned specifically for binoculars, these filters feature a robust cell that ensures a secure, slip-free fit on your instrument's objective barrels. Each aperture size—from 50mm to 100mm—is built to accommodate a wide range of tube diameters, from 55mm up to 126mm depending on the model selected. This adjustable, non-marring grip provides peace of mind that the filter will not accidentally fall off during use, which is a critical safety requirement for any solar observation.\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 does OD 5.0 mean for the Baader AstroSolar Binocular Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eOptical Density (OD) 5.0\u003c\/strong\u003e means the filter reduces the intensity of sunlight by a factor of 100,000 (blocking 99.999% of the light). This is the internationally recognized standard for safe, direct visual observation of the Sun's photosphere. Anything less than OD 5.0 is unsafe for visual use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right size Baader AstroSolar filter for my binoculars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must measure the \u003cstrong\u003eouter diameter (OD)\u003c\/strong\u003e of the front of your binocular barrels, not the aperture of the lenses. Compare your measurement to the fit ranges provided for each filter size. For example, the 60mm filter fits tubes with an outer diameter of 65-80mm. Always choose the filter size where your measurement falls comfortably within its specified range for a secure fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see solar flares or prominences with the Baader AstroSolar Binocular Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This is a white-light filter designed for observing the Sun's surface (photosphere), including features like sunspots and granulation. Viewing solar flares and prominences requires a specialized, narrow-band Hydrogen-alpha (H-alpha) filter, which is a much more complex and expensive optical system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy one or two Baader AstroSolar filters for my binoculars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYou absolutely must buy two identical filters\u003c\/strong\u003e, one for each objective lens of your binoculars. Using a filter on only one side is extremely dangerous, as your unfiltered eye will still be exposed to the Sun's harmful, focused rays. This product is sold as a single unit, so you will need to add two to your cart.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat will the Sun look like through the Baader AstroSolar Binocular Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sun will appear as a sharp, detailed, and neutral-white disk against a black sky. You will be able to clearly see sunspot groups, distinguishing between the darker central umbra and the lighter surrounding penumbra. During periods of good atmospheric seeing, you may also resolve the texture of solar granulation across the surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader AstroSolar filter film ever need to be replaced?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the film should be inspected for scratches, pinholes, or damage before every use. If you find any defect that allows concentrated light to pass through, you must discard the filter immediately. With proper care and storage, the film can last for many years, but it is not permanent and its integrity is crucial for your safety.\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\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003e5.0 (99.999% light reduction)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Clear Apertures\u003c\/td\u003e\n\u003ctd\u003e50mm, 60mm, 70mm, 80mm, 100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Image Color\u003c\/td\u003e\n\u003ctd\u003eNeutral White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilm Type\u003c\/td\u003e\n\u003ctd\u003eAstroSolar Safety Film\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.07 (50mm, 60mm, 70mm)\u003cbr\u003e0.08 (80mm)\u003cbr\u003e0.09 (100mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e110 (50mm)\u003cbr\u003e120 (60mm)\u003cbr\u003e130 (70mm)\u003cbr\u003e140 (80mm)\u003cbr\u003e160 (100mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003eVisual solar observation and imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Wavelength\u003c\/td\u003e\n\u003ctd\u003eWhitelight (integral light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Filter with mount\/thread?\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (13mm bolts)\u003c\/td\u003e\n\u003ctd\u003e55 – 70 (50mm)\u003cbr\u003e65 – 80 (60mm)\u003cbr\u003e75 – 90 (70mm)\u003cbr\u003e85 – 100 (80mm)\u003cbr\u003e105 – 120 (100mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (13mm bolts)\u003c\/td\u003e\n\u003ctd\u003e81 – 96 (50mm)\u003cbr\u003e91 – 106 (60mm)\u003cbr\u003e101 – 116 (70mm)\u003cbr\u003e111 – 126 (80mm)\u003cbr\u003e131 – 146 (100mm)\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_AstroSolar_Filter_v1.7_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 AstroSolar Filter v1.7 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_Safe_Eclipse_Viewing_Camera_Obscura_Guide.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 Safe Eclipse Viewing Camera Obscura Guide\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":"50mm","offer_id":44967378747677,"sku":"BAA-2459325","price":67.0,"currency_code":"CAD","in_stock":true},{"title":"60mm","offer_id":44967378780445,"sku":"BAA-2459326","price":79.0,"currency_code":"CAD","in_stock":true},{"title":"70mm","offer_id":44967378813213,"sku":"BAA-2459327","price":86.0,"currency_code":"CAD","in_stock":true},{"title":"80mm","offer_id":44967378845981,"sku":"BAA-2459328","price":97.0,"currency_code":"CAD","in_stock":true},{"title":"100mm","offer_id":44967378878749,"sku":"BAA-2459329","price":117.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-AstroSolar-Binocular-Filter-OD-5-0-50-100mm-2__80285.1597111102.1280.1280.jpg?v=1684341687"},{"product_id":"baader-astrosolar-spotting-scope-filter-od-5-0-50-150mm","title":"Baader AstroSolar Spotting Scope Filter OD 5.0 - 50-150mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptical Density 5.0 for safe, direct solar viewing\u003c\/li\u003e\n\u003cli\u003eAvailable in 7 sizes from 50mm to 150mm\u003c\/li\u003e\n\u003cli\u003eFits spotting scopes, binoculars, and small telescopes\u003c\/li\u003e\n\u003cli\u003eStress-free AstroSolar film provides sharp, high-contrast images\u003c\/li\u003e\n\u003cli\u003eAdjustable centering bolts ensure a secure, centered fit\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 AstroSolar Spotting Scope Filter OD 5.0 - 50-150mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader AstroSolar Spotting Scope Filter transforms your daytime optics into a dedicated solar instrument, using Baader's renowned AstroSolar film to provide certified Optical Density 5.0 protection. Available in seven sizes to fit optical tubes from 50mm to 150mm in aperture, this filter delivers neutral white-light views of the Sun, revealing sunspots, surface granulation, and solar eclipses with exceptional clarity. The filter's design prioritizes safety and a secure fit, allowing you to observe the Sun with complete confidence.\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\u003eAstroSolar Film: Certified OD 5.0 Protection for Your Eyes\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this filter is Baader's AstroSolar safety film, which achieves an optical density of 5.0, blocking 99.999% of incoming sunlight before it enters your optics. This level of attenuation is essential for direct, visual observation of the solar photosphere. Unlike many glass filters that produce a color-cast, AstroSolar film provides a neutral, white-light image, rendering sunspots and granulation in their true, high-contrast form.\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\u003eAdjustable Mounting: A Secure Fit for Tubes from 55mm to 218mm\u003c\/h3\u003e\n\u003cp\u003eA solar filter is only safe if it's securely attached. The Baader AstroSolar Spotting Scope Filter includes three adjustable centering bolts that grip the outer or inner diameter of your instrument's front cell for a firm, centered fit. This versatile system allows each of the seven filter sizes (50mm to 150mm) to accommodate a wide range of tube diameters, ensuring a custom fit for your specific spotting scope, binocular, or small telescope. For added security, safety straps are included to prevent the filter from being accidentally dislodged.\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\"\u003eHow do I choose the correct size Baader AstroSolar Spotting Scope Filter for my instrument?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must measure the \u003cstrong\u003eouter diameter (OD)\u003c\/strong\u003e of the front of your telescope or spotting scope tube. Each Baader AstroSolar filter size (e.g., 80mm, 100mm) is designed to fit a specific range of tube diameters. Match your measurement to the corresponding filter size to ensure a secure fit with the included centering bolts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the OD 5.0 Baader AstroSolar filter safe for direct viewing of the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, absolutely.\u003c\/strong\u003e An Optical Density (OD) of 5.0 is the international standard for safe, direct visual observation of the Sun. It blocks 99.999% of the Sun's energy, including harmful UV and IR radiation, reducing the intense light to a comfortable level for your eyes when placed over the front of your optics. Never observe the Sun without a properly fitted, certified solar filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I see on the Sun with the Baader AstroSolar Spotting Scope Filter and my 80mm spotting scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an 80mm spotting scope, the Baader AstroSolar Filter will clearly show you the dynamic surface of the Sun in white light. You can expect to see:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunspots:\u003c\/strong\u003e Dark, complex regions on the solar surface, often appearing in groups. You can track their movement from day to day as the Sun rotates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaculae:\u003c\/strong\u003e Bright, blotchy areas that are often visible near the solar limb (edge).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGranulation:\u003c\/strong\u003e With steady seeing conditions, you may be able to resolve the mottled, rice-grain-like pattern of the solar surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Eclipses:\u003c\/strong\u003e The filter is perfect for safely watching all phases of a solar eclipse.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Baader AstroSolar filter for photography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis OD 5.0 filter is primarily designed for visual use. While you can take afocal images (holding a camera to the eyepiece), the dim view requires longer exposures, which can be challenging for high-magnification planetary cameras. For dedicated high-resolution solar imaging, Baader offers a separate, brighter AstroSolar Photo Film (OD 3.8) which allows for much shorter exposure times.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Baader AstroSolar Spotting Scope Filter securely?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward. The filter comes with three centering bolts that you position to grip your scope's tube. You adjust them for a snug, centered fit. For maximum safety, especially during public outreach or in windy conditions, you should also use the included safety straps to create a secondary attachment point, ensuring the filter cannot be knocked off accidentally.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader AstroSolar Filter to watch a solar eclipse or the transit of Mercury?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Baader AstroSolar Spotting Scope Filter is ideal for observing these celestial events. It provides a safe and detailed view of the Moon's silhouette moving across the Sun during an eclipse, or the tiny, sharp disk of Mercury or Venus during a transit. It allows you to safely watch all partial phases of an eclipse from start to finish.\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\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eWhite-Light Solar Film\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Aperture Sizes\u003c\/td\u003e\n\u003ctd\u003e50mm, 65mm, 80mm, 100mm, 115mm, 130mm, 150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.07 (50mm, 100mm)\u003cbr\u003e0.08 (65mm)\u003cbr\u003e0.06 (80mm)\u003cbr\u003e0.10 (115mm)\u003cbr\u003e0.15 (130mm)\u003cbr\u003e0.16 (150mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e110 (50mm)\u003cbr\u003e125 (65mm)\u003cbr\u003e140 (80mm)\u003cbr\u003e160 (100mm)\u003cbr\u003e175 (115mm)\u003cbr\u003e210 (130mm)\u003cbr\u003e230 (150mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003eVisual solar observation and imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Wavelength\u003c\/td\u003e\n\u003ctd\u003eWhitelight (integral light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAstroSolar Film\u003c\/td\u003e\n\u003ctd\u003eAstroSolar Safety Film\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Filter with mount\/thread?\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (13mm bolts)\u003c\/td\u003e\n\u003ctd\u003e55 – 70 (50mm)\u003cbr\u003e70 – 85 (65mm)\u003cbr\u003e85 – 100 (80mm)\u003cbr\u003e105 – 120 (100mm)\u003cbr\u003e120 – 135 (115mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (13mm bolts)\u003c\/td\u003e\n\u003ctd\u003e81 – 96 (50mm)\u003cbr\u003e96 – 111 (65mm)\u003cbr\u003e111 – 126 (80mm)\u003cbr\u003e131 – 146 (100mm)\u003cbr\u003e146 – 161 (115mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (10mm bolts)\u003c\/td\u003e\n\u003ctd\u003e148 – 178 (130mm)\u003cbr\u003e168 – 198 (150mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (10mm bolts)\u003c\/td\u003e\n\u003ctd\u003e168 – 198 (130mm)\u003cbr\u003e188 – 218 (150mm)\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_AstroSolar_Filter_v1.7_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 AstroSolar Filter v1.7 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_Safe_Eclipse_Viewing_Camera_Obscura_Guide.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 Safe Eclipse Viewing Camera Obscura Guide\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":"50mm","offer_id":44967379173661,"sku":"BAA-2459335","price":69.0,"currency_code":"CAD","in_stock":true},{"title":"65mm","offer_id":44967379206429,"sku":"BAA-2459336","price":82.0,"currency_code":"CAD","in_stock":true},{"title":"80mm","offer_id":44967379239197,"sku":"BAA-2459337","price":97.0,"currency_code":"CAD","in_stock":true},{"title":"100mm","offer_id":44967379271965,"sku":"BAA-2459338","price":118.0,"currency_code":"CAD","in_stock":true},{"title":"115mm","offer_id":44967379304733,"sku":"BAA-2459339","price":127.0,"currency_code":"CAD","in_stock":true},{"title":"130mm","offer_id":44967379337501,"sku":"BAA-2459340","price":149.0,"currency_code":"CAD","in_stock":true},{"title":"150mm","offer_id":44967379370269,"sku":"BAA-2459341","price":175.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-AstroSolar-Spotting-Scope-Filter-OD-5-0-50-150mm-2__24030.1597111104.1280.1280.jpg?v=1684341693"},{"product_id":"baader-astrosolar-telescope-filter-od-5-0-80-280mm","title":"Baader AstroSolar Telescope Filter OD 5.0 - 80-280mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables safe, high-resolution solar viewing and imaging\u003c\/li\u003e\n\u003cli\u003eOptical Density 5.0, blocking 99.999% of sunlight\u003c\/li\u003e\n\u003cli\u003eAvailable in apertures from 80mm to 280mm\u003c\/li\u003e\n\u003cli\u003eTemperature-compensated cell ensures optical quality from -30°C to +50°C\u003c\/li\u003e\n\u003cli\u003eStress-free film mounting preserves diffraction-limited resolution\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 AstroSolar Telescope Filter OD 5.0 - 80-280mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader AstroSolar Telescope Filter delivers diffraction-limited solar views by mounting genuine AstroSolar Safety Film (OD 5.0) in a cell engineered to eliminate mechanical stress. Available in sizes from 80mm to 280mm, this filter maintains its optical figure across a wide temperature range, from -30°C to +50°C. Each filter includes two sets of adjustable centering pins (10mm and 20mm diameter) and three safety straps, ensuring a secure fit to your telescope's tube or dew shield for uncompromising safety and image sharpness.\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\u003eDiffraction-Limited Views: The Stress-Free OD 5.0 AstroSolar Film Cell\u003c\/h3\u003e\n\u003cp\u003eUnlike DIY or improperly mounted filters that stretch the film taut like a drumhead, Baader's ASTF filters mount the OD 5.0 AstroSolar film with zero tension. This proprietary, temperature-compensated cell allows the film to \"float,\" preserving its sub-micron surface accuracy and acting as a high-precision optical window. The result is the ability to resolve fine solar details like granulation and sunspot penumbrae, which are often blurred into mush by the microscopic distortions induced by a stretched film.\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\u003eUniversal Mounting with 10mm \u0026amp; 20mm Centering Pins\u003c\/h3\u003e\n\u003cp\u003eEach ASTF filter ensures a secure, centered fit on a wide range of telescope tubes and dew shields. The package includes two sets of 38mm long centering pins—three with a 10mm diameter and three with a 20mm diameter—that slide into the filter's aluminum frame. This adjustable system, combined with the included safety straps, provides a reliable, non-slip attachment to your instrument, preventing accidental dislodging during observation.\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 ASTF vs. DIY Filters: Why Wrinkles Equal Sharpness\u003c\/h3\u003e\n\u003cp\u003eA common misconception is that solar film should look perfectly flat like a glass filter. In reality, the slight waves and wrinkles visible in the AstroSolar film are proof that it is mounted correctly and free from tension. When film is stretched to look flat, it introduces astigmatism and other aberrations that degrade the image at the focal plane. The Baader ASTF filter cell is purpose-built to maintain this crucial, stress-free state, delivering image quality that stretched, DIY filters cannot match at high magnification.\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\"\u003eIs the Baader AstroSolar OD 5.0 filter safe for looking at the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolutely.\u003c\/strong\u003e The \"OD 5.0\" designation means the filter has an Optical Density of 5.0, which blocks 99.999% of all sunlight, including harmful UV and IR radiation. This makes it completely safe for direct visual observation and photography, provided it is mounted securely to the front of your telescope and is free of any pinholes or damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the film on my Baader AstroSolar filter look wrinkled?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe wrinkles are a sign that the filter is working correctly. Baader's design intentionally mounts the AstroSolar film without any tension. This stress-free state is essential to preserve the film's diffraction-limited optical quality. Stretching the film to make it look flat would introduce distortions and ruin high-magnification views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right size Baader AstroSolar filter for my 8-inch SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need to measure the outer diameter (OD) of your telescope's front cell or dew shield. For an 8\" SCT, this is typically around 9.25\" or 235mm. You would select the Baader ASTF 240mm filter, which is designed for tube ODs from 260-300mm. Always choose the filter size that allows the centering pins to grip the outside of your telescope tube securely. Refer to the specific fitment range for each filter size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader AstroSolar OD 5.0 filter for photography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the OD 5.0 AstroSolar filter is excellent for both visual observation and high-resolution solar photography (white-light). It allows for short exposure times necessary to \"freeze\" atmospheric seeing, making it ideal for capturing sunspots, faculae, and solar granulation with a planetary camera or DSLR.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between this Baader filter and a cheaper glass solar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBaader's AstroSolar film provides superior optical quality to most affordable glass filters. The film is manufactured to diffraction-limited standards, while many glass filters use lower-grade \"plate glass\" that can soften fine details. The Baader ASTF filter consistently delivers sharper, higher-contrast images of the Sun's surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Baader filter show granulation on my 100mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, under conditions of good atmospheric seeing, a 100mm refractor equipped with a Baader AstroSolar filter is more than capable of resolving the Sun's granulation pattern. The filter's high optical quality will not be the limiting factor; the sharpness will be determined by the stability of the air and the quality of your telescope's optics.\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\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003eOD 5.0 (99.999% light reduction)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Apertures\u003c\/td\u003e\n\u003ctd\u003e80mm, 100mm, 120mm, 140mm, 160mm, 180mm, 200mm, 240mm, 280mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilm Material\u003c\/td\u003e\n\u003ctd\u003eBaader AstroSolar Safety Film\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eTemperature-compensated, stress-free cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30°C to +50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Pins\u003c\/td\u003e\n\u003ctd\u003e3x 10mm diameter, 3x 20mm diameter (38mm length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.12 (80mm)\u003cbr\u003e0.16 (100mm)\u003cbr\u003e0.17 (120mm)\u003cbr\u003e0.20 (140mm)\u003cbr\u003e0.22 (160mm)\u003cbr\u003e0.23 (180mm, 200mm)\u003cbr\u003e0.28 (240mm)\u003cbr\u003e0.33 (280mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e170 (80mm)\u003cbr\u003e190 (100mm)\u003cbr\u003e210 (120mm)\u003cbr\u003e230 (140mm)\u003cbr\u003e250 (160mm)\u003cbr\u003e270 (180mm)\u003cbr\u003e290 (200mm)\u003cbr\u003e330 (240mm)\u003cbr\u003e370 (280mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003eVisual solar observation and imaging at high magnification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Wavelength\u003c\/td\u003e\n\u003ctd\u003eWhitelight (integral light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Filter with mount\/thread?\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (10mm bolts)\u003c\/td\u003e\n\u003ctd\u003e110 – 140 (80mm)\u003cbr\u003e130 – 160 (100mm)\u003cbr\u003e150 – 180 (120mm)\u003cbr\u003e170 – 200 (140mm)\u003cbr\u003e190 – 220 (160mm)\u003cbr\u003e210 – 240 (180mm)\u003cbr\u003e230 – 260 (200mm)\u003cbr\u003e270 – 300 (240mm)\u003cbr\u003e310 – 340 (280mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (10mm bolts)\u003c\/td\u003e\n\u003ctd\u003e130 – 160 (80mm)\u003cbr\u003e150 – 180 (100mm)\u003cbr\u003e170 – 200 (120mm)\u003cbr\u003e190 – 220 (140mm)\u003cbr\u003e210 – 240 (160mm)\u003cbr\u003e230 – 260 (180mm)\u003cbr\u003e250 – 280 (200mm)\u003cbr\u003e290 – 320 (240mm)\u003cbr\u003e330 – 360 (280mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (20mm bolts)\u003c\/td\u003e\n\u003ctd\u003e100 – 130 (80mm)\u003cbr\u003e120 – 150 (100mm)\u003cbr\u003e140 – 170 (120mm)\u003cbr\u003e160 – 190 (140mm)\u003cbr\u003e180 – 210 (160mm)\u003cbr\u003e200 – 230 (180mm)\u003cbr\u003e220 – 250 (200mm)\u003cbr\u003e260 – 290 (240mm)\u003cbr\u003e300 – 330 (280mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (20mm bolts)\u003c\/td\u003e\n\u003ctd\u003e140 – 170 (80mm)\u003cbr\u003e160 – 190 (100mm)\u003cbr\u003e180 – 210 (120mm)\u003cbr\u003e200 – 230 (140mm)\u003cbr\u003e220 – 250 (160mm)\u003cbr\u003e240 – 270 (180mm)\u003cbr\u003e260 – 290 (200mm)\u003cbr\u003e300 – 330 (240mm)\u003cbr\u003e340 – 370 (280mm)\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\"\u003eASTF Solar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCentering Pins (10mm dia, 38mm length)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCentering Pins (20mm dia, 38mm length)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSafety Straps with Self-Adhesive Pads\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRubber Plugs for Unused Holes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInstruction Manual\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_Safe_Eclipse_Viewing_Camera_Obscura_Guide.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 Safe Eclipse Viewing Camera Obscura Guide\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_AstroSolar_Filter_v1.7_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 AstroSolar Filter v1.7 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":"80mm","offer_id":44967379599645,"sku":"BAA-2459310","price":129.0,"currency_code":"CAD","in_stock":true},{"title":"100mm","offer_id":44967379632413,"sku":"BAA-2459311","price":149.0,"currency_code":"CAD","in_stock":true},{"title":"120mm","offer_id":44967379665181,"sku":"BAA-2459312","price":172.0,"currency_code":"CAD","in_stock":true},{"title":"140mm","offer_id":44967379697949,"sku":"BAA-2459313","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"160mm","offer_id":44967379730717,"sku":"BAA-2459314","price":209.0,"currency_code":"CAD","in_stock":true},{"title":"180mm","offer_id":44967379763485,"sku":"BAA-2459315","price":233.0,"currency_code":"CAD","in_stock":true},{"title":"200mm","offer_id":44967379796253,"sku":"BAA-2459316","price":257.0,"currency_code":"CAD","in_stock":true},{"title":"240mm","offer_id":44967379829021,"sku":"BAA-2459317","price":293.0,"currency_code":"CAD","in_stock":true},{"title":"280mm","offer_id":44967379861789,"sku":"BAA-2459318","price":314.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-AstroSolar-Telescope-Filter-OD-5-0-80-280mm-2__19144.1597111106.1280.1280.jpg?v=1684341469"},{"product_id":"baader-digital-solar-filter-3-8-od-80-280mm","title":"Baader Digital Solar Filter 3.8 OD - 80-280mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptical Density 3.8 for ultra-short photographic exposures\u003c\/li\u003e\n\u003cli\u003eAvailable in sizes from 80mm to 280mm\u003c\/li\u003e\n\u003cli\u003eTension-free film mounting for diffraction-limited imaging\u003c\/li\u003e\n\u003cli\u003eTemperature-compensated cell maintains optical quality from -30°C to +50°C\u003c\/li\u003e\n\u003cli\u003eAdjustable centering pins for a secure, customized fit\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFOR PHOTOGRAPHIC\/IMAGING USE ONLY — NOT SAFE FOR VISUAL OBSERVATION\u003c\/strong\u003e\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 Digital Solar Filter OD 3.8 - 80-280mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader Digital Solar Filter provides an Optical Density of 3.8 across a range of sizes from 80mm to 280mm, engineered specifically for high-frame-rate solar imaging. Its unique temperature-compensated cell maintains diffraction-limited optical quality from -30°C to +50°C, allowing you to capture sharp solar details without thermal drift. \u003cstrong\u003eThis filter is designed exclusively for photographic and digital imaging; it is NOT safe for direct visual observation of the Sun under any circumstances.\u003c\/strong\u003e\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\u003eOptical Density 3.8: Engineered for High-Speed Solar Imaging\u003c\/h3\u003e\n\u003cp\u003eThe core of this filter is Baader's AstroSolar FOTO Film, which has an optical density (OD) of 3.8. This transmits more light than visually-safe OD 5.0 films, enabling extremely short exposure times. For solar imagers using digital video or lucky imaging techniques, this is a critical advantage for \"freezing\" the atmospheric turbulence and capturing moments of perfect seeing, revealing fine granulation and sunspot details that would otherwise be blurred.\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\u003eTemperature-Compensated Cell: Maintaining Optical Flatness from -30°C to +50°C\u003c\/h3\u003e\n\u003cp\u003eTo perform like a high-precision optical window, AstroSolar film must be mounted completely free of tension. The Baader Digital Solar Filter achieves this with a sophisticated, temperature-compensating cell. The film is bonded to an injection-molded ring that shares its thermal expansion coefficient, and this entire assembly \"floats\" within the main aluminum frame. This design ensures the film remains optically flat and stress-free across a -30°C to +50°C temperature range, preventing image degradation caused by thermal contraction or expansion.\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\u003eSecure 3-Point Mounting System with Adjustable Pins \u0026amp; Safety Straps\u003c\/h3\u003e\n\u003cp\u003eA solar filter's security is paramount. This filter includes a versatile mounting system to ensure a safe and stable fit on your telescope's tube or dew shield. Included are two sets of 38mm long centering pins (three 10mm diameter, three 20mm diameter) that can be adjusted for a precise fit. For total security against accidental dislodging by wind or bumps, three safety straps with self-adhesive pads are also provided to firmly anchor the filter to your telescope.\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 OD 3.8 vs. OD 5.0 Film: An Imaging-First Design\u003c\/h3\u003e\n\u003cp\u003eChoosing the right solar filter depends entirely on your intended use. The primary trade-off is between speed and visual safety.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader OD 5.0 Film:\u003c\/strong\u003e This is the standard for both visual observation and imaging. It is dense enough to reduce the Sun's light to a safe level for direct viewing and works well for single-shot imaging, though it requires longer exposure times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader OD 3.8 Digital Film (This Product):\u003c\/strong\u003e This film is for imaging only. Its lower density allows for the extremely fast shutter speeds needed for high-frame-rate video astronomy. This speed is its sole advantage, and it comes at the cost of being completely unsafe for your eyes.\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\"\u003eIs the Baader Digital Solar Filter OD 3.8 safe for looking at the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNO, ABSOLUTELY NOT.\u003c\/strong\u003e This filter is designed for cameras only. It transmits far too much light (UV and IR included) for the human eye to handle safely. Attempting to view the Sun through this filter will cause immediate and permanent eye damage, including blindness. For visual observation, you must use a filter rated at Optical Density 5.0 or higher.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the film on my Baader Digital Solar Filter look wavy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slight waves are intentional and a sign of a properly mounted filter. To deliver the highest quality images, the AstroSolar film must be held without any surface tension, allowing it to function like a perfect optical window. Stretching the film tight like a drumhead, as seen in some other filters, introduces stress that will severely degrade image sharpness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader OD 3.8 filter help image the Sun's granulation on a turbulent day?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAtmospheric turbulence (seeing) blurs fine solar details. The OD 3.8 film allows your camera to use extremely short exposure times (fractions of a millisecond). By capturing video at hundreds of frames per second, you can catch fleeting moments when the air is steady. Stacking the best of these \"lucky\" frames reveals sharp, high-contrast details of solar granulation and sunspot umbra that are invisible in longer exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main difference between Baader's OD 3.8 and OD 5.0 solar filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the use case:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOD 5.0:\u003c\/strong\u003e Safe for both visual observation and general imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOD 3.8 (This Filter):\u003c\/strong\u003e For imaging\/photography ONLY. It allows for much shorter exposure times, which is critical for high-resolution lucky imaging, but it is completely unsafe for visual use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I securely attach the Baader Digital Solar Filter to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter uses a robust three-point system. First, you select the appropriate diameter centering pins from the two included sets and position them to grip the inside or outside of your telescope tube or dew shield. For maximum safety, you then use the three included safety straps to anchor the filter cell to the body of your telescope, preventing it from being accidentally knocked off or blown away by wind.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader OD 3.8 filter with my 8-inch SCT for video astronomy of sunspots?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application. An 8-inch SCT provides high resolution, and the OD 3.8 filter allows the fast shutter speeds necessary to counteract atmospheric instability. This combination is excellent for capturing high-frame-rate video of sunspots, allowing you to resolve fine details in the penumbra and umbra through lucky imaging software.\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\u003eIntended Use\u003c\/td\u003e\n\u003ctd\u003ePhotographic \/ Digital Imaging Only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisual Safety\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eNOT SAFE for Visual Observation\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003e3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Apertures\u003c\/td\u003e\n\u003ctd\u003e80mm, 100mm, 120mm, 140mm, 160mm, 180mm, 200mm, 240mm, 280mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Design\u003c\/td\u003e\n\u003ctd\u003eTension-Free, Temperature-Compensated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30°C to +50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentering Pin Length\u003c\/td\u003e\n\u003ctd\u003e38mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentering Pin Diameters\u003c\/td\u003e\n\u003ctd\u003e10mm and 20mm (3 of each included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.18 (80mm)\u003cbr\u003e0.15 (100mm)\u003cbr\u003e0.21 (120mm)\u003cbr\u003e0.23 (140mm, 180mm)\u003cbr\u003e0.25 (160mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e170 (80mm)\u003cbr\u003e190 (100mm)\u003cbr\u003e210 (120mm)\u003cbr\u003e230 (140mm)\u003cbr\u003e250 (160mm)\u003cbr\u003e270 (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Wavelength\u003c\/td\u003e\n\u003ctd\u003eWhitelight (integral light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAstroSolar Film\u003c\/td\u003e\n\u003ctd\u003eAstroSolar Photo Film\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Filter with mount\/thread?\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (10mm bolts)\u003c\/td\u003e\n\u003ctd\u003e110 – 140 (80mm)\u003cbr\u003e130 – 160 (100mm)\u003cbr\u003e150 – 180 (120mm)\u003cbr\u003e170 – 200 (140mm)\u003cbr\u003e190 – 220 (160mm)\u003cbr\u003e210 – 240 (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (10mm bolts)\u003c\/td\u003e\n\u003ctd\u003e130 – 160 (80mm)\u003cbr\u003e150 – 180 (100mm)\u003cbr\u003e170 – 200 (120mm)\u003cbr\u003e190 – 220 (140mm)\u003cbr\u003e210 – 240 (160mm)\u003cbr\u003e230 – 260 (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Clampingrange (20mm bolts)\u003c\/td\u003e\n\u003ctd\u003e100 – 130 (80mm)\u003cbr\u003e120 – 150 (100mm)\u003cbr\u003e140 – 170 (120mm)\u003cbr\u003e160 – 190 (140mm)\u003cbr\u003e180 – 210 (160mm)\u003cbr\u003e200 – 230 (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Clampingrange (20mm bolts)\u003c\/td\u003e\n\u003ctd\u003e140 – 170 (80mm)\u003cbr\u003e160 – 190 (100mm)\u003cbr\u003e180 – 210 (120mm)\u003cbr\u003e200 – 230 (140mm)\u003cbr\u003e220 – 250 (160mm)\u003cbr\u003e240 – 270 (180mm)\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 Digital Solar Filter (ASTF\/BDSF)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCentering Pins (10mm dia, 38mm length)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCentering Pins (20mm dia, 38mm length)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSafety Straps with Adhesive Pads\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRubber Plugs for unused holes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Instructions\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_AstroSolar_Filter_v1.7_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 AstroSolar Filter v1.7 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 Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"80mm","offer_id":44967379960093,"sku":"BAA-2459370","price":162.0,"currency_code":"CAD","in_stock":true},{"title":"100mm","offer_id":44967379992861,"sku":"BAA-2459371","price":184.0,"currency_code":"CAD","in_stock":true},{"title":"120mm","offer_id":44967380025629,"sku":"BAA-2459372","price":213.0,"currency_code":"CAD","in_stock":true},{"title":"140mm","offer_id":44967380058397,"sku":"BAA-2459373","price":235.0,"currency_code":"CAD","in_stock":true},{"title":"160mm","offer_id":44967380091165,"sku":"BAA-2459374","price":260.0,"currency_code":"CAD","in_stock":true},{"title":"180mm","offer_id":44967380123933,"sku":"BAA-2459375","price":292.0,"currency_code":"CAD","in_stock":true},{"title":"200mm","offer_id":44967380156701,"sku":"BAA-2459376","price":238.0,"currency_code":"CAD","in_stock":true},{"title":"240mm","offer_id":44967380189469,"sku":"BAA-2459377","price":270.0,"currency_code":"CAD","in_stock":true},{"title":"280mm","offer_id":44967380222237,"sku":"BAA-2459378","price":309.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Digital-Solar-Filter-3-8-OD-80-280mm-1__08779.1597111107.1280.1280.jpg?v=1684341472"},{"product_id":"baader-k-line-double-stacked-filter-1-25","title":"Baader Calcium GEN-II Filter - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCalcium GEN-II Solar Filter\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Size\u003c\/li\u003e\n\u003cli\u003eReveals Chromospheric Detail\u003c\/li\u003e\n\u003cli\u003eCamera-Use Only (Not for Visual)\u003c\/li\u003e\n\u003cli\u003eRequires Full-Aperture Pre-Filter\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 Calcium GEN-II Filter - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Baader Calcium GEN-II Filter replaces the legacy double-stacked K-Line model, delivering a narrower bandpass for high-contrast solar imaging in a single 1.25\" housing. Designed for camera-only use in any standard 1.25\" filter wheel or nosepiece, this filter targets the near-UV emission line of calcium to reveal dynamic chromospheric structures invisible in white light.\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\u003eRevealing the Sun's Chromosphere in the Near-UV\u003c\/h3\u003e\n\u003cp\u003eThis filter isolates the light from ionized calcium, providing a view of the turbulent border region between the sun's visible surface (photosphere) and its upper atmosphere (chromosphere). This allows your monochrome camera to capture details like the chromospheric network across the entire solar disk, the granular patterns of supergranulation, and the brief, intense brightenings known as Ellerman Bombs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis filter is for photographic use only.\u003c\/strong\u003e The near-UV wavelengths it transmits are invisible to the human eye, which cannot trigger a blink reflex to protect itself. Attempting to view the sun visually with this filter, even with a pre-filter, can result in permanent eye damage.\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 GEN-II Redesign: A Narrower Bandpass in a Single Filter\u003c\/h3\u003e\n\u003cp\u003eThis GEN-II filter makes the previous double-stacked K-Line model obsolete. Thanks to modern manufacturing techniques, a single filter now achieves a narrower half-band width (FWHM), significantly enhancing contrast compared to the older design. This improved contrast is specifically matched to the quantum efficiency and signal-to-noise ratio of modern CMOS cameras.\u003c\/p\u003e\n\u003cp\u003eThe redesign also results in a more practical physical form. Housed in a single, low-profile mount, the filter easily fits into standard filter wheels and drawers without the clearance issues or added complexity of stacking two separate filters.\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\u003eCamera Integration and Critical Solar Safety Protocols\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e The Calcium GEN-II filter must be used with a separate, full-aperture solar filter, such as Baader's AstroSolar Photo Film, mounted on the front of the telescope. Never point a telescope at the sun with only this filter in the optical path. It does not provide sufficient energy rejection on its own and is designed to be used as part of a complete, safe solar imaging system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Telescope Choice:\u003c\/strong\u003e For the sharpest results, this filter is best paired with mirror-based telescopes like Schmidt-Cassegrains, Maksutovs, or Newtonians. Refractor telescopes, particularly those with fast focal ratios, are often not color-corrected for the near-UV spectrum and may produce softer images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Cameras:\u003c\/strong\u003e A monochrome camera is strongly recommended, as these sensors have much higher sensitivity in the near-UV than color cameras or unmodified DSLRs. Using a color camera may require impractically long exposure times and yield lower-contrast results.\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\"\u003eWhat solar features can I see with the Baader Calcium GEN-II filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader Calcium GEN-II filter is designed for imaging the sun's chromosphere. It excels at revealing the \u003cstrong\u003echromospheric network\u003c\/strong\u003e (bright outlines of supergranule cells), faculae near the solar limb, and transient events like \u003cstrong\u003eEllerman Bombs\u003c\/strong\u003e. It shows a different, more active layer of the sun than a standard white-light filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy can't I use the Baader Calcium GEN-II filter for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must \u003cstrong\u003enever use this filter for visual observation\u003c\/strong\u003e. It transmits light in the near-ultraviolet part of the spectrum, which is invisible to the human eye. Your eye will not register the light as bright and will not trigger a protective blink reflex, but the energy can still cause severe and permanent damage to your retina.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need any other filters to use the Baader Calcium GEN-II filter safely?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, absolutely.\u003c\/strong\u003e This filter is not a standalone solar filter. You must use it in combination with a full-aperture, objective-mounted solar filter like \u003cstrong\u003eBaader AstroSolar Film\u003c\/strong\u003e. The front-mounted filter reduces the sun's energy to a safe level before it enters the telescope. The Calcium GEN-II filter then isolates the specific wavelength for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader Calcium GEN-II filter work well with my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, an 8\" f\/10 Schmidt-Cassegrain is an excellent instrument for the Baader Calcium GEN-II filter. As a mirror-based telescope, it does not suffer from the potential chromatic aberration in the near-UV that can affect some refractors. The long focal length will also provide a good image scale for capturing chromospheric details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a color CMOS camera. Can I still use the Baader Calcium GEN-II filter to image sunspots?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile you can image sunspots, which are primarily a white-light (photosphere) phenomenon, this filter is designed for chromospheric features. A color camera can be used, but it's not ideal. The Bayer matrix on a color sensor blocks a significant portion of the near-UV light this filter transmits, and the sensor itself has lower sensitivity at this wavelength. You will get much better results with a \u003cstrong\u003emonochrome camera\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the new Baader Calcium GEN-II filter different from the older 'double stacked' K-Line filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader Calcium GEN-II filter is a complete replacement for the older system. Key differences include:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Filter Design:\u003c\/strong\u003e It achieves a narrower bandpass and better contrast in one filter, making stacking unnecessary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e Modern coating technology allows for a tighter bandpass, which improves the visibility of fine chromospheric details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Profile Housing:\u003c\/strong\u003e It fits easily into any standard 1.25\" filter wheel or drawer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter size\u003c\/td\u003e\n\u003ctd\u003e1.25 inch\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\u003eSolar\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\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eonly for photographic use behind another solar filter\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\u003eHBW (Halfbandwidth)\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e394 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003eCaK-II\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\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":"Default Title","offer_id":44967380451613,"sku":"BAA-2961590","price":415.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BAA-2961590.jpg?v=1732743371"},{"product_id":"baader-d-erf-energy-rejection-filter-75-180mm","title":"Baader D-ERF Energy Rejection Filter - 75-180mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFull-aperture solar energy rejection filter\u003c\/li\u003e\n\u003cli\u003eRequired for use with rear-mounted H-alpha etalon systems\u003c\/li\u003e\n\u003cli\u003eAdvanced, hard dielectric IR-cut coatings\u003c\/li\u003e\n\u003cli\u003eProtects sensitive etalon components from thermal damage\u003c\/li\u003e\n\u003cli\u003eAvailable in sizes from 75mm to 180mm\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 D-ERF Energy Rejection Filter - 75mm to 180mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader D-ERF Energy Rejection Filter is the essential first component for any H-alpha solar imaging system using a rear-mounted etalon, available in sizes from 75mm to 180mm. This front-mounted filter blocks the vast majority of the sun's unwanted energy, particularly infrared, before it can enter your telescope. By preventing this intense heat from reaching your expensive and delicate H-alpha etalon, the D-ERF ensures stable performance and protects your investment from permanent damage.\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\u003eCritical Pre-Filtering for H-alpha Systems up to 180mm\u003c\/h3\u003e\n\u003cp\u003eUnlike an integrated solar telescope, a system built around a rear-mounted etalon (like those from Solar Spectrum) relies on a full-aperture pre-filter. The Baader D-ERF is that filter, designed to handle the full solar intensity collected by refractors with apertures as large as 180mm. Its primary function is safety and thermal stability, rejecting harmful energy to prevent the etalon's precision bandpass from shifting or \"de-tuning\" due to heat expansion.\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\u003eDielectric IR-Cut Coatings for Refractors from 75mm to 180mm\u003c\/h3\u003e\n\u003cp\u003eThe effectiveness of the Baader D-ERF comes from its sophisticated, hard dielectric IR-Cut coating. This multi-layer coating is vastly superior to simpler absorptive filters, as it reflects unwanted energy instead of absorbing it, keeping the filter itself cool. This reflective design ensures that the thermal load on your entire optical system is minimized, which is critical for maintaining sharp, high-contrast views of solar prominences and chromosphere details with any of the available sizes, from 75mm to 180mm.\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 purpose of the Baader D-ERF Energy Rejection Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader D-ERF is a required safety pre-filter for solar observation with rear-mounted H-alpha filter systems (like Solar Spectrum). It mounts on the front of your telescope and blocks most of the sun's energy, especially heat-intensive infrared (IR) light, before it enters the optical tube. This protects the delicate, expensive etalon from heat damage and thermal instability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Baader D-ERF for my dedicated Lunt or Coronado solar telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Dedicated solar telescopes like those from Lunt or Coronado have their energy rejection filters built directly into the optical system. The Baader D-ERF is specifically for component-based H-alpha systems where you add a rear-mounted etalon to a standard nighttime refractor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right size Baader D-ERF for my 130mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must choose a D-ERF with a clear aperture equal to or larger than your telescope's objective lens. For a 130mm refractor, the \u003cstrong\u003e135mm Baader D-ERF\u003c\/strong\u003e would be the correct choice. You will also need a separate, appropriate filter cell to mount it securely to the front of your specific telescope model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader D-ERF by itself for white-light solar viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolutely not.\u003c\/strong\u003e The D-ERF is a pre-filter only and is not safe for visual or photographic use on its own. It passes all visible light, including the dangerously intense photosphere, as well as the desired H-alpha wavelength. You must use it in conjunction with a proper, rear-mounted H-alpha etalon and blocking filter system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat happens if I use my Solar Spectrum filter on a 150mm refractor without a D-ERF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFocusing the unfiltered light from a 150mm objective onto a rear-mounted etalon would generate extreme temperatures, enough to cause immediate and catastrophic damage. The intense heat would permanently destroy the delicate coatings and internal components of the etalon and could potentially damage the telescope or cause a fire. An ERF is not optional; it is a mandatory safety component.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader D-ERF's IR-Cut coating work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader D-ERF uses a hard, multi-layer dielectric coating that acts like a mirror to infrared light while allowing visible light (including the 656nm H-alpha line) to pass through. By reflecting the heat energy instead of absorbing it, the filter itself stays cool and does not radiate heat into the telescope tube, ensuring maximum thermal stability for the entire system.\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\u003eSolar Energy Rejection Pre-Filter (ERF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eDielectric IR-Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Apertures\u003c\/td\u003e\n\u003ctd\u003e75mm, 90mm, 110mm, 135mm, 160mm, 180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eRequired for rear-mounted H-alpha solar filter systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eRequires separate, telescope-specific cell (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.07 (75mm)\u003cbr\u003e0.87 (90mm)\u003cbr\u003e0.32 (110mm)\u003cbr\u003e0.78 (135mm)\u003cbr\u003e0.54 (160mm)\u003cbr\u003e0.69 (180mm)\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\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eIR-Cut, Solar, Specialty, UV-Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eSpecial Size: Ø 75 mm ± 0.05 mm (75mm)\u003cbr\u003eSpecial Size: Ø 89.9 mm ± 0.05 mm (90mm)\u003cbr\u003eSpecial Size: Ø 109.9 mm ± 0.05 mm (110mm)\u003cbr\u003eSpecial Size: Ø 134.9 mm ± 0.05 mm (135mm)\u003cbr\u003eSpecial Size: Ø 159.6 mm ± 0.05 (160mm)\u003cbr\u003eSpecial Size: Ø 179.9 mm ± 0.05 (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e6.0 mm (75mm)\u003cbr\u003e5.0 mm (90mm)\u003cbr\u003e8.1 mm (110mm)\u003cbr\u003e9.1 mm (135mm)\u003cbr\u003e9.9 mm (160mm)\u003cbr\u003e12.5 mm (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHBW (Halfbandwidth)\u003c\/td\u003e\n\u003ctd\u003e80nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e650 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003e610 – 690 nm\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 D-ERF Energy Rejection Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e(Selected Size)\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_D-ERF_Filter_Safe_Use_Notes.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 D-ERF Filter Safe Use Notes\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":"75mm","offer_id":44967380844829,"sku":"BAA-2459241D","price":459.0,"currency_code":"CAD","in_stock":true},{"title":"90mm","offer_id":44967380877597,"sku":"BAA-2459242D","price":663.0,"currency_code":"CAD","in_stock":true},{"title":"110mm","offer_id":44967380910365,"sku":"BAA-2459243D","price":816.0,"currency_code":"CAD","in_stock":true},{"title":"135mm","offer_id":44967380943133,"sku":"BAA-2459244D","price":1311.0,"currency_code":"CAD","in_stock":true},{"title":"160mm","offer_id":44967380975901,"sku":"BAA-2459245D","price":1631.0,"currency_code":"CAD","in_stock":true},{"title":"180mm","offer_id":44967381008669,"sku":"BAA-2459246D","price":2416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-D-ERF-Energy-Rejection-Filter-75-180mm-1__30096.1597111115.1280.1280.jpg?v=1684341475"},{"product_id":"daystar-quark-chromosphere-solar-filter","title":"Daystar Quark Chromosphere Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAll-In-One Hydrogen-Alpha Solar Filter System\u003c\/li\u003e\n\u003cli\u003eDesigned for Chromosphere (Solar Surface) Detail\u003c\/li\u003e\n\u003cli\u003eIntegrated, H-Alpha Optimized Telecentric Barlow\u003c\/li\u003e\n\u003cli\u003eStandard Eyepiece-Sized Form Factor\u003c\/li\u003e\n\u003cli\u003eFor Use with Refractor Telescopes\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\u003eDaystar Quark Chromosphere Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark Chromosphere Solar Filter revolutionizes Hydrogen-Alpha observing by integrating a complete filter system into a single eyepiece-sized device. This all-in-one design combines a telecentric barlow, adapters, and a dedicated H-alpha filter, eliminating complex setups for use on a range of refractor telescopes. Optimized specifically for the Hydrogen-Alpha wavelength, the Quark Chromosphere is engineered to reveal high-contrast surface detail on the Sun, making dedicated solar observation more accessible than ever.\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\u003eHydrogen-Alpha Observing in an Eyepiece Form Factor\u003c\/h3\u003e\n\u003cp\u003eDaystar's Quark condenses an entire Hydrogen-Alpha filter assembly into a compact unit that drops into your diagonal just like an eyepiece. This fully integrated design eliminates the cost and complexity of sourcing separate barlows, adapters, and filter cells, streamlining your setup so you can start observing faster. Its lightweight, compact body reduces mechanical stress on your focuser and makes it an ideal companion for portable solar setups.\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\u003eIntegrated Telecentric Optics for a Flat, Evenly Illuminated Field\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Quark is a custom telecentric barlow lens, fully optimized in its coatings and optical design for the Hydrogen-Alpha wavelength. This specialized component ensures the light rays passing through the Fabry-Perot etalon are parallel, delivering superior field flatness from edge to edge. To further improve views, internal baffles are added to increase contrast, and all coatings are optimized to maximize transmission at the critical H-alpha line.\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\u003eTuned for High-Contrast Chromosphere Detail\u003c\/h3\u003e\n\u003cp\u003eThis Quark model is specifically qualified to reveal the Sun's chromosphere, the turbulent layer of plasma just above the visible surface. It is tuned to maximize contrast on features like plages, filaments, and the intricate structure within and around sunspot groups. While it can still show prominences, its strength lies in making the complex, ever-changing solar disk stand out with sharp definition.\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\u003eQuark Chromosphere vs. Prominence: Choosing Your Target\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two versions of the Quark so observers can choose a filter based on their primary observing goals rather than budget.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminence Model Advantage:\u003c\/strong\u003e The Prominence model is tuned to favor the faint, delicate structures erupting from the Sun's limb. It excels at capturing the detail in solar flares and large prominence loops against the blackness of space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromosphere Model Advantage:\u003c\/strong\u003e This Chromosphere model provides higher contrast on the bright solar disk itself. If your primary interest is monitoring active regions, tracking filaments as they snake across the surface, or resolving granulation, this is the superior choice.\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\"\u003eWhat kind of telescope works best with the Daystar Quark Chromosphere?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark Chromosphere is designed for use with \u003cstrong\u003erefractor telescopes\u003c\/strong\u003e with focal ratios from f\/4 to f\/9. It is not suitable for use with Schmidt-Cassegrain or other reflector-style telescopes without significant, specialized adaptations and energy rejection components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need other filters to use the Quark Chromosphere safely?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, potentially.\u003c\/strong\u003e For safety and best thermal stability, refractors with front apertures larger than 80mm require a front-mounted \u003cstrong\u003eEnergy Rejection Filter (ERF)\u003c\/strong\u003e. For refractors 80mm or smaller, no front ERF is typically needed. Always confirm the specific requirements for your telescope before observing the Sun.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see solar flares with the Quark Chromosphere model?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, you can see prominences and flares with the Quark Chromosphere. However, it is specifically tuned to enhance contrast on the solar surface (chromosphere). For observers whose primary interest is capturing the faintest details in prominences against the dark sky, the \u003cstrong\u003eQuark Prominence model\u003c\/strong\u003e is the recommended choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the Daystar Quark Chromosphere powered?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark requires power to heat its internal etalon to the precise operating temperature. It is powered via a micro-USB port and can be run from a wall outlet or a small, portable USB battery pack for field use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quark Chromosphere for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Quark is an excellent tool for solar imaging. Simply attach a planetary or monochrome astronomy camera in place of an eyepiece to capture detailed images of the solar surface. Its flat-field telecentric optics provide sharp results across the camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between a filament and a prominence seen with the Quark Chromosphere?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThey are the same physical structure viewed from different angles. When you see a cloud of gas erupting from the edge (limb) of the Sun, it's called a \u003cstrong\u003eprominence\u003c\/strong\u003e because it's silhouetted against dark space. When that same structure rotates onto the bright solar disk, it appears as a dark, snake-like line called a \u003cstrong\u003efilament\u003c\/strong\u003e. The Quark Chromosphere is optimized to show high contrast on these filaments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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\/Daystar_Filters_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967454834973,"sku":"DAY-DSZ4C","price":1799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quark-Solar-Filter-1__60627.1597187453.1280.1280.jpg?v=1684342393"},{"product_id":"daystar-quark-prominence-solar-filter","title":"Daystar Quark Prominence Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eHydrogen-Alpha Solar Filter (Prominence Model)\u003c\/li\u003e\n\u003cli\u003eIntegrated 4.2X Telecentric Barlow\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/4 to F\/9 Refractors\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Eyepiece Barrel\u003c\/li\u003e\n\u003cli\u003eUSB Powered (5V, 1.5A)\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\u003eDaystar Quark Prominence Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark Prominence Solar Filter revolutionizes solar observing by integrating a hydrogen-alpha etalon and a 4.2X telecentric barlow into a single 1.25\" eyepiece-sized housing. Optimized for the 656nm wavelength, this all-in-one unit is designed for refractors from F\/4 to F\/9 and is powered by a standard 5V 1.5A USB input, eliminating complex setups.\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 First All-in-One Solar \"Eyepiece\"\u003c\/h3\u003e\n\u003cp\u003eDaystar's Quark simplifies hydrogen-alpha astronomy by combining a telecentric barlow, adapters, and a Fabry-Perot etalon into one compact device. This integrated design eliminates the cost and complexity of assembling separate components, allowing you to simply insert the Quark into your diagonal, add an eyepiece, and begin observing. Its lightweight, eyepiece-sized form factor reduces weight on your focuser and makes it an ideal companion for portable solar setups.\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\u003eIntegrated 4.2X Telecentric Barlow for Flat-Field Views\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Quark is a custom 4.2X telecentric barlow, fully optimized with coatings and an optical design specifically for the 656nm H-alpha wavelength. Unlike a standard barlow, this telecentric lens ensures the light rays are parallel when they pass through the etalon, delivering superior field flatness and sharpness from edge to edge. Internal baffles are also incorporated to maximize contrast, revealing fine structural detail in solar phenomena.\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\u003eOptimized for Prominences at the 656nm H-Alpha Wavelength\u003c\/h3\u003e\n\u003cp\u003eThis Quark model is specifically qualified to show prominences with maximum contrast and brightness. Instead of targeting a specific FWHM bandpass, it is tuned to make the faint, dynamic structures at the Sun's limb stand out against the blackness of space. This makes it the ideal choice for observing dramatic solar flares, eruptive loops, and detached filaments that extend far into the corona.\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\u003eUSB-Powered for F\/4 to F\/9 Refractors\u003c\/h3\u003e\n\u003cp\u003eEngineered for versatility, the Quark is designed for use with refractors with a focal ratio between F\/4 and F\/9. The internal heating system, which brings the etalon to its precise operating temperature, runs on a common 5V 1.5A USB power source. You can power it from the included wall adapter or any standard portable USB battery pack for all-day observing sessions in the field. The 1.25\" output includes a non-marring brass compression ring to securely hold your eyepieces.\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\u003eQuark Prominence vs. Chromosphere: Which Model Is Right for You?\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two Quark models tuned for different observing goals. While both operate at the same H-alpha wavelength, their bandpass characteristics are different.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuark Chromosphere:\u003c\/strong\u003e This model has a narrower bandpass, which increases contrast on the solar disk itself. It is the superior choice for viewing surface details like plages, filaments, sunspot details, and granulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuark Prominence (This Model):\u003c\/strong\u003e This filter has a slightly wider bandpass. This design choice makes the fainter, extended structures of prominences at the solar limb appear brighter and more detailed, making it the definitive choice for observing eruptive solar activity.\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\"\u003eWhat kind of telescope do I need for the Daystar Quark Prominence filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Quark Prominence is designed specifically for \u003cstrong\u003erefracting telescopes with focal ratios from F\/4 to F\/9\u003c\/strong\u003e. It is not suitable for off-axis applications on Schmidt-Cassegrain or other reflector telescopes. For safe operation, an appropriate front-mounted Energy Rejection Filter (ERF) is required for any telescope with an aperture larger than 80mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quark Prominence on my 80mm f\/6 refractor to see solar flares?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, an 80mm f\/6 refractor is an excellent match for the Quark Prominence. The Quark's internal 4.2X barlow will increase your telescope's effective focal length to 2016mm (480mm x 4.2), providing a large solar disk image perfect for resolving the delicate structures within solar flares and eruptive prominences.\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 Quark Prominence and Quark Chromosphere models?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice depends on your primary observing target.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eQuark Prominence\u003c\/strong\u003e (this model) is optimized for viewing activity at the edge of the Sun. Its bandpass makes faint flares, loops, and eruptions appear brighter.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eQuark Chromosphere\u003c\/strong\u003e is optimized for surface detail on the solar disk. Its narrower bandpass provides higher contrast for features like filaments, plages, and sunspot structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Daystar Quark Prominence perform on a large prominence like the ones seen during recent solar maximum events?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter is precisely designed for those events. It excels at revealing the faint, extended, and intricate structures of large eruptive prominences. You will see these features with high contrast against the black background of space, allowing you to trace their full extent as they arch away from the solar limb.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Daystar Quark Prominence in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark is powered by a standard \u003cstrong\u003eUSB 5V, 1.5A connection\u003c\/strong\u003e. You can use the included 90-240VAC wall adapter with international plugs or, for field use, any small, palm-sized USB power bank that meets the power requirement. This makes it easy to conduct observing sessions away from AC power sources.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need other filters with the Daystar Quark Prominence?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, this is critical for safety.\u003c\/strong\u003e For any refractor with an aperture over 80mm, you \u003cstrong\u003emust\u003c\/strong\u003e use a full-aperture Energy Rejection Filter (ERF) mounted on the front of the telescope. For refractors 80mm and under, a front-mounted UV\/IR cut filter is strongly recommended to protect the Quark's internal components and improve contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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\/Daystar_Filters_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967454900509,"sku":"DAY-DSZ4P","price":1799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quark-Solar-Filter-1__22254.1597187418.1280.1280.jpg?v=1684342396"},{"product_id":"daystar-quark-gemini-chrom-prom-switchable-solar-filter","title":"Daystar Quark Gemini Chrom\/Prom Switchable Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Switchable H-alpha Etalons:\u003c\/strong\u003e Instantly select a ≤0.5Å bandpass for chromosphere detail or a ≥0.6Å bandpass for bright prominences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated 4.3x Telecentric Barlow:\u003c\/strong\u003e Optimizes your telescope's light path for the 656nm wavelength, ensuring maximum contrast and sharpness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e22mm Clear Aperture:\u003c\/strong\u003e Provides a generous field of view for observing and imaging the solar disk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstant Slide-Action Switching:\u003c\/strong\u003e Change views without swapping eyepieces, filters, or losing focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Power System:\u003c\/strong\u003e Operates on 5VDC 2.0 Amp power and includes a 110-240VAC wall adapter with international plugs.\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\u003eDaystar Quark Gemini Chrom\/Prom Switchable Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark Gemini Chrom\/Prom Switchable Solar Filter integrates two distinct Fabry-Perot etalons into a single unit, allowing instant switching between a narrow ≤0.5Å bandpass for high-contrast chromosphere detail and a wider ≥0.6Å bandpass for bright, expansive prominences. Its internal 4.3x telecentric barlow is optimized for the 656nm H-alpha wavelength, ensuring your telescope's light path is corrected for the filter's optics. With a 22mm clear aperture and a standard 1.25\" drawtube, the Gemini provides two specialized solar filters in one device, eliminating the need to swap hardware mid-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\u003eInstant Switching: 0.5Å Chromosphere \u0026amp; 0.6Å Prominence Views\u003c\/h3\u003e\n\u003cp\u003eThe core of the Gemini is its dual-etalon system, operated by a simple slider. Pushing the arm to one side engages the ≤0.5Å bandpass filter, which darkens the solar disk to reveal stunning surface details like filaments, spicules, and active region plage with maximum contrast. A slide to the other side engages the ≥0.6Å filter, which offers a brighter view and wider bandpass ideal for capturing faint, dynamic prominences and flares erupting from the solar limb. This instant switching requires no refocusing, allowing for immediate A\/B comparisons—a powerful tool for outreach and for adapting your view to changing solar activity.\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\u003eIntegrated 4.3x Telecentric Barlow for 656nm Optimization\u003c\/h3\u003e\n\u003cp\u003eA Fabry-Perot etalon requires a highly parallel light beam to perform correctly. The Quark Gemini includes a built-in 4.3x telecentric barlow specifically designed and coated for the 656nm H-alpha wavelength. This crucial component ensures that light from your telescope's objective enters the etalon at the proper angle, regardless of your telescope's native focal ratio. This optimization is key to achieving a uniform, high-contrast image across the entire 22mm field of view.\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\u003e5VDC Power and 1.25\" Telescope Integration\u003c\/h3\u003e\n\u003cp\u003eTo maintain its precise bandpass, the Quark Gemini's etalons must be heated to a stable operating temperature. The unit requires a 5VDC, 2.0 Amp power source and includes a universal 110-240VAC wall adapter with international plugs for home use. For field observations, it can be powered by a common portable USB battery pack. The Gemini fits any standard 1.25\" focuser or diagonal, and optional T-thread, C-mount, and 2\" adapters are available for full compatibility with imagers and larger focusers.\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\u003eQuark Gemini vs. Single-Bandpass: Two Filters, Zero Swapping\u003c\/h3\u003e\n\u003cp\u003eWhile an observer could purchase separate Chromosphere and Prominence Quarks, the Gemini offers a decisive advantage in convenience and workflow. Owning two separate filters means physically swapping them, re-focusing, and potentially re-balancing the telescope with each change. The Gemini consolidates this into one accessory with one power cable, allowing you to see both views in seconds. This makes it the superior choice for public outreach, educational demonstrations, and for imagers who need to capture both surface and limb detail efficiently during a single session.\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 main advantage of the Daystar Quark Gemini's dual filter system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is the ability to \u003cstrong\u003einstantly switch between two different H-alpha bandpasses\u003c\/strong\u003e (≤0.5Å for the chromosphere and ≥0.6Å for prominences) without changing hardware. This eliminates the need for swapping filters, refocusing, or rebalancing your telescope, allowing for seamless comparison between high-contrast surface detail and brighter limb phenomena.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is best suited for the Quark Gemini?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark Gemini is ideal for \u003cstrong\u003erefracting telescopes\u003c\/strong\u003e, particularly those with focal ratios of F\/7 or longer. While it can be used with Schmidt-Cassegrain or Maksutov-Cassegrain telescopes, these designs require a full-aperture UV\/IR cut filter to be placed over the front of the telescope to prevent internal heat buildup and potential damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Quark Gemini improve views of a solar flare compared to a standard filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a dynamic event like a solar flare, you can instantly slide the Quark Gemini to the \u003cstrong\u003e≥0.6Å prominence setting\u003c\/strong\u003e. This wider, brighter bandpass is better at capturing the faint, extended structures of a flare as it erupts from the solar limb, making it appear more dramatic and detailed against the black background of space compared to a narrower, dimmer chromosphere filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to refocus when switching between the 0.5Å and 0.6Å bandpasses on the Quark Gemini?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. A key design feature of the Quark Gemini is that the two Fabry-Perot etalons are paired to be \u003cstrong\u003eparfocal\u003c\/strong\u003e. You can switch between the chromosphere and prominence views using the slider without any need to adjust your telescope's focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I power the Daystar Quark Gemini from a field battery?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Quark Gemini requires a \u003cstrong\u003e5VDC, 2.0 Amp\u003c\/strong\u003e power source. It can be easily powered in the field using a common portable power bank or USB battery pack that meets this specification, connecting via a standard USB cable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Quark Gemini work with my 2-inch focuser and eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark Gemini comes standard with a \u003cstrong\u003e1.25\" female drawtube\u003c\/strong\u003e for 1.25\" eyepieces and fits into a 1.25\" focuser. To use it with a 2-inch focuser or 2-inch eyepieces, you will need to purchase an optional 2-inch adapter, which is available separately.\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\u003eDual, Switchable Fabry-Perot Etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003eHydrogen-alpha (656nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass 1 (Chromosphere)\u003c\/td\u003e\n\u003ctd\u003e≤0.5Å FWHM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass 2 (Prominence)\u003c\/td\u003e\n\u003ctd\u003e≥0.6Å FWHM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Mechanism\u003c\/td\u003e\n\u003ctd\u003eManual Slider, Parfocal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd\u003e4.3x Telecentric (fully multi-coated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e22mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" Female Drawtube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-Band Blocking\u003c\/td\u003e\n\u003ctd\u003eX-ray to 2 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e5V DC, 2.0 Amp (10W) via USB\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\"\u003eQuark Gemini Chrom\/Prom Switchable Solar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e110-240VAC Wall Power Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInternational Plug Set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePelican-Style Protective Case\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\/Daystar_Filters_Combo_Gemini_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967454998813,"sku":"DAY-DSZ4G","price":3633.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quark-Gemini-DSZ4G__39151.1650381642.1280.1280.jpg?v=1684342392"},{"product_id":"daystar-combo-quark-chromosphere-solar-filter","title":"Daystar Combo Quark Chromosphere Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eHydrogen-Alpha Solar Filter for Chromosphere Viewing\u003c\/li\u003e\n\u003cli\u003eOptimized for Long Focal Ratio Telescopes (f\/15+)\u003c\/li\u003e\n\u003cli\u003eAll-in-One, Eyepiece-Sized Design\u003c\/li\u003e\n\u003cli\u003eLow-Power USB Operation\u003c\/li\u003e\n\u003cli\u003eRequires Off-Axis ERF for SCT\/Maks (Sold Separately)\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\u003eDaystar Combo Quark Chromosphere Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Combo Quark Chromosphere Solar Filter is an all-in-one Hydrogen-Alpha \"eyepiece\" designed to reveal the Sun's dynamic surface. It converts long focal ratio telescopes like Schmidt-Cassegrains, Maksutovs, and refractors with focal ratios of f\/15 or longer into dedicated solar instruments. This model is specifically qualified to show chromosphere detail, bringing features like plages and filaments into high contrast at the 656nm wavelength using a simple 5v USB power source.\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\u003eHydrogen-Alpha Solar Observing for Long Focal Ratio Telescopes\u003c\/h3\u003e\n\u003cp\u003eThis Combo Quark is engineered specifically for telescopes with long focal ratios, from f\/15 to f\/30. This makes it a perfect match for most Schmidt-Cassegrain and Maksutov-Cassegrain telescopes, which natively operate at these focal ratios, as well as long refractors. The design leverages the native focal length of these instruments to achieve the correct telecentric beam for the internal Fabry-Perot etalon without additional optical components.\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\u003eAll-in-One Design: Simplified H-Alpha Viewing at 656nm\u003c\/h3\u003e\n\u003cp\u003eDaystar's all-in-one design integrates the adapters, snout, and hydrogen-alpha filter into a single, lightweight, eyepiece-sized unit. This eliminates the complexity and cost of assembling a separate filter system. The internal optics feature baffles to increase contrast and anti-reflection coatings optimized for the 656nm H-alpha wavelength, ensuring you see the highest-contrast view of the solar chromosphere.\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\u003eUSB Power and Critical Safety Requirements\u003c\/h3\u003e\n\u003cp\u003eThe Quark's internal etalon requires precise heating, which is managed by a low-draw system powered by a standard 5v USB connection. This allows you to power the filter all day from a small portable battery pack or the included wall adapter. For safe operation on an SCT or Maksutov, you must use a telescope-specific, off-axis Energy Rejection Filter (ERF). Using the Quark on these designs without an ERF will cause permanent damage to your telescope's secondary mirror.\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\u003eCombo Quark Chromosphere vs. Prominence: Choosing Your Target\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two versions of the Combo Quark, qualified for different solar features. This Chromosphere model is the ideal choice if your primary interest is surface detail.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromosphere Model (This Product):\u003c\/strong\u003e Optimized for maximum contrast on features across the solar disk. You will see bright plages around sunspots, dark, snaking filaments, and the granular texture of the solar surface with exceptional clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminence Model:\u003c\/strong\u003e This variant is optimized for the slightly different tuning needed to see features on the limb of the Sun. It excels at showing faint, eruptive prominences against the blackness of space, though surface detail will appear softer.\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\"\u003eWhat is the difference between the Daystar Combo Quark Chromosphere and Prominence models?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eChromosphere model\u003c\/strong\u003e is tuned for the highest contrast on the Sun's surface, making it ideal for viewing filaments, plages, and sunspot details. The \u003cstrong\u003eProminence model\u003c\/strong\u003e is tuned to best show the fainter details on the solar limb, such as loops and eruptions against the black background of space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need an ERF with the Combo Quark for my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn Energy Rejection Filter (ERF) is a critical safety component that must be placed at the front of your Schmidt-Cassegrain or Maksutov telescope. It reflects most of the Sun's heat and light before it enters the optical tube. Without an ERF, the concentrated energy would destroy your telescope's secondary mirror and potentially damage the Quark filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Combo Quark Chromosphere on my f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this Combo Quark model is designed for telescopes with focal ratios of f\/15 or longer. Using it on a faster f\/7 refractor would require a 2x or greater Barlow lens to slow the light cone down to the required focal ratio for the filter to work correctly. For faster refractors, Daystar offers other Quark models designed for that purpose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Daystar Combo Quark Chromosphere in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter is powered via a standard USB port, requiring a 5v, 1.5amp source. You can use the included wall adapter or, for field use, a small, palm-sized USB battery pack. This low power consumption allows for a full day of observing from a typical portable power bank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of solar details will the Combo Quark Chromosphere show on the Sun's surface?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis model is optimized for surface detail. On an active day, you can expect to see \u003cstrong\u003efilaments\u003c\/strong\u003e (dark, rope-like structures), \u003cstrong\u003eplages\u003c\/strong\u003e (bright regions often surrounding sunspots), and the fine, mottled pattern of the \u003cstrong\u003esolar granulation\u003c\/strong\u003e. It provides a dynamic, high-contrast view of the Sun's chromosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Daystar Combo Quark Chromosphere have a specific FWHM bandpass rating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, Daystar does not assign a specific Full-Width Half-Maximum (FWHM) bandpass to the Quark models. Instead, each unit is qualified based on its intended visual target—either prominence or chromosphere detail—to ensure it is optimized for that specific observing goal.\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eAll-in-One Hydrogen-Alpha Solar Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Wavelength\u003c\/td\u003e\n\u003ctd\u003e656nm (Hydrogen-Alpha)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Observing Target\u003c\/td\u003e\n\u003ctd\u003eSolar Chromosphere (Surface Detail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003ef\/15 to f\/30 SCTs, Maksutovs, and Refractors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003eUSB 5v 1.5amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Power Adapter\u003c\/td\u003e\n\u003ctd\u003e90-240VAC with international plug adapters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Connection\u003c\/td\u003e\n\u003ctd\u003eBrass compression ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERF Requirement\u003c\/td\u003e\n\u003ctd\u003eRequired for SCT\/Maks (Off-axis type, sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTechnology\u003c\/td\u003e\n\u003ctd\u003eDaystar Filters Fabry Perot etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eIncluded Twist-Case\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\/Daystar_Filters_Quark_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\"\u003eDownload 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\u003ca href=\"https:\/\/davidastro.com\/pages\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967455064349,"sku":"DAY-DSZCC","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Combo-Quark-1__87747.1597187047.1280.1280.jpg?v=1684342395"},{"product_id":"daystar-combo-quark-prominence-solar-filter","title":"Daystar Combo Quark Prominence Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptimized for Solar Prominences\u003c\/li\u003e\n\u003cli\u003eDesigned for Telescopes from f\/15 to f\/30\u003c\/li\u003e\n\u003cli\u003eAll-In-One, Eyepiece-Style Design\u003c\/li\u003e\n\u003cli\u003ePowered by Standard 5V USB\u003c\/li\u003e\n\u003cli\u003eRequires Off-Axis ERF for SCT\/Maksutov Telescopes (Sold Separately)\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\u003eDaystar Combo Quark Prominence Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Combo Quark Prominence Solar Filter transforms long focal ratio telescopes, from f\/15 to f\/30, into dedicated hydrogen-alpha solar instruments in a single, eyepiece-style unit. This all-in-one assembly integrates a Fabry Perot etalon with AR coatings optimized for the 656nm wavelength and is powered by a standard 5V 1.5amp USB source, eliminating the need for complex adapter configurations.\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\u003eAn All-In-One Hydrogen-Alpha Filter for f\/15-f\/30 Telescopes\u003c\/h3\u003e\n\u003cp\u003eDaystar's Combo Quark simplifies hydrogen-alpha solar observing by integrating the filter, adapters, and snouts into a single, lightweight device. Designed for telescopes with focal ratios of f\/15 or longer, such as Schmidt-Cassegrains, Maksutovs, and classic long-tube refractors, it operates just like an eyepiece. Simply insert the Quark into your diagonal, add your preferred eyepiece to the brass compression ring, and you are ready to view.\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\u003eOptimized for Prominences: Contrast-Enhancing Baffles and 656nm Coatings\u003c\/h3\u003e\n\u003cp\u003eThis model is specifically qualified to reveal solar prominences—the dramatic eruptions of plasma seen along the limb of the Sun. To maximize image contrast, the Quark features internal baffles and anti-reflection coatings precisely tuned for the 656nm hydrogen-alpha wavelength. This specialized design ensures that faint, eruptive details stand out clearly against the blackness of space.\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\u003e5V USB Power for All-Day Solar Sessions\u003c\/h3\u003e\n\u003cp\u003eThe internal Fabry Perot etalon requires precise heating to stay on-band, which is managed by a low-draw 5V, 1.5amp USB power system. This modern power solution allows the Quark to operate from various sources, including the included 90-240VAC wall adapter with international plugs or an optional palm-sized battery pack for field use. The efficient design enables continuous, all-day operation without significant power consumption.\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\u003eCritical Safety Requirements for SCT and Maksutov Telescopes\u003c\/h3\u003e\n\u003cp\u003eSafe solar observing is paramount. When using the Combo Quark with a Schmidt-Cassegrain or Maksutov-Cassegrain telescope, you must use an off-axis Energy Rejection Filter (ERF). Using this filter with a full-aperture SCT or Mak without an ERF will concentrate excessive heat and light, resulting in permanent damage to your telescope's secondary mirror. The required ERF is sold separately and must be matched to your specific telescope model.\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\u003eCombo Quark: Prominence vs. Chromosphere Models\u003c\/h3\u003e\n\u003cp\u003eDaystar offers the Combo Quark in two distinct versions tailored to different observing goals. While the Chromosphere model excels at revealing fine surface texture like filaments and plages, this Prominence model is specifically qualified to maximize contrast for outbursts and loops extending beyond the solar disk. This allows you to choose a filter based on your primary interest rather than a specific bandpass, as the final performance is a function of your telescope's focal ratio.\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\"\u003eHow do I use the Daystar Combo Quark Prominence filter with my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must first install an \u003cstrong\u003eoff-axis Energy Rejection Filter (ERF)\u003c\/strong\u003e, sold separately, over the front of your telescope. Once the ERF is securely in place, insert the Combo Quark into your diagonal, then place a standard eyepiece into the back of the Quark. The Quark's internal optics will bring your telescope's focal ratio into the required f\/15-f\/30 range for proper operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I expect to see with the Daystar Combo Quark Prominence and a long f\/15 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an f\/15 refractor, this filter is perfectly suited for high-contrast views of the solar limb. You can expect to see \u003cstrong\u003eeruptive prominences, detached filaments, and delicate loops\u003c\/strong\u003e set against a dark background. Surface detail like granulation and plages will be visible but less pronounced than with the companion Chromosphere model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of power supply does the Daystar Combo Quark Prominence filter need?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Combo Quark Prominence filter uses a standard \u003cstrong\u003eUSB 5V, 1.5amp power source\u003c\/strong\u003e. It includes a 90-240VAC wall adapter with international plugs. For portability, it can also be powered by a small, optional USB battery pack, allowing for extended observing sessions in the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need any special adapters for the Daystar Combo Quark Prominence filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Daystar Combo Quark Prominence is an all-in-one design that fits directly into a standard 1.25\" or 2\" diagonal. The only essential accessory is an \u003cstrong\u003eoff-axis ERF for SCT and Maksutov telescopes\u003c\/strong\u003e, which is a critical safety component, not a mechanical adapter.\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 Daystar Combo Quark Prominence and Chromosphere models?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two models are tuned for different solar features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminence Model (this one):\u003c\/strong\u003e Optimized for high-contrast views of features on the Sun's edge (limb), like flares and eruptions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromosphere Model:\u003c\/strong\u003e Optimized for viewing details on the Sun's surface (disk), such as filaments, plages, and granulation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy doesn't the Daystar Combo Quark Prominence have a specific bandpass rating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe final filter bandpass of the Daystar Combo Quark Prominence is dependent on the focal ratio of the telescope it's used with. Instead of providing a fixed FWHM number that can be misleading, Daystar qualifies each unit to perform best for a specific observational goal—in this case, viewing solar prominences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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\/Daystar_Filters_Combo_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967455097117,"sku":"DAY-DSZCP","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Combo-Quark-1__65848.1597187012.1280.1280.jpg?v=1684342398"},{"product_id":"daystar-camera-quark-chromosphere-solar-filter","title":"Daystar Camera Quark Chromosphere Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTransforms Canon or Nikon SLR lenses into a Hydrogen-Alpha solar telescope\u003c\/li\u003e\n\u003cli\u003eIntegrated, H-Alpha optimized telecentric Barlow lens\u003c\/li\u003e\n\u003cli\u003eUSB-powered, heated Fabry-Perot etalon for thermal stability\u003c\/li\u003e\n\u003cli\u003eSupports both camera and eyepiece-based observation\u003c\/li\u003e\n\u003cli\u003eIncludes reversible mounting foot with tripod threads and Vixen-style dovetail\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\u003eDaystar Camera Quark Chromosphere Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Camera Quark Chromosphere Solar Filter converts your standard telephoto lens into a dedicated Hydrogen-alpha solar instrument, unlocking detailed views of the sun's dynamic chromosphere. This all-in-one adapter houses a precision DayStar Fabry-Perot etalon and an integrated, H-alpha optimized telecentric Barlow lens. Simply attach the Camera Quark between your existing Canon or Nikon lens and your camera body to begin exploring solar prominences, filaments, and surface granulation.\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\u003eH-alpha Conversion: Turn Your SLR Lens into a Solar Telescope\u003c\/h3\u003e\n\u003cp\u003eThe Camera Quark is an elegant solution for photographers wanting to enter the world of H-alpha solar imaging without investing in a new, dedicated telescope. The patent-pending design combines the necessary etalon and a telecentric Barlow in a single, lightweight device that mounts directly to your lens. This approach allows you to use the zoom feature of your camera lens to seamlessly shift from wide-field views of the full solar disc to high-magnification close-ups of active regions, all without changing your optical setup.\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\u003eUSB-Powered Etalon: Stable, On-the-Go Solar Viewing\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Camera Quark is a solid Fabry-Perot etalon that must be heated to a precise temperature to remain on the critical 656.28nm H-alpha line. The unit is powered by a common USB power source, allowing you to run it all day from a wall adapter or a small, portable battery pack for field use. An LED indicator light clearly shows the filter's status, changing from warming to ready, so you know exactly when your system is thermally stable and optimized for the highest contrast views.\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\u003eIntegrated Mounting \u0026amp; Adapters: Connect to Cameras, Eyepieces, and Mounts\u003c\/h3\u003e\n\u003cp\u003eDesigned for maximum flexibility, the Camera Quark attaches securely with a bayonet mount for either Canon or Nikon lenses. It includes the corresponding camera body adapter, but its utility extends beyond imaging. An included drawtube adapter allows you to insert a standard 1.25\" eyepiece for direct visual observation. For stable mounting, a reversible combination lens foot provides both standard tripod holes and a Vixen-style dovetail, enabling you to mount your entire lens-and-camera setup on a simple photo tripod or a more robust astronomical mount.\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\u003eManual Operation: Key Considerations for Modern Lenses\u003c\/h3\u003e\n\u003cp\u003eThe Camera Quark does not feature electronic pass-through, which is a critical consideration for use with modern lenses. You will need to operate your lens in full manual mode, controlling both focus and aperture mechanically. Lenses that require electronic signals from the camera body for these functions may not be compatible. For safety, Daystar also recommends using a front-mounted, color-neutral energy rejection filter (ERF) on any lens with an objective larger than 80mm in aperture to prevent excess heat buildup.\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\u003eCamera Quark vs. Dedicated Solar Telescopes: Portability vs. Aperture\u003c\/h3\u003e\n\u003cp\u003eA dedicated solar telescope offers an all-in-one, optimized system, often with a larger aperture and internal ERF, but at the cost of being a single-purpose instrument. The Camera Quark's primary advantage is its portability and adaptability. It allows you to leverage the high-quality optics you already own, creating a compact, travel-friendly solar imaging rig that fits in a camera bag. While a dedicated scope might resolve finer detail due to a larger objective, the Camera Quark provides an accessible and versatile entry point for capturing stunning H-alpha images of the sun.\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\"\u003eHow do I power the Daystar Camera Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Camera Quark requires a \u003cstrong\u003eUSB power source (5V, 1.5A)\u003c\/strong\u003e to heat its internal etalon. You can use the included wall adapter or a portable USB battery pack for use in the field. An LED indicator lets you know when the filter is warming up and when it has reached its stable operating temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Camera Quark visually with an eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Camera Quark includes a \u003cstrong\u003e1.25\" drawtube adapter\u003c\/strong\u003e that allows you to insert a standard astronomy eyepiece. This lets you use your camera lens and the Quark as a complete, portable visual solar telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Daystar Camera Quark work with my zoom lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, and this is one of its most powerful features. Using a zoom lens allows you to change your field of view and magnification without altering the setup. You can frame the entire solar disk at a wide setting and then zoom in to study a specific sunspot group or prominence in high detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an extra filter for my 100-400mm lens with the Daystar Camera Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. For any lens with an aperture \u003cstrong\u003elarger than 80mm\u003c\/strong\u003e, Daystar strongly recommends using a front-mounted energy rejection filter (ERF). This filter reduces the heat load on the internal components of the Quark and your lens, ensuring safe operation and protecting your equipment. An ERF is not included and must be purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill my camera's autofocus work through the Daystar Camera Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Daystar Camera Quark has \u003cstrong\u003eno electronic pass-through\u003c\/strong\u003e. This means no communication can occur between your camera body and the lens. You must set your lens to manual focus and, if applicable, manually set the aperture ring. Lenses that rely solely on electronic control for focus or aperture will not work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I image both solar prominences and surface detail with the Camera Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCapturing both requires different exposure settings. First, achieve sharp manual focus on the limb of the sun using your camera's live view. For \u003cstrong\u003eprominences\u003c\/strong\u003e, use a higher exposure setting to capture the faint structures extending into space. For \u003cstrong\u003esurface detail\u003c\/strong\u003e like filaments and granulation, you will need a much shorter exposure. It is standard practice to take separate videos or image sets for each and combine them during processing.\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\u003eFor Canon, For Nikon\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\/Daystar_Filters_Camera_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"For Canon","offer_id":44967455129885,"sku":"DAY-DSZTCC","price":2093.0,"currency_code":"CAD","in_stock":true},{"title":"For Nikon","offer_id":44967455162653,"sku":"DAY-DSZTNC","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Camera-Quark-1__96901.1597186809.1280.1280.jpg?v=1684342404"},{"product_id":"daystar-camera-quark-prominence-solar-filter","title":"Daystar Camera Quark Prominence Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTransforms Canon or Nikon SLR lenses into a Hydrogen-Alpha solar telescope\u003c\/li\u003e\n\u003cli\u003eOptimized for high-contrast views of solar prominences\u003c\/li\u003e\n\u003cli\u003eInternal Fabry-Perot etalon with USB-powered heating\u003c\/li\u003e\n\u003cli\u003eIntegrated telecentric lens system ensures a flat, evenly illuminated field\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" eyepieces or camera bodies for flexible viewing\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\u003eDaystar Camera Quark Prominence Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Camera Quark Prominence Solar Filter transforms your standard Canon or Nikon SLR lens into a dedicated Hydrogen-alpha solar telescope. This all-in-one unit houses a precisely tuned Fabry-Perot etalon and an optimized telecentric lens system, placing high-contrast views of solar prominences within reach of your existing camera gear. Simply attach the Camera Quark between your lens and camera body to begin exploring the dynamic, ever-changing limb of the Sun.\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\u003eH-Alpha Solar Imaging with Your Canon or Nikon Lenses\u003c\/h3\u003e\n\u003cp\u003eThe Camera Quark leverages the investment you've already made in your photographic equipment. By attaching to the bayonet mount of your telephoto or zoom lens, it provides a direct, secure optical path for H-alpha observation. This design allows you to use your lens's zoom capabilities to go from wide, full-disk views to high-magnification close-ups of specific active regions without changing your setup.\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\u003eIntegrated Telecentric Optics for a Flat H-Alpha Field\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Camera Quark is a custom, integrated telecentric lens system. This is not a simple Barlow lens; it is an optical component specifically designed to work with the internal etalon, ensuring the light rays entering the filter are parallel across the entire field. The result is superior field flatness and even illumination, eliminating the off-axis artifacts that can compromise H-alpha viewing in less-optimized systems.\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\u003eUSB Power and Versatile Mounting for Field Operations\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability, the Camera Quark is powered by a standard USB connection, allowing it to run all day from a small, palm-sized battery pack or any USB power source. For secure attachment, it includes a reversible combination mounting foot. This foot features standard tripod threads for use with photographic tripods and a Vixen-style dovetail for a solid connection to any astronomical mount.\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\u003eCamera Quark Prominence vs. Chromosphere: Choosing Your View\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two versions of the Camera Quark, tuned for different solar features. Understanding the distinction is key to selecting the right tool for your observing goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromosphere Model Advantage:\u003c\/strong\u003e The Chromosphere version uses a narrower bandpass. This increases contrast on the Sun's turbulent surface, making it the superior choice for resolving fine details in plages, filaments, and granulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminence Model (This Model):\u003c\/strong\u003e The Prominence version has a slightly wider bandpass. This makes the faint, delicate structures of prominences appear brighter and more distinct against the black background of space, delivering the most dramatic views of solar ejections and loops on the Sun's limb.\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\u003eManual Control: Important Lens Compatibility Notes\u003c\/h3\u003e\n\u003cp\u003eThe Camera Quark is a fully manual device that does not electronically communicate with your lens or camera. You must be able to manually set your lens's focus to infinity and control its aperture. Lenses that require electronic control for these functions (\"focus-by-wire\") may not be compatible.\u003c\/p\u003e\n\u003cp\u003eAdditionally, for lenses with large apertures, Daystar recommends using a front-mounted red, orange, or yellow colored glass filter to act as an energy rejection filter (ERF). This reduces the heat load on the internal etalon, ensuring stable and safe operation during extended viewing sessions.\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\"\u003eHow do I power the Daystar Camera Quark in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eDaystar Camera Quark\u003c\/strong\u003e is powered via a standard USB port. This allows you to use it with any common portable USB battery pack, the same kind you would use to charge a smartphone, making it easy to power during a full day of solar observing away from AC outlets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use an eyepiece with the Daystar Camera Quark instead of a DSLR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eCamera Quark\u003c\/strong\u003e includes an adapter that allows you to insert a standard 1.25\" eyepiece. This lets you use your SLR lens and Quark combination as a visual Hydrogen-alpha telescope, not just an imaging system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between the Camera Quark Prominence and Chromosphere models?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two models are tuned for different features. The \u003cstrong\u003eProminence model (this one)\u003c\/strong\u003e has a slightly wider bandpass, which makes faint prominences on the solar limb appear brighter and with higher contrast. The \u003cstrong\u003eChromosphere model\u003c\/strong\u003e has a narrower bandpass, which is better for revealing fine surface details like filaments and plages against the bright solar disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an additional filter for my lens when using the Camera Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor lenses with large apertures (typically over 80mm), Daystar recommends using a simple colored glass filter (red, orange, or yellow) on the front of your lens. This acts as an Energy Rejection Filter (ERF), reflecting excess heat and light before it enters the lens, which protects the internal Quark components and improves thermal stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Camera Quark with a 300mm telephoto lens to frame a total solar eclipse?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 300mm lens with the \u003cstrong\u003eCamera Quark\u003c\/strong\u003e provides an excellent field of view for capturing the full solar disk with room to spare. During the partial phases, you would image as normal. During totality, you would remove the entire lens\/Quark assembly to capture the corona, as H-alpha filters block coronal light. The Quark is for observing the chromosphere and prominences, which are visible right up to the second and third contacts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Camera Quark work with my fast f\/2.8 zoom lens for capturing solar flares?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but you must stop the lens down. H-alpha etalons require a slow, near-parallel light cone to function correctly. While the internal telecentric lens helps, you should manually set your f\/2.8 lens to f\/8 or slower using its aperture ring for best results. Fast f-ratios will result in a wider, less detailed image.\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\u003eFor Canon, For Nikon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product does not have a specified list of included items.\u003c\/p\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\/Daystar_Filters_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"For Canon","offer_id":44967455228189,"sku":"DAY-DSZTCP","price":2093.0,"currency_code":"CAD","in_stock":true},{"title":"For Nikon","offer_id":44967455260957,"sku":"DAY-DSZTNP","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Camera-Quark-1__03123.1597186588.1280.1280.jpg?v=1684342409"},{"product_id":"daystar-quark-for-questar-chromosphere-solar-filter","title":"Daystar Quark for Questar Chromosphere Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAll-In-One Hydrogen-Alpha Solar Filter\u003c\/li\u003e\n\u003cli\u003eTuned for Chromosphere (Surface) Detail\u003c\/li\u003e\n\u003cli\u003eDesigned Exclusively for Questar Telescopes\u003c\/li\u003e\n\u003cli\u003eUSB-Powered for Field Use\u003c\/li\u003e\n\u003cli\u003eIncludes Native Questar Eyepiece and Rear Port Threads\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\u003eDaystar Quark for Questar Chromosphere Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark for Questar Chromosphere Solar Filter revolutionizes solar observing by integrating a telecentric barlow, adapters, and a hydrogen-alpha etalon into a single, eyepiece-sized unit. Designed exclusively for Questar telescopes, this all-in-one device attaches directly without extra adapters for immediate, high-contrast views of the solar chromosphere. It runs on convenient USB power, making it an ideal solution for both backyard and field observation of the Sun's dynamic surface.\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\u003eAn All-in-One Hydrogen-Alpha System for Questar Telescopes\u003c\/h3\u003e\n\u003cp\u003eThis Quark model eliminates the complexity of assembling a separate filter, energy rejection filter, and barlow lens. The entire optical system is contained in one compact device that inserts directly into your Questar's diagonal, ready for an eyepiece.\u003c\/p\u003e\n\u003cp\u003eThe efficient, optimized design reduces weight and cost, removing unnecessary components from the optical train. This integrated approach not only simplifies your setup but also makes high-quality solar observation more accessible and portable than ever before.\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\u003eChromosphere-Tuned for High-Contrast Solar Surface Detail\u003c\/h3\u003e\n\u003cp\u003eThis Quark is specifically qualified to reveal the intricate, high-contrast details of the Sun's chromosphere. You can expect to clearly see features like filaments snaking across the disk, bright plages surrounding active regions, and the fine granulation of the solar surface. The internal Daystar Fabry-Perot etalon is protected within the assembly, with anti-reflective coatings and baffles optimized for the hydrogen-alpha wavelength.\u003c\/p\u003e\n\u003cp\u003eInstead of designating a specific bandpass, Daystar tunes each Quark for an observational goal. This Chromosphere model is your choice for studying the dynamic, ever-changing surface of our star, prioritizing contrast over the faint features at the limb.\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\u003eUSB Power and Native Questar Threading\u003c\/h3\u003e\n\u003cp\u003eEngineered for modern convenience, the Quark runs on standard USB power, allowing it to operate all day from a small, palm-sized battery pack (sold separately) or the included wall adapter. For seamless integration, it features a unique triple-connector snout: a standard 1.25” barrel, native Questar eyepiece threading, and native Questar rear port threading. This ensures a secure, direct fit to your telescope without any guesswork.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Questar Fit:\u003c\/strong\u003e Attaches via the Questar eyepiece thread (1.270-32 UNS) or the rear port thread (M30x0.8) for a rigid connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Output:\u003c\/strong\u003e The 1.25\" eyepiece holder uses a brass compression ring to protect your eyepieces from scratches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Power:\u003c\/strong\u003e The included 90-240VAC adapter comes with international plugs, making it ready for travel.\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\u003eQuark Chromosphere vs. Prominence: Choosing Your Solar Target\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two versions of the Quark for Questar, tuned for different solar phenomena. The choice between them depends entirely on your primary observing interest.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminence Model Advantage:\u003c\/strong\u003e The Prominence version is tuned to be slightly off-band, which enhances the visibility of faint, delicate prominence structures erupting from the solar limb against the black background of space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromosphere Model Advantage:\u003c\/strong\u003e This Chromosphere model provides a tighter, on-band view. This increases contrast across the solar disk, making it superior for resolving the complex web of filaments, plages, and active regions that define the Sun's surface. While very bright prominences may still be visible, this filter's strength is surface detail.\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\"\u003eWhat solar features is the Daystar Quark for Questar Chromosphere best for observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis Quark is specifically tuned for the Sun's chromosphere. It excels at revealing high-contrast surface details like \u003cstrong\u003efilaments\u003c\/strong\u003e, \u003cstrong\u003eplages\u003c\/strong\u003e, \u003cstrong\u003eactive regions\u003c\/strong\u003e, and fine \u003cstrong\u003egranulation\u003c\/strong\u003e around sunspots.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quark for Questar on a non-Questar telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e This version of the Quark is engineered exclusively for Questar telescopes and uses their specific rear port and eyepiece threading. It will not attach to or work correctly with other telescope brands.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Daystar Quark for Questar in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark is powered via a standard USB port. It can be run all day using a small, portable USB battery pack (sold separately) or the included wall adapter if an AC outlet is available.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy doesn't the Daystar Quark for Questar Chromosphere have a specific FWHM bandpass rating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDaystar qualifies Quark filters based on their intended observing target (chromosphere or prominence) rather than a specific Full-Width Half-Max (FWHM) bandpass number. This approach ensures the filter is optimized for viewing specific solar features, providing excellent contrast on the solar disk for this Chromosphere model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Daystar Quark for Questar perform on my Questar 3.5 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark is optimized for the focal ratios of Questar telescopes, which are typically slow systems. It will perform very well, delivering sharp, high-contrast views of the chromosphere without needing any additional optical correctors or accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Quark for Questar Chromosphere show me solar prominences at all?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Chromosphere model is optimized for surface detail, you may still be able to see very bright prominences against the blackness of space. However, for observing fainter, more detailed prominence structures, the \u003cstrong\u003eDaystar Quark for Questar Prominence model\u003c\/strong\u003e is the recommended choice.\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\u003eHydrogen-Alpha Solar Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eChromosphere (Surface Detail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Wavelength\u003c\/td\u003e\n\u003ctd\u003eHydrogen-alpha (656nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eQuestar Telescopes Only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Focal Ratio\u003c\/td\u003e\n\u003ctd\u003eF\/13 and slower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Connections\u003c\/td\u003e\n\u003ctd\u003e1.25” snout, Native Questar eyepiece thread (1.270-32 UNS), Native Questar rear port thread (M30x0.8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" Eyepiece Holder with Brass Compression Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003eUSB 5V, 1.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Power Adapter\u003c\/td\u003e\n\u003ctd\u003e90-240VAC Wall Adapter with International Plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eIncluded Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication Warning\u003c\/td\u003e\n\u003ctd\u003eNot suited for off-axis application\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\"\u003eDaystar Quark for Questar Chromosphere Solar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e90-240VAC Wall Power Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInternational Plug Adapters\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Twist-Case\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\/Daystar_Filters_Questar_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967455293725,"sku":"DAY-DSZQC","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quark-Questar-1__42269.1597184555.1280.1280.jpg?v=1684342413"},{"product_id":"daystar-quark-for-questar-prominence-solar-filter","title":"Daystar Quark for Questar Prominence Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTransforms a Questar telescope into a Hydrogen-alpha solar telescope\u003c\/li\u003e\n\u003cli\u003eProminence model optimized for high-contrast views of solar limb activity\u003c\/li\u003e\n\u003cli\u003eAll-in-one, electronically heated etalon design for on-band stability\u003c\/li\u003e\n\u003cli\u003eInstalls directly into the Questar optical path for a seamless fit\u003c\/li\u003e\n\u003cli\u003ePowered by a standard USB connection (power supply not included)\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\u003eDaystar Quark for Questar Prominence Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark for Questar brings modern, electronically-heated Hydrogen-alpha filtering to the legendary Questar telescope. This all-in-one unit contains a Fabry-Pérot etalon, telecentric optics, and thermal regulation systems in a single device that installs directly into the Questar's optical path. The Prominence model is specifically designed to deliver the brightest, highest-contrast views of eruptive solar activity happening at the edge of the Sun.\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\u003eInstant H-alpha Astronomy for Your Questar Telescope\u003c\/h3\u003e\n\u003cp\u003eTurn your classic Questar into a sophisticated solar observing instrument without a complex and expensive component stack. The Quark is an integrated solution that replaces the standard eyepiece holder, providing a simple and elegant way to witness the dynamic solar atmosphere in the specific wavelength of Hydrogen-alpha light.\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\u003eOptimized for Solar Prominences: High-Contrast Limb Detail\u003c\/h3\u003e\n\u003cp\u003eThis \"Prominence\" version of the Quark is engineered with a slightly wider H-alpha bandpass compared to its \"Chromosphere\" counterpart. This design choice results in a brighter image and boosts the contrast of faint structures against the blackness of space, making it the ideal choice for observing solar flares, erupting prominences, and delicate plasma loops extending from the solar limb.\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\u003eIntegrated Design: A Seamless Fit for the Questar Optical Path\u003c\/h3\u003e\n\u003cp\u003eUnlike generic solar filters, the Quark for Questar is custom-built to work with the specific optical and mechanical properties of the Questar telescope. It threads directly into the telescope, ensuring proper focus, optical alignment, and a secure connection. This purpose-built design eliminates the compatibility issues and optical compromises that can arise from adapting universal filters to this unique instrument.\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\u003eQuark Prominence vs. Chromosphere: Choosing the Right Filter for Your Goals\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two variants of the Quark to suit different observing priorities. Understanding the trade-off is key to selecting the right one for you.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromosphere Model Advantage:\u003c\/strong\u003e A Chromosphere Quark has a narrower bandpass. This increases contrast on the Sun's disk, revealing finer detail in surface features like filaments, plage, and granulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminence Model Advantage:\u003c\/strong\u003e The Prominence Quark's wider bandpass produces a brighter image that excels at showing faint, wispy detail in prominences against the dark sky. While surface detail is still visible, it is optimized for activity at the solar limb.\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\"\u003eWhat makes the Daystar Quark for Questar different from a standard Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Quark for Questar is specifically designed to integrate mechanically and optically with the Questar telescope. It features custom threading and housing to fit directly into the Questar's rear port, ensuring a secure fit and correct focal position without the need for adapters or modifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an Energy Rejection Filter (ERF) with the Quark for Questar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. To prevent focused heat from damaging the internal components of your Questar telescope and the Quark filter itself, a full-aperture Energy Rejection Filter (ERF) must be placed over the front of the telescope. Operating the Quark without a properly installed ERF can cause permanent damage to your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Daystar Quark for Questar Prominence model show a large solar flare?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Prominence model is ideal for this scenario. Its design prioritizes image brightness and contrast at the solar limb. A large solar flare will appear as a brilliant, sharply-defined eruption against the black background of space, allowing you to observe its structure and evolution with exceptional clarity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quark for Questar on other telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this version is purpose-built for the Questar telescope only. Its specific threading and optical placement are not compatible with standard refractors, SCTs, or other telescope designs. Daystar produces other Quark models for use with different instruments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I want to see fine granulation on the Sun's surface with my Questar, is this the right Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Prominence model will show some surface detail, it is not optimized for it. For prioritizing fine surface features like granulation and the intricate structure of filaments, the \u003cstrong\u003eDaystar Quark Chromosphere\u003c\/strong\u003e model would be the better choice. Its narrower bandpass increases contrast on the solar disk at the expense of some prominence brightness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat power source does the Daystar Quark for Questar require to operate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Quark is electronically heated and requires a stable power source to maintain its on-band wavelength. It is powered via a standard USB port and requires a power supply (such as a wall adapter or portable battery pack) capable of delivering sufficient amperage. Please consult the product manual for the specific power requirements.\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\u003eSpecifications\u003c\/td\u003e\n\u003ctd\u003eNot available for this product.\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\"\u003eBox contents not available for this product.\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\/Daystar_Filters_Questar_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967455326493,"sku":"DAY-DSZQP","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quark-Questar-1__51586.1597184522.1280.1280.jpg?v=1684342416"},{"product_id":"daystar-sodium-quark-solar-filter","title":"Daystar Sodium Quark Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eObserves the Sodium D-Line at 5890 Å\u003c\/li\u003e\n\u003cli\u003eBandpass of approximately 0.3-0.5 Angstroms\u003c\/li\u003e\n\u003cli\u003eIntegrated 4.2X Telecentric Barlow Lens\u003c\/li\u003e\n\u003cli\u003eDesigned for F\/4 to F\/9 Refracting Telescopes\u003c\/li\u003e\n\u003cli\u003eAll-in-one, eyepiece-sized solar filter\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\u003eDaystar Sodium Quark Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Sodium Quark Solar Filter isolates the brilliant 5890 Å Sodium D-line with a bandpass of approximately 0.3-0.5 angstroms, revealing high-contrast details across the solar photosphere. This all-in-one unit integrates a custom 4.2X telecentric Barlow lens, making it fully optimized for any refracting telescope with a focal ratio between F\/4 and F\/9. The result is a simple, eyepiece-sized device that delivers sharp, flat-field views of sunspots, plage, and granulation with significantly shorter exposure times than other narrowband wavelengths.\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\u003eHigh-Contrast Solar Details at the 5890 Å Sodium D-Line\u003c\/h3\u003e\n\u003cp\u003eThe Sodium D-line offers a unique and intensely bright window into the Sun's photosphere. With the Sodium Quark's sub-angstrom bandpass, you can resolve fine sunspot structure, bright patches of plage, and the textured pattern of solar granulation. Under excellent seeing conditions, even the larger super-granulation cells may become visible, alongside the flare footprints known as flare kernels.\u003c\/p\u003e\n\u003cp\u003eBecause the Sodium D-line is brighter than both Calcium and Hydrogen-alpha, visual observation is easier and imaging exposures are dramatically shorter. This allows you to capture fleeting moments of excellent seeing and freeze atmospheric turbulence for sharper results, revealing dynamic features that are often washed out at other wavelengths.\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\u003eIntegrated 4.2X Telecentric Barlow for F\/4-F\/9 Refractors\u003c\/h3\u003e\n\u003cp\u003eDaystar's \"All-In-One\" design eliminates the complexity of traditional solar filter setups by combining a Fabry-Perot etalon and a fully optimized 4.2X telecentric barlow into a single, compact unit. This design ensures the filter receives the parallel light beam it needs to perform correctly, regardless of your refractor's native focal length, as long as it falls within the F\/4 to F\/9 range. The custom telecentric optics also ensure a uniformly illuminated and sharp, flat field from edge to edge.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Operation:\u003c\/strong\u003e Just insert the Sodium Quark into your 1.25\" or 2\" diagonal, add an eyepiece, and you are ready to observe. No complex adapters or spacing calculations are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Design:\u003c\/strong\u003e The compact, eyepiece-sized form factor eliminates unnecessary weight and components, making it easy to balance on any mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn-Axis Use Only:\u003c\/strong\u003e This filter is engineered for on-axis use in refracting telescopes and is not suitable for off-axis solar scopes or other designs.\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\u003eSodium vs. H-alpha: Why the 5890 Å Line is Brighter\u003c\/h3\u003e\n\u003cp\u003eWhile Hydrogen-alpha filters are the standard for viewing the chromosphere and dramatic prominences on the solar limb, the Sodium Quark targets the photosphere with a key advantage: brightness. The light emitted at the 5890 Å Sodium D-line is inherently more intense than the 6563 Å H-alpha line.\u003c\/p\u003e\n\u003cp\u003eThis increased brightness translates directly into shorter camera exposures and an easier visual experience, reducing eye strain during long observing sessions. While an H-alpha filter is necessary for limb detail, the Sodium Quark excels at delivering high-contrast, high-resolution views of features on the solar disk itself, like the intricate details within sunspot umbra and penumbra.\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 solar features can I see with the Daystar Sodium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Sodium Quark is designed to reveal features in the Sun's \u003cstrong\u003ephotosphere\u003c\/strong\u003e. You can expect to see high-resolution details in \u003cstrong\u003esunspots\u003c\/strong\u003e, bright areas of \u003cstrong\u003eplage\u003c\/strong\u003e, and the convection cells of \u003cstrong\u003egranulation\u003c\/strong\u003e. Under steady seeing, larger \u003cstrong\u003esuper-granulation\u003c\/strong\u003e patterns and the base of solar flares (\u003cstrong\u003eflare kernels\u003c\/strong\u003e) may also be visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the Sodium Quark different from a Hydrogen-alpha Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThey view different layers of the Sun. An \u003cstrong\u003eH-alpha Quark\u003c\/strong\u003e shows the \u003cstrong\u003echromosphere\u003c\/strong\u003e, famous for solar prominences, filaments, and surface texture. The \u003cstrong\u003eSodium Quark\u003c\/strong\u003e shows the deeper \u003cstrong\u003ephotosphere\u003c\/strong\u003e at the 5890 Å wavelength, which is better for sunspot detail and granulation. The Sodium view is also significantly brighter, allowing for shorter imaging exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill my 80mm f\/6 refractor work well with the Sodium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, perfectly. The Sodium Quark is optimized for any refractor with a focal ratio between \u003cstrong\u003eF\/4 and F\/9\u003c\/strong\u003e. An 80mm f\/6 refractor falls right in that range and will provide excellent views. You do not need any additional optical correctors; simply insert the Quark into your diagonal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate energy rejection filter (ERF) with the Sodium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor refractors under 80mm of aperture, typically no front-mounted ERF is required for visual use. For refractors over 80mm, or for any imaging application, a front-mounted UV\/IR cut filter or a dedicated ERF is strongly recommended to reduce heat entering the telescope and the Quark itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Sodium Quark show solar flares compared to an H-alpha filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn H-alpha filter shows the entire structure of a solar flare as it erupts into the chromosphere. The Sodium Quark shows the \"flare footprints\" or \u003cstrong\u003eflare kernels\u003c\/strong\u003e on the photosphere. These are the intensely bright, compact points at the base of the magnetic loops where the flare originates, offering a different perspective on the event's energy release.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat power supply does the Daystar Sodium Quark use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark requires a 5V DC power source to heat its internal etalon to the precise operating temperature. The product description notes that its low power consumption allows it to run all day from a small, palm-sized \u003cstrong\u003eoptional battery pack\u003c\/strong\u003e. A standard power adapter is not listed as an included accessory.\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\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003eSodium D-Line (5890 Å)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.3 - 0.5 Angstroms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Barlow\u003c\/td\u003e\n\u003ctd\u003e4.2x Telecentric Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Telescope Type\u003c\/td\u003e\n\u003ctd\u003eRefractors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Focal Ratio\u003c\/td\u003e\n\u003ctd\u003eF\/4 - F\/9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Application\u003c\/td\u003e\n\u003ctd\u003eOn-axis only (not for off-axis use)\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\"\u003eDaystar Sodium Quark Solar 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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Daystar_Filters_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967456833821,"sku":"DAY-DSZSD","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Sodium-Quark-DSZSD-1__67412.1597176316.1280.1280.jpg?v=1684342420"},{"product_id":"daystar-magnesium-quark-solar-filter","title":"Daystar Magnesium Quark Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eObserve the unique Magnesium I (Mg I) solar spectral line\u003c\/li\u003e\n\u003cli\u003eAll-in-one design fits standard 1.25\" diagonals\u003c\/li\u003e\n\u003cli\u003eIntegrated 4.2X telecentric Barlow lens for superior field flatness\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/4 to F\/9 refractors\u003c\/li\u003e\n\u003cli\u003eUSB-powered for convenient field use\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\u003eDaystar Magnesium Quark Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Magnesium Quark Solar Filter brings the unique Mg I b2 spectral line to your refractor in a single, eyepiece-sized unit. It incorporates a fully optimized, integrated 4.2X telecentric Barlow lens to ensure a flat field of view across a wide range of refractor focal ratios from f\/4 to f\/9. This all-in-one design simplifies high-resolution solar observing by eliminating complex adapters, and its USB power input allows for extended sessions in the field.\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\u003eObserving the Sun in Magnesium I: A Unique Chromospheric View\u003c\/h3\u003e\n\u003cp\u003eWhile Hydrogen-alpha reveals dramatic prominences and active regions, the Magnesium I line offers a different perspective on the sun's chromosphere. This wavelength is ideal for studying the quiet sun, revealing intricate details in plage (bright patches) and the chromospheric network that are often more subtle or invisible in H-alpha. The view is a unique window into the temperature and density structure of the solar atmosphere just above the photosphere.\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\u003eAll-in-One Design with Integrated 4.2X Telecentric Optics\u003c\/h3\u003e\n\u003cp\u003eDaystar has engineered the Magnesium Quark for ultimate simplicity and optical purity. The unit contains a custom 4.2X telecentric Barlow lens that is fully optimized for the Fabry-Perot etalon, ensuring superior field flatness and eliminating the need for additional components. You simply insert the Quark into your 1.25\" diagonal, add an eyepiece, and begin observing without worrying about complex configurations.\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\u003eUSB-Powered for Field Use with Standard 1.25\" Connectivity\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability, the Magnesium Quark is powered via a standard USB 5v, 1.5amp connection, allowing it to run all day from a small, palm-sized battery pack (sold separately). The housing fits any standard 1.25\" eyepiece drawtube and features a brass compression ring to protect your eyepieces from scratches. While it has a 1.25\" output, optional accessories are available for use with 2\" eyepieces or SCT rear threads.\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\u003eMagnesium Quark vs. Hydrogen-Alpha: What You See Differently\u003c\/h3\u003e\n\u003cp\u003eChoosing between solar filters depends on your observing goals. The Magnesium Quark and a Hydrogen-alpha filter show you two different layers and phenomena in the sun's dynamic atmosphere.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium I (Mg I):\u003c\/strong\u003e Excels at showing fine, low-contrast detail in the lower-to-mid chromosphere. It is the preferred wavelength for observing the structure of plage and the quiet-sun network. It does not show prominences or filaments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha (H-alpha):\u003c\/strong\u003e The classic choice for high-contrast, dynamic events. H-alpha is unmatched for viewing solar prominences erupting from the limb, dark filaments snaking across the disk, and the dramatic structure of active regions around sunspots.\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\"\u003eWhat solar features can I see with the Daystar Magnesium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Magnesium Quark is designed to reveal features in the sun's lower chromosphere. You can expect to see \u003cstrong\u003eplage\u003c\/strong\u003e (bright areas), the fine, web-like \u003cstrong\u003echromospheric network\u003c\/strong\u003e, and details in and around sunspots that are distinct from other wavelengths.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is required for the Daystar Magnesium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Magnesium Quark is optimized for use with refracting telescopes with focal ratios between \u003cstrong\u003ef\/4 and f\/9\u003c\/strong\u003e. It is not suitable for off-axis use on reflector or Schmidt-Cassegrain telescopes. For safe operation, your refractor must be fitted with a front-mounted UV\/IR cut filter or a full-aperture Energy Rejection Filter (ERF).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an Energy Rejection Filter (ERF) with the Daystar Magnesium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, absolutely.\u003c\/strong\u003e For any refractor, a full-aperture UV\/IR cut filter or a dedicated Energy Rejection Filter (ERF) must be placed on the front of the telescope. This prevents focused heat and UV radiation from damaging the Quark's internal components and is essential for safe solar observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Daystar Magnesium Quark in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark uses a standard USB power connection (5v, 1.5amp). It includes a wall adapter, but for field use, it can be powered all day by a small, portable USB power bank, similar to one you would use to charge a smartphone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Magnesium Quark on my 8\" SCT to see chromospheric details?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Daystar Magnesium Quark is designed specifically for use with refracting telescopes and is not suited for off-axis applications on reflectors or SCTs. Using it on an SCT would not produce an even, on-band image and would expose the filter to concentrated heat, risking damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Daystar Magnesium Quark show prominences on the solar limb with my 102mm f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Solar prominences are best observed in the Hydrogen-alpha spectral line. The Magnesium I wavelength observed by this Quark does not show prominences. Its strength lies in revealing different structures on the solar disk itself, such as plage and the chromospheric network.\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\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003eMagnesium I (Mg I) b2 line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003eApproximately 0.3-0.5 Å FWHM (etalon dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelecentric Barlow\u003c\/td\u003e\n\u003ctd\u003eIntegrated 4.2X, fully optimized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Focal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4 - f\/9 Refractors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" Nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" with brass compression ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003eUSB 5v, 1.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication Note\u003c\/td\u003e\n\u003ctd\u003eNot suited for off-axis applications\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\"\u003eDaystar Magnesium Quark Solar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e90-240VAC Wall Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInternational Plug Adapters\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTwist-Case for Storage\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\/Daystar_Filters_Magnesium_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967457128733,"sku":"DAY-DSZMG","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Magnesium-Quark-DSZMG-1__08874.1597176103.1280.1280.jpg?v=1684342425"},{"product_id":"daystar-calcium-quark-solar-filter","title":"Daystar Calcium Quark Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTargets the 3968.5Å Calcium H-line Wavelength\u003c\/li\u003e\n\u003cli\u003eAll-in-One Eyepiece-Style Solar Filter\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/7 to F\/30 Refractor Telescopes\u003c\/li\u003e\n\u003cli\u003eIntegrated 25mm Blocking Filter\u003c\/li\u003e\n\u003cli\u003eUSB Powered (5V, 1.5A) for Field Use\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\u003eDaystar Calcium Quark Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Calcium Quark Solar Filter is an all-in-one eyepiece-style filter that brings the Sun's upper chromosphere into view at the 3968.5Å wavelength. Designed for refractors with focal ratios of F\/7 or longer, this unit integrates a Fabry-Perot etalon with an approximate 5Å bandpass and a 25mm blocking filter into a single 1.25\" device. It operates on standard 5V, 1.5A USB power, making it simple to deploy for detailed views of solar plage and supergranulation.\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\u003eCalcium H-Line Views at 3968.5Å: Seeing the Upper Chromosphere\u003c\/h3\u003e\n\u003cp\u003eDaystar specifically chose the Calcium H-line (3968.5Å) for this Quark to maximize visual accessibility. While the nearby K-line provides similar scientific data for imagers, its shorter wavelength is invisible to many experienced observers. The H-line offers the same high-contrast views of the upper chromosphere but at a wavelength most people can see, revealing bright plage surrounding sunspots and the intricate network of supergranulation cells across the solar disk.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for Visual Use:\u003c\/strong\u003e The Calcium H-line wavelength is more easily perceived by the human eye than the shorter K-line, opening up this dynamic solar layer to more observers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e~5Å Bandpass:\u003c\/strong\u003e The approximate 5Å Full-Width Half-Maximum (FWHM) bandpass is ideal for highlighting the high-contrast structures in the upper chromosphere without being overly restrictive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Coatings:\u003c\/strong\u003e Anti-reflective coatings are optimized for the 397nm wavelength, and internal baffles are added to maximize contrast and reveal subtle solar details.\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\u003eAll-in-One Design for F\/7-F\/30 Refractors\u003c\/h3\u003e\n\u003cp\u003eThe Quark's integrated design simplifies what was once a complex and expensive setup. By combining the etalon, adapters, and a 25mm blocking filter into a single eyepiece-sized housing, it eliminates compatibility issues and reduces weight. This system is engineered to perform best with refractors in the F\/7 to F\/30 focal ratio range, dropping directly into your 1.25\" diagonal for immediate use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope Compatibility:\u003c\/strong\u003e Optimized for refractors F\/7 and longer. For shorter focal ratio refractors, a 2x or 2.5x Tele Vue Powermate is required to bring the scope into the Quark's optimal performance range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Safety:\u003c\/strong\u003e The unit contains a 25mm blocking filter with a 21mm clear aperture. For maximum safety, Daystar recommends the use of a front-mounted UV\/IR cut filter on your telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eERF Note:\u003c\/strong\u003e The Calcium Quark is not compatible with red or yellow glass Energy Rejection Filters (ERFs). A UV\/IR cut filter is the correct accessory.\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\u003eUSB-Powered for All-Day Sessions: 5V, 1.5A Operation\u003c\/h3\u003e\n\u003cp\u003eThis filter's heating system, which is crucial for tuning the etalon to the precise 3968.5Å wavelength, runs on a standard 5V, 1.5A USB power source. This low power consumption allows you to run the Quark all day from the included universal AC wall adapter or a small, optional palm-sized USB battery pack for ultimate portability in the field. The 1.25\" barrel features a brass compression ring to securely hold your eyepiece without marring its surface.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Power:\u003c\/strong\u003e The included 90-240VAC adapter comes with international plugs, ensuring you can power the Quark anywhere.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField-Ready:\u003c\/strong\u003e Its ability to run off a common USB power bank frees you from needing AC power at your observing site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Storage:\u003c\/strong\u003e Every Calcium Quark ships in a durable, dust-free Twist-Case to protect the precision optics during transport and storage.\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\"\u003eWhy does the Daystar Quark use Calcium H-line instead of K-line?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDaystar chose the \u003cstrong\u003eCalcium H-line (3968.5Å)\u003c\/strong\u003e because it is more easily visible to a wider range of observers, particularly those with more life-long observing experience. The shorter wavelength of the K-line can be difficult or impossible for some people to see. The H-line provides virtually identical high-contrast views of chromospheric features like plage and supergranulation, ensuring more people can enjoy the view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill my fast f\/5 refractor work with the Daystar Calcium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNot directly. The Calcium Quark is optimized for telescopes with a focal ratio of \u003cstrong\u003eF\/7 to F\/30\u003c\/strong\u003e. To use it with a faster telescope like an f\/5 refractor, you must use a Barlow-type lens to slow the light cone. Daystar recommends a \u003cstrong\u003e2x or 2.5x Tele Vue Powermate\u003c\/strong\u003e placed before the Quark to achieve the best performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Daystar Calcium Quark in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Calcium Quark runs on standard \u003cstrong\u003eUSB power (5V, 1.5A)\u003c\/strong\u003e. While it includes a 90-240VAC wall adapter for home use, its low power draw makes it ideal for field use with a portable USB battery pack. An optional 8-hour battery pack is available, but any standard power bank that meets the 5V, 1.5A requirement will work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need any other filters with the Calcium Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. For safety, Daystar strongly recommends using a \u003cstrong\u003efront-mounted UV\/IR cut filter\u003c\/strong\u003e on your telescope's objective. This prevents excess heat from entering your telescope and the Quark. It is critical to note that the Calcium Quark is \u003cstrong\u003eNOT compatible with red or yellow glass Energy Rejection Filters (ERFs)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat solar features can I see with the Calcium Quark on a 100mm f\/9 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 100mm f\/9 refractor is an excellent match for the Calcium Quark. You can expect to see detailed views of the Sun's upper chromosphere, which appears very different from Hydrogen-alpha. Key features visible in Calcium H-line include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlage:\u003c\/strong\u003e Bright, active regions that often surround sunspot groups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupergranulation:\u003c\/strong\u003e A network of large-scale convection cells that cover the entire solar disk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunspots:\u003c\/strong\u003e The umbra and penumbra of sunspots are visible, often with surrounding bright plage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlares:\u003c\/strong\u003e Very bright, eruptive events can sometimes be witnessed in this wavelength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Calcium Quark include a built-in Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Daystar Calcium Quark does not contain any Barlow or focusing elements. It is a dedicated filtering device. You will use your own eyepieces for magnification and your telescope's focuser to achieve a sharp image.\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\u003eCalcium H-line \"Eyepiece\" Quark\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e3968.5Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd\u003eApproximately 5Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eHeated Fabry-Perot Etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Telescope Type\u003c\/td\u003e\n\u003ctd\u003eRefractors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Focal Ratio\u003c\/td\u003e\n\u003ctd\u003eF\/7 - F\/30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eIntegrated 25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e21mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Barrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Holder\u003c\/td\u003e\n\u003ctd\u003eBrass Compression Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003eUSB 5V, 1.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Power Adapter\u003c\/td\u003e\n\u003ctd\u003e90-240VAC Wall Adapter w\/ International Plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVendor Part Number\u003c\/td\u003e\n\u003ctd\u003eCALCIUM QUARK\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\"\u003eDaystar Calcium Quark Solar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e90-240VAC USB Power Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInternational Plug Set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTwist-Case Storage Container\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\/Daystar_Filters_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967457194269,"sku":"DAY-DSZCH","price":1813.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Calcium-Quark-DSZCH-1__84784.1597175942.1280.1280.jpg?v=1684342409"},{"product_id":"daystar-quantum-h-alpha-solar-filter","title":"Daystar Quantum H-alpha Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBandpass options from 0.8Å down to 0.3Å for specific solar targets\u003c\/li\u003e\n\u003cli\u003eLive LCD readout of the precise wavelength output, accurate to 0.1Å\u003c\/li\u003e\n\u003cli\u003eRed\/blue push-button wing shifting for observing Doppler events\u003c\/li\u003e\n\u003cli\u003eOperates on 12VDC power for field use and includes a serial port for computer control\u003c\/li\u003e\n\u003cli\u003eAvailable in Standard (SE) and Professional (PE) grades for different research needs\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\u003eDaystar Quantum H-alpha Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quantum H-alpha Solar Filter is an electronically-tuned etalon for dedicated solar observation, offering bandpass options from a wider 0.8Å to an ultra-narrow 0.3Å. Its precision housing provides a live LCD readout of the filter's output with 0.1Å accuracy and includes red\/blue wing-shift buttons for detailed Doppler studies of solar phenomena. Designed for simple plug-and-play operation on refractors, SCTs, and Maksutovs, a green light indicates when the filter is perfectly on-band and ready for observation.\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\u003eBandpass Options from 0.8Å to 0.3Å\u003c\/h3\u003e\n\u003cp\u003eThe Quantum filter is available in a range of bandpasses, allowing you to select the ideal instrument for your observing goals. Wider options like 0.7Å or 0.8Å deliver brighter views of solar prominences erupting from the limb, while narrower bandpasses of 0.4Å or 0.3Å provide the highest contrast for resolving fine details in the chromosphere, such as spicules and filamentary structure.\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\u003ePrecision Wavelength Tuning with 0.1Å Accuracy\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Quantum's design is its digital control system. A live LCD readout displays the exact wavelength being transmitted with an accuracy of 0.1Å, removing any guesswork. For advanced analysis, red and blue wing-shift buttons allow you to precisely tune the wavelength off the central H-alpha line, enabling the study of Doppler-shifted features like CMEs and other active regions moving toward or away from you.\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\u003eSE vs. PE Grades: Choosing Your Filter Homogeneity\u003c\/h3\u003e\n\u003cp\u003eDaystar offers the Quantum filter in two distinct grades to match specific application requirements. The choice between them depends on the required level of on-band transmittance uniformity across the filter's surface.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantum SE (Standard Edition):\u003c\/strong\u003e Designed for most amateur and academic applications, the SE grade meets Daystar's critical quality control standards for visual observation and many photographic uses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantum PE (Professional Edition):\u003c\/strong\u003e Intended for professional research where precise homogeneity is paramount, the PE grade undergoes additional quality control steps and testing to ensure the highest uniformity and on-band transmittance values across the entire substrate.\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\u003e12VDC Power and Serial Computer Control\u003c\/h3\u003e\n\u003cp\u003eEngineered for both field and observatory use, the Quantum filter operates on 12VDC power. Each unit includes a 100-240V power supply with adapter plates for US, UK, European, and Australian outlets. A built-in serial port enables full computer control, allowing for remote operation and an on-screen display of the filter's wavelength readout for research and automated imaging sessions.\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 Daystar Quantum bandpass is best for prominences vs. surface detail?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor observing prominences, a wider bandpass like \u003cstrong\u003e0.7Å or 0.8Å\u003c\/strong\u003e is often preferred as it produces a brighter image of these structures against the blackness of space. For high-contrast views of surface details like filaments, plages, and spicules, a narrower bandpass like \u003cstrong\u003e0.5Å, 0.4Å, or 0.3Å\u003c\/strong\u003e is superior, as it rejects more off-band light from the photosphere.\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 Daystar Quantum SE and PE grades?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the uniformity of the filter's performance across its surface. The \u003cstrong\u003eQuantum SE (Standard Edition)\u003c\/strong\u003e is ideal for visual astronomy and general imaging. The \u003cstrong\u003eQuantum PE (Professional Edition)\u003c\/strong\u003e undergoes more rigorous testing to guarantee precision homogeneity and on-band transmittance, making it the choice for professional research applications where scientific-grade data is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Daystar Quantum filter's wing-shifting feature?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe red and blue buttons on the Quantum housing allow you to tune the filter slightly off the central H-alpha wavelength. This is used for observing Doppler-shifted phenomena. For example, a solar flare moving rapidly toward Earth will have its light shifted toward the blue end of the spectrum. Pressing the blue button tunes the filter to that wavelength, making the feature more visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quantum H-alpha filter on my 11\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Daystar Quantum filter is designed for use on Schmidt-Cassegrains, Maksutovs, and refractors. However, any telescope with an aperture over 80mm used for solar viewing requires an energy rejection filter (ERF) to be placed over the front of the telescope to prevent heat buildup and potential damage to the instrument and the filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat power supply do I need for the Daystar Quantum filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Quantum filter operates on \u003cstrong\u003e12VDC\u003c\/strong\u003e. It includes a universal 100-240V AC adapter with interchangeable wall plates for international use, allowing you to power it from a standard wall outlet. For field use, it can be powered by a portable 12V battery pack.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the computer control feature on the Daystar Quantum filter work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter includes a serial port that allows you to connect it to a computer. Using Daystar's Quantum Control software, you can manage the filter's wavelength tuning remotely. This is especially useful for automated imaging sequences, remote observatories, or for displaying and logging the precise wavelength data during scientific research.\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\u003e0.8Å, 0.7Å, 0.6Å, 0.5Å, 0.4Å, 0.3Å\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\/Daystar_Filters_Quantum_Serial_Protocol_V1.2_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\"\u003eDownload 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:\/\/www.daystarfilters.com\/downloads\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"0.8Å \/ PE","offer_id":44967459455261,"sku":"DAY-.8QPE","price":16786.0,"currency_code":"CAD","in_stock":true},{"title":"0.7Å \/ PE","offer_id":44967459488029,"sku":"DAY-.7QPE","price":19586.0,"currency_code":"CAD","in_stock":true},{"title":"0.6Å \/ PE","offer_id":44967459520797,"sku":"DAY-.6QPE","price":25186.0,"currency_code":"CAD","in_stock":true},{"title":"0.5Å \/ PE","offer_id":44967459553565,"sku":"DAY-.5QPE","price":30786.0,"currency_code":"CAD","in_stock":true},{"title":"0.4Å \/ PE","offer_id":44967459586333,"sku":"DAY-.4QPE","price":39186.0,"currency_code":"CAD","in_stock":true},{"title":"0.3Å \/ PE","offer_id":44967459619101,"sku":"DAY-.3QPE","price":50386.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quantum-H-alpha-Solar-Filter-1__47848.1597170747.1280.1280.jpg?v=1684342459"},{"product_id":"daystar-quantum-calcium-ii-h-line-solar-filter-5a-pe-grade","title":"Daystar Quantum Calcium II H-Line Solar Filter - 5Å PE Grade","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTargets the Calcium II H-Line Emission\u003c\/li\u003e\n\u003cli\u003eOptimized for Visual and Imaging Use\u003c\/li\u003e\n\u003cli\u003eReveals Lower Chromospheric Detail\u003c\/li\u003e\n\u003cli\u003eProduces a High-Contrast Violet Image\u003c\/li\u003e\n\u003cli\u003eProfessional (PE) Grade Optical System\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\u003eDaystar Quantum Calcium II H-Line Solar Filter - 5Å PE Grade\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quantum Calcium II H-Line Solar Filter is engineered for observers who want to visually experience the sun's lower chromosphere. By specifically targeting the Calcium H-line, this filter produces a higher contrast and more easily visible violet image than traditional K-line filters, making it a superior choice for direct observation and advanced imaging.\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\u003eA Visual-First Approach to Calcium Solar Observing\u003c\/h3\u003e\n\u003cp\u003eWhile most academic solar research has focused on the Calcium K-line, that wavelength is deep in the ultraviolet spectrum and extremely difficult for the human eye to perceive. Daystar's H-Line filter targets a different emission line of Calcium that is significantly closer to the visible spectrum, resulting in a bright, high-contrast violet view that is far easier to focus and observe directly through the eyepiece.\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\u003eHigh-Contrast Views of the Lower Chromosphere\u003c\/h3\u003e\n\u003cp\u003eThis filter opens a window into the dynamic lower layers of the solar atmosphere, revealing details invisible in white light or Hydrogen-alpha. You can observe the bright, complex magnetic regions known as plage that surround sunspot groups, track the boundaries of supergranulation cells across the solar disk, and witness the energetic brightening that precedes a solar flare.\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\u003eCalcium H-Line vs. K-Line: A Comparison for Observers\u003c\/h3\u003e\n\u003cp\u003eThe choice between a Calcium H-line and K-line filter comes down to your primary application: research or visual astronomy.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium K-Line:\u003c\/strong\u003e This is the traditional choice for university-level research. Its wavelength is well-isolated from other spectral lines, providing clean data for academic studies. However, its deep-UV nature makes it almost impossible to use visually.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium H-Line (This Filter):\u003c\/strong\u003e This filter is designed for the amateur astronomer. By shifting to a wavelength much closer to what the eye can see, it makes direct visual observation of the chromosphere possible and highly rewarding. The view is still a deep violet, but one that your eye can readily focus on, revealing solar features in real-time.\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\"\u003eWhat solar features can I see with the Daystar Quantum Calcium II H-Line filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Quantum Calcium II H-Line filter reveals features in the sun's lower chromosphere. You will be able to see \u003cstrong\u003ebright plage\u003c\/strong\u003e (active regions around sunspots), the network pattern of \u003cstrong\u003esupergranulation cells\u003c\/strong\u003e, and \u003cstrong\u003epre-flare brightening\u003c\/strong\u003e in magnetically complex areas.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I choose this Calcium H-Line filter over a K-Line filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should choose the H-Line filter if you have any interest in \u003cstrong\u003evisual observation\u003c\/strong\u003e. The K-line wavelength is too deep in the ultraviolet for the human eye to see effectively. The H-line is much closer to the visible spectrum, producing a distinct violet image that is significantly easier to see and focus through an eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Daystar Quantum filter better for visual observing or imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is designed to excel at both. However, its primary advantage over traditional K-line filters is its superior performance for \u003cstrong\u003evisual observation\u003c\/strong\u003e. For imagers, the more visible wavelength can also make achieving sharp focus easier before starting a capture sequence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Daystar Quantum Calcium II H-Line filter show a large sunspot group with my 100mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the sunspots themselves will appear as dark umbra (similar to white light), the Daystar Quantum Calcium II H-Line filter will reveal the extensive, bright, and detailed plage surrounding the spot group. This highlights the intense magnetic activity below the surface, which is completely invisible without a specialized filter like this one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Daystar Quantum Calcium II H-Line filter a good choice for my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Quantum series is a robust filtering system suitable for many telescope designs, including Schmidt-Cassegrains. The brighter, more visible image produced by the H-line can be an advantage on long focal-ratio instruments like SCTs, potentially allowing for shorter exposure times during imaging compared to K-line systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat color is the sun through the Daystar Quantum Calcium II H-Line filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe sun will appear as a \u003cstrong\u003ehigh-contrast, deep violet\u003c\/strong\u003e image. This color is the natural result of isolating the specific Calcium H-line emission. While deep, this particular shade of violet is much easier for the human eye to perceive than the light from a K-line filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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:\/\/www.daystarfilters.com\/downloads\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967464698141,"sku":"DAY-CH5AUNI","price":19586.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quantum-Calcium-II-Solar-Filter-CH5AUNI__53954.1597170543.1280.1280.jpg?v=1684342497"},{"product_id":"daystar-quantum-calcium-ii-k-solar-filter-2a-pe-grade","title":"Daystar Quantum Calcium II K Solar Filter - 2Å PE Grade","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTargets the Calcium II K-line at 393.3nm\u003c\/li\u003e\n\u003cli\u003e2Å Bandpass for high-contrast chromospheric detail\u003c\/li\u003e\n\u003cli\u003ePE (Professional Edition) Grade for research applications\u003c\/li\u003e\n\u003cli\u003eQuantum electronic controls provide 0.1Å tuning precision\u003c\/li\u003e\n\u003cli\u003eOptimized for CCD photography and scientific analysis\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\u003eDaystar Quantum Calcium II K Solar Filter - 2Å PE Grade\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quantum Calcium II K Solar Filter isolates the solar chromosphere at the 393.3nm K-line with a 2Å bandpass, making it a dedicated instrument for academic research and advanced CCD imaging. Its Quantum control system allows for precision wing-shifting accurate to 0.1Å, enabling detailed studies of the solar atmosphere's three-dimensional structure.\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\u003eA Research Tool for the Sun's Chromosphere: 2Å at the 393.3nm K-Line\u003c\/h3\u003e\n\u003cp\u003eThis PE (Professional Edition) grade filter is engineered for university-level research into the composition and dynamics of the Sun. The 2Å bandpass centered on the 393.3nm Calcium K absorption line reveals high-contrast details in the lower to mid-chromosphere, such as supergranulation cells and the magnetic structure around sunspots.\u003c\/p\u003e\n\u003cp\u003eUnlike broadband white-light filters, a narrow Ca K filter provides a distinct view into a specific atmospheric layer. The PE grade ensures the highest level of uniformity across the filter, which is critical for producing scientific-quality data and flat-fielded images free of artifacts.\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\u003e0.1Å Precision Tuning: Mapping Atmospheric Layers with Quantum Controls\u003c\/h3\u003e\n\u003cp\u003eThe integrated Quantum electronic tuning system is the filter's core analytical function. By allowing you to shift the filter's central wavelength with an accuracy of 0.1Å, you can precisely measure Doppler effects and map different levels of the chromosphere. This capability is essential for studying velocity fields and the intensity differences between the K1, K2, and K3 components of the Calcium line.\u003c\/p\u003e\n\u003cp\u003eThis level of control transforms the filter from a simple viewing instrument into a scientific tool. You can investigate the subordinate peaks within the Ca II K line, effectively looking through different depths of the solar atmosphere to build a three-dimensional understanding of chromospheric structures.\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\u003eK-Line vs. H-Line: Why the 393.3nm Wavelength is Optimized for CCDs\u003c\/h3\u003e\n\u003cp\u003eCalcium has two strong spectral lines: the K-line at 393.3nm and the H-line at 396.9nm. This filter targets the K-line, which has historically been the standard for academic research because it is well-isolated from other spectral lines. However, at 393.3nm, the light is deep into the violet part of the spectrum, very close to where human vision ends around 400nm.\u003c\/p\u003e\n\u003cp\u003eThis presents a critical trade-off: the Daystar Calcium K filter is exceptionally well-suited for monochrome CCD or CMOS cameras, which are highly sensitive at this wavelength. For direct visual observation, the image will appear very dim and low-contrast. The H-line is visually brighter, but for the highest clarity in scientific imaging, the K-line remains the preferred target.\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 Daystar Quantum Calcium II K filter primarily used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a specialized, research-grade solar filter designed for \u003cstrong\u003eacademic studies and advanced CCD imaging\u003c\/strong\u003e of the Sun's chromosphere. Its primary application is isolating the Calcium K-line at 393.3nm to study features like supergranulation, plage, and the magnetic networks around sunspots.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Calcium K-line at 393.3nm difficult to see visually with this filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe human eye's sensitivity drops off sharply below 400nm. The \u003cstrong\u003e393.3nm wavelength\u003c\/strong\u003e of the Calcium K-line is so deep in the violet spectrum that it appears very dim and lacks contrast to our eyes. Modern imaging sensors, however, have excellent sensitivity at this wavelength, making this an ideal filter for photography but challenging for visual use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 0.1Å wing-shifting of the Quantum controls allow me to study?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.1Å precision tuning\u003c\/strong\u003e allows you to study Doppler-shifted phenomena on the Sun. By shifting the filter's bandpass off the central K-line, you can visualize solar material moving towards you (blue-shifted) or away from you (red-shifted). This is critical for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVelocity Field Mapping:\u003c\/strong\u003e Studying the motion of plasma in active regions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D Chromosphere Analysis:\u003c\/strong\u003e Observing different depths of the solar atmosphere by targeting the K1, K2, and K3 peaks of the Ca II line profile.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quantum Calcium II K filter for general solar viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is not recommended for general or casual solar viewing. It is a highly specialized scientific instrument. For general visual observation of sunspots, you should use a white-light filter. For prominences and surface detail, a Hydrogen-alpha filter is the standard choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 2Å bandpass of this filter help when imaging supergranulation cells on the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003e2Å bandpass\u003c\/strong\u003e is wide enough to show significant contrast in the chromospheric network, where supergranulation cells are most prominent. This bandwidth provides a bright image while still being narrow enough to isolate the key Calcium K features, making the boundaries of these large-scale convection cells stand out clearly in images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I am trying to study Doppler shifts in a solar flare with this Calcium K filter, how would I use the Quantum controls?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo study a solar flare, you would first tune the filter to the central \u003cstrong\u003e393.3nm wavelength\u003c\/strong\u003e to image the event. Then, using the \u003cstrong\u003e0.1Å precision\u003c\/strong\u003e of the Quantum controls, you would tune slightly towards blue (e.g., -0.5Å) to capture material being ejected towards you, and then slightly towards red (e.g., +0.5Å) to capture material falling back. Comparing these images reveals the flare's velocity structure and dynamics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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:\/\/www.daystarfilters.com\/downloads\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967464763677,"sku":"DAY-CK2AUNI","price":25186.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quantum-Calcium-II-Solar-Filter-CK2AUNI__24810.1597170337.1280.1280.jpg?v=1684342499"},{"product_id":"daystar-quantum-helium-d3-solar-filter-0-3a-pe-grade","title":"Daystar Quantum Helium D3 Solar Filter - 0.3Å PE Grade","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eObserves in the rare Helium D3 line at 5875.61Å\u003c\/li\u003e\n\u003cli\u003eUltra-narrow 0.3Å bandpass for maximizing contrast\u003c\/li\u003e\n\u003cli\u003eProfessional Edition (PE) grade for research-level precision\u003c\/li\u003e\n\u003cli\u003eReveals unique solar phenomena including flare footprints and magnetic lines\u003c\/li\u003e\n\u003cli\u003eEnables direct observation of a line previously studied only indirectly\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\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\u003eDaystar Quantum Helium D3 Solar Filter - 0.3Å PE Grade\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quantum Helium D3 Solar Filter makes observation of the 5875.61Å emission line possible, a feat of optical engineering previously unavailable to researchers and advanced observers. This Professional Edition (PE) grade filter uses an ultra-narrow 0.3Å bandpass to isolate the elusive wavelength, which was first identified during the solar eclipse of 1868. By achieving the extreme tuning accuracy required to capture this line, the Quantum He D3 filter opens a new, dynamic window into the solar chromosphere.\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 the Chromosphere at 5875.61Å\u003c\/h3\u003e\n\u003cp\u003eFor the first time, you can directly view solar phenomena in the light of Helium D3. Located near the Sodium D1 and D2 lines, the He D3 line at 5875.61Å has historically been a challenge to isolate, with past research relying on indirect 'overlappogram' methods. Daystar's Quantum He D3 is the only filter on the market that places this wavelength directly in your eyepiece or on your imaging sensor, enabling novel studies of solar physics.\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\u003eA 0.3Å Bandpass for High-Contrast Solar Features\u003c\/h3\u003e\n\u003cp\u003eThe filter's extremely narrow 0.3Å bandpass is the key to revealing the subtle and energetic structures unique to this wavelength. By rejecting adjacent light from the solar continuum, the filter dramatically increases contrast on specific chromospheric targets. This allows you to observe features that are washed out in other wavelengths or in white light.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlare Research:\u003c\/strong\u003e See bright emission in flare footprints, tracing the points where energy is deposited into the lower chromosphere.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Structures:\u003c\/strong\u003e Observe dark absorption features that directly follow the Sun's complex magnetic field lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromospheric Detail:\u003c\/strong\u003e Clearly resolve supergranulation, plage, and fine sunspot details with enhanced contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminences:\u003c\/strong\u003e While H-alpha is superior for large prominences, smaller, hotter prominence structures can be visible in He D3.\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\u003ePE Grade Precision: Required for the 5875.61Å Line\u003c\/h3\u003e\n\u003cp\u003eIsolating the Helium D3 line demands extraordinary precision in the filter's central wavelength (CWL). For this reason, Daystar offers this filter exclusively in their Professional Edition (PE) grade. PE Grade filters are manufactured to a higher standard of uniformity and homogeneity across the entire aperture, ensuring that the 0.3Å bandpass is consistent from edge to edge for uncompromising, research-quality results.\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\u003eHelium D3 vs. Hydrogen-alpha: A New Observational Window\u003c\/h3\u003e\n\u003cp\u003eWhile Hydrogen-alpha at 6562.8Å remains the standard for viewing general chromospheric activity like filaments and large prominences, Helium D3 offers a complementary and highly specialized view. It is particularly sensitive to higher-energy events and provides a more direct look at the magnetic architecture of active regions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha's Advantage:\u003c\/strong\u003e Unmatched for viewing large, cool prominences against the blackness of space and long, dark filaments snaking across the solar disk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelium D3's Advantage:\u003c\/strong\u003e Excels at showing the immediate aftermath and footprint of solar flares and the intricate patterns of absorption that trace magnetic fields near active regions. For the advanced solar imager, adding He D3 data provides a more complete physical picture of solar events.\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\"\u003eWhat specific solar features can I see with the Daystar Quantum Helium D3 filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quantum Helium D3 filter is designed to reveal specific, high-energy, and magnetically influenced phenomena. You can expect to see \u003cstrong\u003esunspot detail, supergranulation, plage, bright emission in flare footprints,\u003c\/strong\u003e and \u003cstrong\u003edark absorption lines that follow the Sun's magnetic fields.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Daystar Helium D3 filter only available in PE grade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Helium D3 emission line at \u003cstrong\u003e5875.61Å\u003c\/strong\u003e is extremely narrow and difficult to isolate. It requires the highest level of precision in the filter's central wavelength accuracy. The \u003cstrong\u003eProfessional Edition (PE) grade\u003c\/strong\u003e ensures the strict manufacturing tolerances needed for research-quality uniformity and performance across the entire filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does observing with the Quantum Helium D3 filter compare to H-alpha?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThey are complementary. \u003cstrong\u003eH-alpha (6562.8Å)\u003c\/strong\u003e is superior for general chromosphere viewing, showing large prominences and filaments. The \u003cstrong\u003eHelium D3 filter\u003c\/strong\u003e provides a specialized view of higher-energy events, making it ideal for studying flare impacts and the structure of solar magnetic fields, which are less distinct in H-alpha.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quantum Helium D3 filter on my 100mm f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Daystar Quantum filters are designed to work with a variety of telescopes, but they require the host telescope to operate at approximately f\/30. For an f\/7 refractor, you would need a 4x telecentric Barlow lens (like a TeleVue PowerMate) placed before the filter to achieve the required focal ratio. You will also need a full-aperture Energy Rejection Filter (ERF) mounted on the front of your telescope for safe operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the significance of the Helium D3 line at 5875.61Å for solar research?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eObserving in He D3 provides insight into different physical conditions than other wavelengths. It is particularly sensitive to regions of higher temperature and density in the chromosphere, especially those associated with solar flares and active regions. This filter allows researchers to directly study the magnetic and energetic processes in these areas, which were previously difficult to observe.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Quantum Helium D3 filter require external power to operate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. All Daystar Quantum series filters are electronically controlled and heated to maintain a precise operating temperature for on-band performance. The filter requires a stable 12V DC power source to function correctly. This allows for precise tuning of the central wavelength via the included control box or software.\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\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003eHelium D3 (5875.61Å)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e0.3Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eProfessional Edition (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product listing is for the Daystar Quantum Helium D3 Solar Filter unit only. Power supply, cables, and telescope-specific adapters are not included.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967464861981,"sku":"DAY-HeD.3PE","price":25193.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quantum-Helium-D3-Solar-Filter__60923.1597164902.1280.1280.jpg?v=1684342501"},{"product_id":"daystar-quantum-sodium-d-solar-filter-0-4a-pe-grade","title":"Daystar Quantum Sodium D Solar Filter - 0.4Å PE Grade","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTargets the Sodium D emission line at 5895.9Å\u003c\/li\u003e\n\u003cli\u003eUltra-narrow 0.4Å bandpass for high-contrast views\u003c\/li\u003e\n\u003cli\u003eProfessional Edition (PE) grade for research applications\u003c\/li\u003e\n\u003cli\u003eEnables doppler velocity studies through controlled heating\u003c\/li\u003e\n\u003cli\u003eSuitable for both visual and photographic solar observation\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\u003eDaystar Quantum Sodium D Solar Filter - 0.4Å PE Grade\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quantum Sodium D Solar Filter isolates the bright 5895.9Å emission line with a research-grade 0.4Å bandpass, precisely isolating it from the solar continuum. This Professional Edition (PE) quantum filter is engineered for sub-angstrom studies of the lower chromosphere, revealing dynamic phenomena like granulation, supergranulation, and impulsive-phase flare kernels that are invisible in other wavelengths.\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 0.4Å Bandpass at the 5895.9Å Sodium D Line\u003c\/h3\u003e\n\u003cp\u003eIsolating the Sodium D line requires exceptional precision. While the line itself is very bright, it is also extremely narrow, and a bandpass of less than 0.5Å is necessary to separate its signal from the overwhelming glare of the continuum. This 0.4Å PE-grade filter achieves that separation, delivering high-contrast views of features driven by heating in the low chromosphere.\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\u003eVisualizing Granulation, Flares, and P-modes in the Lower Chromosphere\u003c\/h3\u003e\n\u003cp\u003eObserving in Sodium D provides a unique window into solar physics. The view reveals intricate details in granulation and supergranulation patterns across the solar disk. Because the Na D line is emitted when the low chromosphere is heated, it is particularly effective for identifying the footpoints of flux loops during a flare, pinpointing the eruption's origin point with clarity.\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\u003eHeated Dual-Line Observation for Professional Doppler Studies\u003c\/h3\u003e\n\u003cp\u003eThis Quantum filter is designed for advanced research, including doppler velocity imaging. Unheated, it operates on the lower of the two Na D emission lines. By applying heat, the filter's bandpass can be shifted to the higher line. By capturing images in each line and processing the difference, you can create a dopplergram that maps surface motions associated with supergranulation—a technique previously limited to professional observatories.\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\u003eSodium D vs. Calcium K: A Brighter View of Chromospheric Detail\u003c\/h3\u003e\n\u003cp\u003eFor observers familiar with Calcium K-line solar filters, the Sodium D line offers a similar type of view, particularly in its rendering of granulation. The critical advantage of the Sodium D line is its brightness. This makes the image significantly easier to see visually and allows for shorter photographic exposures, making it a more accessible and versatile tool for studying the chromosphere.\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 makes the Daystar Quantum Sodium D filter different from H-alpha?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar Quantum Sodium D filter targets the \u003cstrong\u003e5895.9Å wavelength\u003c\/strong\u003e, which reveals activity in the Sun's \u003cstrong\u003elower chromosphere\u003c\/strong\u003e. This is ideal for studying granulation and the heated footpoints of solar flares. H-alpha filters target the \u003cstrong\u003e6562.8Å wavelength\u003c\/strong\u003e, showing features higher up in the chromosphere like prominences, filaments, and surface texture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat specific solar features can I see with the 0.4Å Sodium D filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ultra-narrow \u003cstrong\u003e0.4Å bandpass\u003c\/strong\u003e is designed to show high-detail in specific phenomena originating in the lower chromosphere. You can expect to see:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGranulation and supergranulation:\u003c\/strong\u003e Convective cells across the solar surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP-modes:\u003c\/strong\u003e Solar oscillations visible as surface patterns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpulsive-phase flare kernels:\u003c\/strong\u003e The bright, initial footpoints of a solar flare eruption.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the heating function on the Quantum Sodium D filter work for doppler studies?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sodium D line is actually a doublet with two closely spaced emission lines. The Daystar Quantum filter is designed to operate \u003cstrong\u003eunheated\u003c\/strong\u003e on the lower line. By applying power and \u003cstrong\u003eheating\u003c\/strong\u003e the filter, you can precisely shift its transmission peak to the higher line. Capturing images in both states allows you to create dopplergrams to study solar surface velocities.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Daystar Quantum Sodium D filter suitable for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is designed for both photographic and visual use. A key advantage of observing in the Sodium D line compared to other narrow wavelengths like Calcium K is its brightness. This makes for a more comfortable and detailed visual experience, allowing you to see features like granulation directly through the eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the view of a solar flare's footpoints differ through this Sodium D filter versus an H-alpha filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sodium D filter excels at showing the very base of a flare, where energy heats the lower chromosphere. You would see these \"footpoints\" as intensely bright, compact kernels. In H-alpha, you would see the subsequent plasma eruption and the overarching magnetic loops of the flare higher in the chromosphere, but the initial origin points at the surface would be less distinct.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar Quantum Sodium D filter for observing anything besides the Sun, like the volcanoes on Io?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a known research application, but it requires a very large aperture telescope. The volcanic plumes of Jupiter's moon Io emit light in the Sodium D line. With a sufficiently large instrument, this filter can be used to isolate and image that faint emission against the dark sky, a task impossible with standard filters.\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\u003eQuantum Solar Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Wavelength\u003c\/td\u003e\n\u003ctd\u003eSodium D Line (5895.9Å)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e0.4Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eProfessional Edition (PE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003eSolar Chromosphere Observation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObserving Method\u003c\/td\u003e\n\u003ctd\u003eVisual and Photographic\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\"\u003eDaystar Quantum Sodium D Solar Filter - 0.4Å PE Grade\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:\/\/www.daystarfilters.com\/downloads\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":44967464927517,"sku":"DAY-NAD.4UNI","price":25186.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Quantum-Sodium-D-Solar-Filter__11147.1597164664.1280.1280.jpg?v=1684342503"},{"product_id":"daystar-energy-rejection-filter-for-refractor-80-150mm-erf-glass","title":"Daystar Energy Rejection Filter for Refractor - 80-150mm ERF Glass","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFull-aperture solar energy rejection filter for refractors\u003c\/li\u003e\n\u003cli\u003eAvailable in 80mm, 100mm, 130mm, and 150mm clear apertures\u003c\/li\u003e\n\u003cli\u003eRejects harmful UV and IR radiation to protect your downstream filter\u003c\/li\u003e\n\u003cli\u003eActs as an aperture mask to achieve the f\/30 focal ratio required by Daystar filters\u003c\/li\u003e\n\u003cli\u003eCustom-machined aluminum cell for a precise fit on your telescope's dew shield\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\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\u003eDaystar Energy Rejection Filter for Refractor - 80-150mm ERF Glass\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Energy Rejection Filter (ERF) is the essential first component for safe, high-resolution solar observation, available in apertures from 80mm to 150mm. This front-mounted filter protects your entire optical system by rejecting damaging UV and infrared energy before it enters your telescope. By managing the heat load and acting as a precise aperture mask, the ERF ensures your Daystar Quark or other filter assembly receives a light cone at the required f\/30 focal ratio for optimal contrast and uniformity.\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\u003eThermal Protection: Rejecting UV\/IR Heat Before the Etalon\u003c\/h3\u003e\n\u003cp\u003eA telescope is a light bucket, and when pointed at the sun, it also becomes a heat collector. The Daystar ERF is a specialized dielectric coated or colored glass filter that transmits the desired visible wavelengths while reflecting or absorbing concentrated ultraviolet and infrared radiation. Placing this protection at the front of your refractor prevents a dangerous buildup of heat inside the optical tube, safeguarding your expensive etalon and other internal components from thermal stress and potential damage.\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\u003eAchieving the Critical f\/30 Focal Ratio\u003c\/h3\u003e\n\u003cp\u003eDaystar's sub-angstrom filter assemblies demand a highly collimated beam of light to function correctly, operating best at a focal ratio of f\/30 or slower. The ERF serves a dual purpose by also acting as an aperture mask, stopping down your telescope's faster native focal ratio to this required value. This ensures the light entering the etalon is at a straight angle of incidence, which is critical for achieving a uniform, high-contrast image of the solar chromosphere across the entire field of view.\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\u003eCustom-Machined for a Secure Fit on Your Refractor\u003c\/h3\u003e\n\u003cp\u003eAn ERF must be securely mounted to the front of your telescope with no risk of slipping. Each Daystar ERF is housed in a custom-machined aluminum cell and cap assembly, built to order based on your specific telescope. To ensure a perfect fit, you must provide the precise outside diameter of your refractor's dew shield at the time of order. This made-to-order approach guarantees a safe, stable platform for your solar observing sessions.\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 Daystar ERF for refractors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Daystar ERF has two main functions. First, it acts as a pre-filter, rejecting harmful and heat-inducing Ultraviolet (UV) and Infrared (IR) light before it enters the telescope. Second, it serves as an aperture mask to slow your telescope's optical system to the \u003cstrong\u003ef\/30 focal ratio\u003c\/strong\u003e required for optimal performance with Daystar's H-alpha filter systems like the Quark.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is an f\/30 focal ratio required for the Daystar ERF and Quark filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Fabry-Pérot etalon inside a Daystar filter is extremely sensitive to the angle of incoming light. An f\/30 light cone is highly collimated (the light rays are nearly parallel), which allows the etalon to maintain its narrow bandpass uniformly across the entire field of view. Using a faster focal ratio would result in a significant loss of contrast and detail in solar features like filaments and prominences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I determine the correct size Daystar ERF for my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need to provide the exact outside diameter of your telescope's dew shield, measured with a ruler or calipers. Daystar will custom-machine the filter cell for a snug, secure fit based on this measurement. Failing to provide an accurate measurement will delay your order. You should also choose an ERF glass size appropriate for your desired aperture; for high-resolution imaging, a larger ERF is generally preferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a Daystar ERF with a telescope larger than 150mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile these specific ERF models go up to 150mm, Daystar does make larger custom filters. However, for apertures above 150mm, heat management becomes a significant engineering challenge. The ERF serves to stop down the aperture to create the f\/30 beam, so a 150mm ERF can be used on a larger telescope, but it will limit the working aperture to 150mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 100mm Daystar ERF work for imaging prominences on my 120mm f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it will work perfectly. The 100mm ERF will act as an aperture mask, effectively turning your 120mm f\/7 telescope into a 100mm f\/8.4 system (840mm \/ 100mm). You would then use a Barlow lens to bring the final focal ratio to f\/30 or slower. The 100mm aperture is excellent for capturing detailed views of both surface granulation and prominences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat happens if I don't provide my dew shield measurement when ordering the Daystar ERF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYour order will be placed on hold. These filters are custom-machined on a per-order basis, and production cannot begin without the precise outside diameter of your telescope's dew shield. Providing this measurement in your order notes is critical to avoid delays.\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\u003eFront-mounted Energy Rejection Filter (ERF) for solar observing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003eRefractors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Configurations\u003c\/td\u003e\n\u003ctd\u003e\n80mm ERF Glass | Cell | 110mm ID Cap\u003cbr\u003e\n80mm ERF Glass | Cell | 120mm ID Cap\u003cbr\u003e\n100mm ERF Glass | Cell | 120mm ID Cap\u003cbr\u003e\n100mm ERF Glass | Cell | 130mm ID Cap\u003cbr\u003e\n100mm ERF Glass | Cell | 140mm ID Cap\u003cbr\u003e\n100mm ERF Glass | Cell | 150mm ID Cap\u003cbr\u003e\n130mm ERF Glass | Cell | 150mm ID Cap\u003cbr\u003e\n130mm ERF Glass | Cell | 160mm ID Cap\u003cbr\u003e\n130mm ERF Glass | Cell | 170mm ID Cap\u003cbr\u003e\n130mm ERF Glass | Cell | 180mm ID Cap\u003cbr\u003e\n130mm ERF Glass | Cell | 190mm ID Cap\u003cbr\u003e\n150mm ERF Glass | Cell | 180mm ID Cap\u003cbr\u003e\n150mm ERF Glass | Cell | 190mm ID Cap\u003cbr\u003e\n150mm ERF Glass | Cell | 200mm ID Cap\u003cbr\u003e\n150mm ERF Glass | Cell | 210mm ID Cap\u003cbr\u003e\n150mm ERF Glass | Cell | 220mm ID Cap\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Focal Ratio\u003c\/td\u003e\n\u003ctd\u003eOptimized for use in an f\/30 or slower light cone\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\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"80mm ERF Glass | Cell | 120mm ID Cap","offer_id":44967466336541,"sku":"DAY-E-120N80","price":770.0,"currency_code":"CAD","in_stock":true},{"title":"100mm ERF Glass | Cell | 130mm ID Cap","offer_id":44967466369309,"sku":"DAY-E-130N100","price":973.0,"currency_code":"CAD","in_stock":true},{"title":"100mm ERF Glass | Cell | 140mm ID Cap","offer_id":44967466402077,"sku":"DAY-E-140N100","price":973.0,"currency_code":"CAD","in_stock":true},{"title":"100mm ERF Glass | Cell | 150mm ID Cap","offer_id":44967466434845,"sku":"DAY-E-150N100","price":973.0,"currency_code":"CAD","in_stock":true},{"title":"130mm ERF Glass | Cell | 160mm ID Cap","offer_id":44967466467613,"sku":"DAY-E-160N130","price":1393.0,"currency_code":"CAD","in_stock":true},{"title":"130mm ERF Glass | Cell | 170mm ID Cap","offer_id":44967466500381,"sku":"DAY-E-170N130","price":1393.0,"currency_code":"CAD","in_stock":true},{"title":"130mm ERF Glass | Cell | 180mm ID Cap","offer_id":44967466533149,"sku":"DAY-E-180N130","price":1393.0,"currency_code":"CAD","in_stock":true},{"title":"130mm ERF Glass | Cell | 190mm ID Cap","offer_id":44967466565917,"sku":"DAY-E-190N130","price":1393.0,"currency_code":"CAD","in_stock":true},{"title":"150mm ERF Glass | Cell | 190mm ID Cap","offer_id":44967466598685,"sku":"DAY-E-190N150","price":2303.0,"currency_code":"CAD","in_stock":true},{"title":"150mm ERF Glass | Cell | 200mm ID Cap","offer_id":44967466631453,"sku":"DAY-E-200N150","price":2303.0,"currency_code":"CAD","in_stock":true},{"title":"150mm ERF Glass | Cell | 210mm ID Cap","offer_id":44967466664221,"sku":"DAY-E-210N150","price":2303.0,"currency_code":"CAD","in_stock":true},{"title":"150mm ERF Glass | Cell | 220mm ID Cap","offer_id":44967466696989,"sku":"DAY-E-220N150","price":2303.0,"currency_code":"CAD","in_stock":true},{"title":"80mm ERF Glass | Cell | 110mm ID Cap","offer_id":44967466729757,"sku":"DAY-E-110N80","price":770.0,"currency_code":"CAD","in_stock":true},{"title":"100mm ERF Glass | Cell | 120mm ID Cap","offer_id":44967466795293,"sku":"DAY-E-120N100","price":973.0,"currency_code":"CAD","in_stock":true},{"title":"130mm ERF Glass | Cell | 150mm ID Cap","offer_id":44967466828061,"sku":"DAY-E-150N130","price":1393.0,"currency_code":"CAD","in_stock":true},{"title":"150mm ERF Glass | Cell | 180mm ID Cap","offer_id":44967466860829,"sku":"DAY-E-180N150","price":2303.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Energy-Rejection-Filter-Refractor__11211.1597120973.1280.1280.jpg?v=1684342518"},{"product_id":"daystar-energy-rejection-filter-for-sct-63-125mm-off-axis-erf-glass","title":"Daystar Energy Rejection Filter for SCT - 63-125mm Off-Axis ERF Glass","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOff-axis energy rejection filter (ERF) for Schmidt-Cassegrain Telescopes\u003c\/li\u003e\n\u003cli\u003eSafely isolates a smaller aperture for high-contrast solar viewing\u003c\/li\u003e\n\u003cli\u003eAvailable in apertures from 63mm to 125mm\u003c\/li\u003e\n\u003cli\u003eMounting cells fit telescope tubes from 244mm to 460mm in diameter\u003c\/li\u003e\n\u003cli\u003eRequired for using Daystar Quark filters on any SCT\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\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\u003eDaystar Energy Rejection Filter for SCT - 63-125mm Off-Axis ERF Glass\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Energy Rejection Filter (ERF) for SCTs provides a safe, high-contrast solution for hydrogen-alpha solar observation with Schmidt-Cassegrain telescopes. This system uses an off-axis glass filter, available in sizes from 63mm to 125mm, mounted in a cell and cap assembly designed to fit tubes with outer diameters from 244mm to 460mm. By rejecting harmful heat and unfocused light before it enters the optical tube, the Daystar ERF protects your telescope's secondary mirror and internal baffles while dramatically improving the view through a downstream Daystar Quark or other narrow-band solar filter.\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\u003eOff-Axis Energy Rejection: Safe Solar Imaging for SCTs\u003c\/h3\u003e\n\u003cp\u003eUsing an SCT for solar observation without an ERF concentrates immense heat on the secondary mirror and internal components, risking permanent damage. The Daystar Off-Axis ERF solves this by placing a high-quality filter over a sub-aperture of the corrector plate. This approach allows only the light from a 63mm to 125mm portion of the primary mirror to enter the telescope, effectively stopping the instrument down while keeping the vast majority of solar energy outside the tube entirely.\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\u003eEnhanced H-alpha Contrast: Protecting Your Quark from SCT Heat\u003c\/h3\u003e\n\u003cp\u003eAn ERF is not just for safety; it is critical for image contrast in H-alpha. Internal tube currents and heat build-up inside an unfiltered SCT degrade seeing and reduce the visibility of fine solar details like prominences and surface granulation. The Daystar ERF ensures the light reaching your Daystar Quark is cool and stable, allowing the etalon to perform optimally without thermal interference.\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\u003eSizing Your ERF: Matching 63mm to 125mm Filters to Your SCT\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct model requires measuring the outer diameter (OD) of your telescope's front cell or tube. Daystar offers seven options with specific inside cap diameters (ID) ranging from 244mm to 460mm to ensure a secure fit. For example, the 244mm ID cap holds a 63mm ERF, while the 460mm ID cap is designed for a 125mm ERF, providing an appropriate sub-aperture for the largest SCTs.\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\u003eOff-Axis vs. Full-Aperture ERFs: A Critical Choice for SCT Owners\u003c\/h3\u003e\n\u003cp\u003eWhile a full-aperture ERF offers the maximum possible resolution, it is often prohibitively expensive and heavy for large SCTs. The Daystar Off-Axis ERF provides a practical and effective alternative.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-Axis ERF (This Product):\u003c\/strong\u003e Cost-effective, lightweight, and significantly safer than using no front filter. It provides a generous aperture (e.g., 125mm on a 14-inch SCT) that delivers excellent resolution on solar details while protecting the entire optical system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Aperture ERF:\u003c\/strong\u003e Delivers the full resolution of your telescope's primary mirror but at a substantially higher cost, weight, and mounting complexity. For most visual and imaging applications with an SCT, the performance gains do not justify the trade-offs compared to a properly sized off-axis filter.\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\"\u003eWhy is a Daystar ERF required for my SCT with a Daystar Quark?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor any Schmidt-Cassegrain telescope larger than 80mm, a front-mounted Energy Rejection Filter is mandatory for safety. The SCT design concentrates a huge amount of solar energy onto the secondary mirror, which can quickly overheat and be destroyed. The Daystar ERF blocks this energy before it enters the telescope, protecting your equipment and improving image contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right size Daystar Off-Axis ERF for my Celestron 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must physically measure the outer diameter of the front of your telescope tube, including the retaining ring, to determine the correct cap size. An 8\" SCT typically has an outer diameter around 230-240mm. Based on the options, the \u003cstrong\u003e244mm ID Cap\u003c\/strong\u003e with the 63mm ERF would likely be the correct choice. Always measure your specific telescope before ordering to ensure a proper fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Daystar ERF for white light solar viewing by itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Daystar ERF is \u003cstrong\u003enot a standalone solar filter\u003c\/strong\u003e and is not safe for visual or photographic use on its own. It is designed to be used only with a secondary, narrow-bandpass filter like a Daystar Quark or Quantum. For white light viewing, you need a dedicated white light solar filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the off-axis design of this Daystar ERF affect resolution on solar granulation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe off-axis placement creates an unobstructed aperture, similar to a refractor, which can actually improve contrast on fine details like solar granulation by eliminating the diffraction effects of a central obstruction. While a full-aperture filter would use the entire mirror, a 100mm or 125mm off-axis ERF still provides more than enough resolution to clearly see granulation and spicules under good seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between this SCT-specific ERF and a regular ERF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis product is a complete assembly that includes the ERF glass, a mounting cell, and a friction-fit cap sized for the outer diameter of common SCTs. A regular or \"OEM\" ERF is typically just the glass filter itself, intended for custom mounting by the user in a refractor or other optical system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Daystar ERF cell and cap on my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is straightforward. The cap is designed for a secure friction fit over the front of the telescope tube. Simply slide the entire assembly over the front of the SCT until it is snug. Ensure it is firmly in place before pointing the telescope at the Sun.\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\u003eOff-Axis Energy Rejection Filter (ERF) for SCTs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable ERF Apertures\u003c\/td\u003e\n\u003ctd\u003e63mm, 80mm, 90mm, 100mm, 115mm, 125mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Cap Inner Diameters\u003c\/td\u003e\n\u003ctd\u003e244mm, 281mm, 311mm, 356mm, 410mm, 460mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eRequired for H-alpha solar observing with Daystar Quark filters on SCTs over 80mm\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\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"63mm ERF Glass | Cell | 244mm ID Cap","offer_id":44967467155741,"sku":"DAY-E-244F63","price":770.0,"currency_code":"CAD","in_stock":true},{"title":"80mm ERF Glass | Cell | 281mm ID Cap","offer_id":44967467188509,"sku":"DAY-E-281F80","price":770.0,"currency_code":"CAD","in_stock":true},{"title":"80mm ERF Glass | Cell | 311mm ID Cap","offer_id":44967467221277,"sku":"DAY-E-311F80","price":770.0,"currency_code":"CAD","in_stock":true},{"title":"90mm ERF Glass | Cell | 311mm ID Cap","offer_id":44967467254045,"sku":"DAY-E-325F90","price":973.0,"currency_code":"CAD","in_stock":true},{"title":"100mm ERF Glass | Cell | 356mm ID Cap","offer_id":44967467286813,"sku":"DAY-E-356F100","price":1253.0,"currency_code":"CAD","in_stock":true},{"title":"115mm ERF Glass | Cell | 410mm ID Cap","offer_id":44967467319581,"sku":"DAY-E-410F115","price":1673.0,"currency_code":"CAD","in_stock":true},{"title":"125mm ERF Glass | Cell | 460mm ID Cap","offer_id":44967467352349,"sku":"DAY-E-460F125","price":1673.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Daystar-Off-Axis-Energy-Rejection-Filter-SCT__26806.1597120943.1280.1280.jpg?v=1684342521"},{"product_id":"lunt-internal-double-stack-small-format-ls80mt-ls80thapt-ls100mt","title":"Lunt Internal Double Stack Small Format - LS80MT, LS80THaPT \u0026 LS100MT","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInternal double-stack module with new-generation etalon\u003c\/li\u003e\n\u003cli\u003eCompatible with Lunt LS80MT, LS80THaPT \u0026amp; LS100MT telescopes\u003c\/li\u003e\n\u003cli\u003eDramatically increases chromospheric contrast for fine solar details\u003c\/li\u003e\n\u003cli\u003eUser-installable design requires no factory return\u003c\/li\u003e\n\u003cli\u003eFeatures dual independent Doppler True tuning knobs\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\u003eLunt Internal Double Stack Small Format (SFPT) Module\u003c\/h2\u003e\n\u003cp\u003eThe Lunt Internal Double Stack Small Format (SFPT) module adds a second, internal etalon to your LS80MT, LS80THaPT, or LS100MT telescope, unlocking a significant increase in solar surface contrast. This user-installable upgrade transforms textured solar features into sharply defined structures, revealing the complex, multi-strand architecture of filaments and the full magnetic complexity of active regions. Dual independent Doppler True tuning knobs provide precise, independent control over each etalon, allowing you to optimize the view for any feature on the sun's dynamic chromosphere.\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 SFPT Double-Stack Advantage: Unlocking Chromospheric Detail\u003c\/h3\u003e\n\u003cp\u003eBy adding a second etalon inside the telescope, the SFPT module dramatically narrows the bandpass of the optical system. The improvement in chromospheric contrast is immediate, revealing a level of detail that single-stack systems at this aperture cannot resolve. What previously appeared as simple texture separates into discrete, high-contrast structure.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilaments and Prominences:\u003c\/strong\u003e Dark filaments resolve into complex, multi-strand architectures, while prominences show internal threading and flow patterns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Detail:\u003c\/strong\u003e Plage boundaries sharpen into defined cellular networks, and the intricate magnetic structure of active regions becomes fully visible.\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\u003eUser-Installable Design for LS80MT, LS80THaPT \u0026amp; LS100MT\u003c\/h3\u003e\n\u003cp\u003eThe SFPT module is engineered for straightforward installation by you, eliminating the need for a costly and time-consuming factory return. This design choice makes the double-stack upgrade a flexible investment that can be made at the time of telescope purchase or at any point in the future. Because the module fits entirely inside the main telescope body, it does not alter the instrument's external dimensions, balance, or its capability for nighttime observing.\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\u003ePrecision Control: Dual Independent Doppler True Tuning\u003c\/h3\u003e\n\u003cp\u003eThis module includes two separate Doppler True tuning knobs, one for the telescope's primary etalon and one for the new internal etalon. This dual-control system is critical for achieving optimal contrast across the entire solar disk. You can independently adjust each etalon to suppress Doppler-shifted light from different solar features, ensuring you can dial in the highest possible contrast for any target, from limb prominences to surface granulation.\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 main benefit of adding the Lunt SFPT Double Stack module to my LS80MT or LS100MT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is a \u003cstrong\u003edramatic increase in solar surface contrast\u003c\/strong\u003e. The second etalon narrows the system's light bandpass, which makes faint chromospheric details like filaments, plage, and the complex structure within active regions significantly more visible and sharply defined.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to send my Lunt telescope back to the factory to install the SFPT module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Lunt SFPT module is specifically designed to be \u003cstrong\u003euser-installable\u003c\/strong\u003e. This allows you to upgrade your telescope at your convenience without the downtime and expense of shipping it back to the manufacturer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SFPT module affect viewing prominences versus surface detail on the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile a single-stack system is excellent for prominences, the narrower bandpass of a double-stack system excels at revealing fine \u003cstrong\u003esurface detail\u003c\/strong\u003e. With the SFPT installed, you will see significantly more structure in filaments, active regions, and plage. The dual tuning knobs allow you to adjust the view to optimize for either prominences or surface features, though the greatest improvement is seen on the surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy are there two tuning knobs on the Lunt SFPT Double Stack module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two knobs provide \u003cstrong\u003eindependent Doppler True tuning\u003c\/strong\u003e for each etalon (the original one in your scope and the new one in the SFPT module). This allows you to precisely shift the bandpass of each filter separately to achieve the highest possible contrast on any solar feature, compensating for Doppler-shifted light from different areas of the sun.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill adding the SFPT module change the balance or nighttime use of my Lunt Universal Telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Because the SFPT is an \u003cstrong\u003einternal module\u003c\/strong\u003e, it does not change the telescope's external dimensions, weight distribution, or balance. Your Lunt Universal Telescope remains fully capable for nighttime deep-sky or planetary observing without needing to remove the module.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt SFPT module to see more detail in a solar filament near an active region?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is a scenario where the SFPT excels. The enhanced contrast will make the dark, multi-strand structure of the filament stand out sharply against the bright chromosphere, and you'll be able to see the complex magnetic webbing of the surrounding active region with much greater clarity than in a single-stack view.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eDSII\/SFPTP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product is an internal module and does not ship with separate accessories.\u003c\/p\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\/Lunt_Solar_Systems_DSII_SFPT_Internal_Double_Stack_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\"\u003eDownload 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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967532593437,"sku":"LSS-DSII\/SFPTP","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-Double-Stack-Module-LS80MT-LS100MT-1.jpg?v=1769116433"},{"product_id":"lunt-50mm-double-stack-module-ls50tha","title":"Lunt 50mm Double Stack Module - LS50THa","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDouble-Stack Filter for LS50THa Telescopes\u003c\/li\u003e\n\u003cli\u003eDramatically Increases Chromospheric Contrast\u003c\/li\u003e\n\u003cli\u003eReveals Fine Detail in Filaments and Prominences\u003c\/li\u003e\n\u003cli\u003eCompact, Lightweight Design Preserves Portability\u003c\/li\u003e\n\u003cli\u003eTool-Free, Front-Mount Installation\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\u003eLunt 50mm Double Stack Module - LS50THa\u003c\/h2\u003e\n      \u003cp\u003eThe Lunt 50mm LS50C Double Stack Module is the factory-designed etalon upgrade for the Lunt LS50THa 50mm solar telescope. This compact, front-mounted filter adds a second, precisely tuned etalon to the optical path, significantly narrowing the system's bandpass. The result is a dramatic increase in chromospheric contrast, transforming surface textures into resolved, high-fidelity structures.\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\u003eDouble-Stacking the 50mm Lunt: Unlocking High-Contrast Detail\u003c\/h3\u003e\n      \u003cp\u003eBy adding a second etalon, the LS50C module substantially boosts the contrast of solar features against the bright chromosphere. This enhancement is immediately visible, revealing complex details that are subtle or invisible in a single-stack system. The upgrade allows you to resolve the multi-strand architecture and dark cores of filaments, see internal threading within prominences, and clearly separate active plage regions from the surrounding surface.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Views:\u003c\/strong\u003e The narrower bandpass darkens the solar disk, making bright features like filaments and plage stand out with striking clarity.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eVerified Etalons:\u003c\/strong\u003e Each new-generation etalon is individually tested and verified on precision metrology equipment to ensure it meets Lunt's stringent specifications.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTilt-Tuned Mechanism:\u003c\/strong\u003e A fine-tuning knob allows you to tilt the etalon, shifting the bandpass slightly to optimize the view for different features across the solar disk.\u003c\/li\u003e\n      \u003c\/ul\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\u003eLS50C Design: A Compact, Tool-Free Upgrade for the LS50THa\u003c\/h3\u003e\n      \u003cp\u003eThe LS50C is engineered to maintain the portable, \"grab-and-go\" nature of the LS50THa telescope. It threads directly onto the front of the optical tube in seconds without requiring any tools or a return trip to the factory. This seamless integration ensures your compact solar setup remains lightweight and easy to manage on a photo tripod or small equatorial mount, making it the ideal high-contrast upgrade that doesn't sacrifice convenience.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLS50THa Specific:\u003c\/strong\u003e This module is designed exclusively for the Lunt LS50THa series of telescopes and is not intended for use with other models.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFront-Mount Filter:\u003c\/strong\u003e Attaches securely to the objective end of the telescope for quick installation and removal.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSafety Requirement:\u003c\/strong\u003e A Lunt blocking filter is required for safe operation. The LS50C is an etalon filter and cannot be used as a standalone solar filter.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Lunt LS50C Double Stack Module?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Lunt LS50C is an external etalon filter designed specifically for the \u003cstrong\u003eLunt LS50THa 50mm solar telescope\u003c\/strong\u003e. Its purpose is to \"double stack\" the system by adding a second filter, which narrows the final bandpass and dramatically increases the contrast of features on the Sun's chromosphere, such as filaments, prominences, and plage.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the LS50C on my LS50THa telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eInstallation is simple and requires no tools. The \u003cstrong\u003eLS50C Double Stack Module\u003c\/strong\u003e threads directly onto the front of your existing LS50THa telescope's objective lens cell. Simply unthread the dew shield\/sun shade, thread the LS50C on until it is snug, and then re-attach the dew shield to the front of the LS50C.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat specific visual improvements can I expect with the LS50C Double Stack Module on the Sun's surface?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou will see a significant increase in surface detail. Vague textures seen in a single-stack view will resolve into distinct structures. With the \u003cstrong\u003eLS50C module\u003c\/strong\u003e, you can expect to see:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eDarker, more defined cores within filaments.\u003c\/li\u003e\n      \u003cli\u003eFine, thread-like details inside prominences.\u003c\/li\u003e\n      \u003cli\u003eClear separation of bright plage regions from the background chromosphere.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt LS50C a standalone solar filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eNo, it is not.\u003c\/strong\u003e This is critically important for safety. The LS50C is an etalon filter only and must be used with a Lunt LS50THa telescope that contains a required Lunt blocking filter in the diagonal or focuser. Using the LS50C without a proper blocking filter will not protect your eyes and will result in permanent blindness.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill adding the LS50C make my LS50THa setup heavy or hard to balance?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The \u003cstrong\u003eLS50C\u003c\/strong\u003e is designed to be compact and lightweight specifically to preserve the portability of the LS50THa system. While it adds a small amount of weight to the front of the telescope, the total system remains manageable on Vixen-style mounts or even robust photo tripods, and re-balancing is typically straightforward.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Lunt LS50C work with any other Lunt telescopes?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis module, the LS50C, is made specifically for the \u003cstrong\u003eLunt LS50THa 50mm dedicated solar telescope series\u003c\/strong\u003e. It is not designed to be compatible with other Lunt telescope models or solar filters from other brands.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eLS50CP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eNo items are listed in the box for this module.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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\/Lunt_Solar_Systems_LS50THaPT_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eFor LS50THa Telescope\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967532921117,"sku":"LSS-LS50CP","price":1393.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LSS-LS50C.jpg?v=1770414042"},{"product_id":"lunt-internal-double-stack-module-for-ls152tha","title":"Lunt Internal Double Stack Module for LS152THa","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInternal double-stack module for select Lunt modular telescopes\u003c\/li\u003e\n\u003cli\u003eDramatically narrows the final system bandpass for maximum contrast\u003c\/li\u003e\n\u003cli\u003eReveals fine chromospheric detail on the solar disk\u003c\/li\u003e\n\u003cli\u003eUser-installable design requires no factory return\u003c\/li\u003e\n\u003cli\u003eFully reversible, does not affect nighttime telescope configuration\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\u003eLunt Internal Double Stack Module for LS152THa\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LFPT Internal Double Stack Module is the definitive high-contrast upgrade for Lunt's largest modular solar telescopes. By adding a second, new-generation etalon inside the optical path, this module narrows the system's final bandpass to an extremely fine level. This significant reduction in bandpass delivers the highest-contrast Hydrogen-alpha views possible, transforming the solar disk into a landscape of intricate, dynamic detail.\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 Internal Double-Stack Etalon: Maximum Solar Contrast\u003c\/h3\u003e\n\u003cp\u003eThe core of this module is a second, precision-tuned etalon designed to work in series with your telescope's primary etalon. This \"double stacking\" drastically reduces the amount of off-band light reaching the eyepiece, which darkens the solar background and makes faint structures on the chromosphere stand out in bold relief. Each etalon is individually tested and verified on precision metrology equipment to ensure it meets its design specifications.\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\u003eResearch-Grade Chromosphere: Resolving Plage and Network Structure\u003c\/h3\u003e\n\u003cp\u003eWith the extreme bandpass reduction of the LFPT module, the Sun's chromosphere becomes a subject of genuine scientific study. The increase in contrast moves beyond simple prominences to reveal the complex magnetic architecture of active regions. You can resolve the fine internal organization of bright plage, trace the delicate threads of filaments against the disk, and resolve individual elements of the intergranular network.\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\u003eA Reversible Upgrade for Lunt Modular Telescopes\u003c\/h3\u003e\n\u003cp\u003eThis module is engineered for straightforward user installation, eliminating the need to send your telescope back to the factory for an upgrade. It can be purchased with a new telescope or added at any time, making it a flexible investment in your solar observing. The upgrade is also fully reversible; once the internal solar module is removed for nighttime use, the telescope performs exactly as it did before installation.\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\u003eSingle vs. Double-Stack: Visualizing the High-Contrast Advantage\u003c\/h3\u003e\n\u003cp\u003eA standard single-stacked Lunt telescope provides excellent views of solar prominences, which are bright features seen against the blackness of space. However, seeing faint details on the face of the Sun itself requires suppressing the overwhelming brightness of the chromosphere. This is the primary function of the double-stack module. By dramatically increasing contrast across the disk, it makes the intricate, low-contrast tapestry of filaments, plage, and active regions visible where they would otherwise be lost in the glare.\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 main visual difference after installing the Lunt Double Stack Module on my LS152THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is a dramatic increase in contrast on the surface of the Sun. While a single-stacked view is excellent for prominences at the Sun's edge, the \u003cstrong\u003eLunt Double Stack Module\u003c\/strong\u003e excels at revealing finer, lower-contrast details on the solar disk itself, such as filaments, plage, and the complex structure within active regions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to send my Lunt LS152THa telescope to the factory to install this module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Lunt LFPT Internal Double Stack Module is designed to be \u003cstrong\u003euser-installable\u003c\/strong\u003e. This allows you to upgrade your telescope at any time without the cost and downtime of shipping it for factory service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill adding the Lunt Internal Double Stack Module affect my LS130MT's performance for nighttime astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it will not. The internal module is part of the solar assembly. When you configure your Lunt modular telescope for nighttime use, the solar components are removed, and the telescope operates as a standard night-sky instrument with its original optical characteristics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a narrower bandpass better for viewing the Sun's surface with the Lunt Double Stack Module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sun's surface, or chromosphere, is incredibly bright. Faint details are easily lost in this glare. A narrower bandpass, achieved by \"double stacking\" etalons, rejects more of this off-band light. This darkens the view slightly but significantly boosts contrast, making subtle features visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see more detail in a large solar flare with the Lunt Double Stack Module on an LS152THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The enhanced contrast provided by the \u003cstrong\u003eLunt Double Stack Module\u003c\/strong\u003e is ideal for observing the complex, ribbon-like structures within a solar flare. While a single-stack system will show the event, the double-stack reveals finer details and the flare's connection to surrounding active regions on the solar disk more clearly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt Double Stack Module useful for imaging the Sun with my LS130MT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The high-contrast view is a major advantage for solar imagers. The \u003cstrong\u003eLunt Double Stack Module\u003c\/strong\u003e allows cameras to capture the same faint surface details that become visible to the eye, resulting in images with significantly more surface texture, filamentary detail, and active region complexity.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eDSII\/LS130T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003eLFPT\/LS152mm\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\"\u003eLunt Internal Double Stack Module (LFPT)\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\/Lunt_Solar_Systems_LS152THa_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\"\u003eDownload 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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967533347101,"sku":"LSS-DSII\/LS152TP","price":4193.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"lunt-50mm-ha-etalon-filter","title":"Lunt 50mm Ha Etalon Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Clear Aperture\u003c\/li\u003e\n\u003cli\u003eTilt-Tuned Hydrogen-Alpha Etalon\u003c\/li\u003e\n\u003cli\u003eVerified Bandpass of \u0026lt;0.4Å\u003c\/li\u003e\n\u003cli\u003eEnables \u0026lt;0.28Å Double-Stacking on LS60MT\u003c\/li\u003e\n\u003cli\u003eFront-Mount Filter Design\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\u003eLunt 50mm H-alpha Etalon Filter\u003c\/h2\u003e\n\u003cp\u003eThe Lunt 50mm Ha Etalon Filter is a 50mm aperture, front-mounted, tilt-tuned solar filter with a verified bandpass of less than 0.4Å. It is designed as a direct-fit double-stack upgrade for the Lunt LS60MT telescope, combining with the scope's internal 0.45Å etalon to achieve an ultra-narrow system bandpass of less than 0.28Å for maximum contrast on solar surface 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\u003eDouble-Stacking the LS60MT: Achieving a \u0026lt;0.28Å Bandpass\u003c\/h3\u003e\n\u003cp\u003eThis filter's primary purpose is to enhance the Lunt LS60MT Modular Telescope. By mounting the 50mm LS50FHa to the front of the LS60MT, its \u0026lt;0.4Å etalon is placed in series with the telescope's internal \u0026lt;0.45Å pressure-tuned etalon. This combination narrows the final bandpass to less than 0.28Å, dramatically increasing contrast and revealing fine structures within the Sun's chromosphere, such as filaments and active region plages, that are subtle or invisible in a single-etalon system. The upgrade is user-installable with no factory service required and is easily removed for nighttime astronomy.\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\u003eStandalone Solar Filter: A 50mm, \u0026lt;0.4Å Front Etalon for Refractors\u003c\/h3\u003e\n\u003cp\u003eBeyond the LS60MT, the LS50FHa can serve as a standalone 50mm H-alpha filter for a compatible, user-supplied refractor. The tilt-tuning mechanism allows you to shift the bandpass off the central H-alpha line, helping to highlight Doppler-shifted details like eruptive prominences. When used in this configuration, a crucial trade-off is the requirement for an appropriate Lunt blocking filter, which must be purchased separately and matched to your telescope's focal length to ensure safe viewing and proper system performance.\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 main advantage of double-stacking my Lunt LS60MT with the LS50FHa filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDouble-stacking your LS60MT with the \u003cstrong\u003eLunt 50mm Ha Etalon Filter\u003c\/strong\u003e narrows the system's bandpass from ~0.45Å to under 0.28Å. This significant increase in spectral resolution dramatically boosts contrast on the solar disk, making surface details like granulation, plages, and the intricate structure of filaments appear much more defined.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt 50mm Ha Etalon Filter on a telescope other than the LS60MT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The LS50FHa can function as a primary, front-mounted H-alpha filter on a compatible refractor with up to 50mm of aperture. However, to create a safe and functional solar telescope, you \u003cstrong\u003emust\u003c\/strong\u003e pair it with a correctly sized Lunt blocking filter installed at the eyepiece end of your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the LS50FHa's tilt-tuning work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eLunt 50mm Ha Etalon Filter\u003c\/strong\u003e uses a mechanical tilt mechanism to slightly angle the etalon relative to the incoming light. This angle shifts the filter's central wavelength, allowing you to fine-tune the view for the best contrast or to study features that are Doppler-shifted, such as fast-moving ejecta in a solar flare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to send my LS60MT to the factory to install the LS50FHa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The LS50FHa is designed for easy, at-home installation. It threads directly onto the front of the Lunt LS60MT telescope, requiring no special tools or factory service. This allows you to easily switch between single-stacked, double-stacked, and nighttime configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the LS50FHa help me see solar prominences versus surface granulation on the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile a single-stack system shows prominences well, the high-contrast view from double-stacking with the LS50FHa excels at revealing faint, low-contrast surface details. The intricate \"salt and pepper\" texture of solar granulation and the bright, web-like patterns of plages around sunspots become significantly more visible with the \u0026lt;0.28Å bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a 60mm f\/6 refractor. Can I use the LS50FHa on it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the LS50FHa filter itself has a 50mm aperture, you could use it on your 60mm refractor by stopping the telescope's aperture down to 50mm. To complete the system for your f\/6 (360mm focal length) telescope, you would need to add a Lunt B600 blocking filter for visual use. Using an undersized etalon is a common practice for creating a portable solar scope.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eLS50FHaP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eFront-Mount Hydrogen-Alpha Etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (Single)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.4Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eTilt-Tuned\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Compatibility\u003c\/td\u003e\n\u003ctd\u003eLunt LS60MT (as double-stack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (Double-Stacked on LS60MT)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.28Å\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\"\u003eLunt 50mm Ha Etalon 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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt_Solar_Systems_LS50FHa_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\"\u003eDownload 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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967533543709,"sku":"LSS-LS50FHaP","price":1603.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-50mm-Etalon-LS50FHa-1__41937.1598241417.1280.1280.jpg?v=1684343584"},{"product_id":"lunt-60mm-ha-etalon-filter","title":"Lunt 60mm Ha Etalon Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e60mm Aperture\u003c\/li\u003e\n\u003cli\u003e0.4Å Bandpass H-Alpha Filter\u003c\/li\u003e\n\u003cli\u003eTilt-Tuned Etalon\u003c\/li\u003e\n\u003cli\u003eDouble-Stacks Lunt 60mm Scopes to \u0026lt;0.28Å\u003c\/li\u003e\n\u003cli\u003eFront-Mount Filter Design\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\u003eLunt 60mm Ha Etalon Filter\u003c\/h2\u003e\n      \u003cp\u003eThe Lunt 60mm Ha Etalon Filter delivers the high-contrast views of a verified 0.4Å bandpass through its 60mm front-mounted etalon. This filter serves a dual role, capable of either converting a standard refractor into a dedicated solar telescope or double-stacking a compatible Lunt 60mm system to achieve a bandpass of less than 0.28Å for maximum surface detail.\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\u003eA Verified 0.4Å Bandpass in a 60mm Aperture\u003c\/h3\u003e\n      \u003cp\u003eThis filter's core is a 60mm unobstructed etalon, precision-tuned to a 0.4Å bandpass at the hydrogen-alpha wavelength. Unlike filters with estimated specifications, every Lunt LS60FHa is individually tested using precision metrology equipment to guarantee its performance. The tilt-tuning mechanism allows you to shift the bandpass slightly, providing the ability to dial in the highest contrast on solar features experiencing Doppler shift, such as filaments and active regions.\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\u003eAchieve \u0026lt;0.28Å Contrast on Your Lunt 60mm Telescope\u003c\/h3\u003e\n      \u003cp\u003eFor owners of a Lunt LS60MT or LS60THa telescope, the LS60FHa acts as a powerful double-stacking upgrade. By mounting this second etalon to the front of your existing telescope, you narrow the system's final bandpass to under 0.28Å. This dramatic reduction in bandwidth significantly increases contrast across the solar disk, revealing finer texture in the chromosphere and rendering filaments with a striking, three-dimensional appearance against a darker sky background.\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\u003eConvert Any Refractor into a 60mm H-Alpha Solar Scope\u003c\/h3\u003e\n      \u003cp\u003eThe LS60FHa can also serve as the primary objective filter for a custom solar telescope built around your own nighttime refractor. When paired with a compatible Lunt blocking filter, this front-mounted 60mm etalon transforms your refractor into a high-resolution H-alpha instrument. Because it mounts on the front, it is easily removable, allowing you to quickly return your telescope to its original configuration for night sky observing.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eTo use the Lunt LS60FHa on my own refractor, what else do I need?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eUsing the LS60FHa as a standalone filter requires a \u003cstrong\u003eLunt Blocking Filter\u003c\/strong\u003e, which must be purchased separately. The blocking filter is a critical safety component that removes harmful UV and IR radiation and is essential for the etalon to function correctly. You must select a blocking filter appropriately sized for your telescope's focal length.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the visual difference when I double-stack my LS60THa with the LS60FHa to view a solar flare?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA single-stacked LS60THa provides excellent views, but double-stacking to achieve a \u003cstrong\u003e\u0026lt;0.28Å bandpass\u003c\/strong\u003e dramatically increases contrast. When viewing a flare or filament, the feature will appear darker and more defined against a more uniform, darker solar disk. This enhanced contrast often reveals subtle structural details that are washed out at a wider bandpass.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the tilt-tuning on the LS60FHa work?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe tilt-tuning mechanism physically angles the etalon relative to the incoming light. This slight tilt shifts the filter's central wavelength, allowing you to \"tune\" into the precise wavelength of solar features that may be slightly blue- or red-shifted due to their velocity relative to us (Doppler effect). This allows you to maximize contrast on specific active regions or filaments.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI have a 100mm refractor. Will the LS60FHa give me a 100mm H-alpha view?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The LS60FHa has a clear aperture of \u003cstrong\u003e60mm\u003c\/strong\u003e. When placed on the front of any telescope, it acts as a 60mm aperture stop. Your 100mm refractor will perform as a 60mm H-alpha solar telescope, with its resolution and light-gathering ability limited to that of a 60mm instrument.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt LS60FHa difficult to install for double-stacking?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eInstallation is straightforward. The LS60FHa is designed to thread directly onto the front of compatible Lunt 60mm telescopes, such as the LS60MT and LS60THa. No tools are required, and the process typically takes less than a minute, making it easy to add or remove based on your observing goals for the day.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does a \"verified\" 0.4Å bandpass on the LS60FHa mean?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt means that Lunt Solar Systems individually tests each LS60FHa etalon with precision metrology instruments to confirm it meets the \u003cstrong\u003e0.4Å\u003c\/strong\u003e specification. This provides assurance that you are receiving a filter that performs to the stated level of contrast, rather than one based on a design estimate or batch testing.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eLS60FHaP\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eFront-Mount H-Alpha Solar Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e0.4Å\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eTilt-Tuned Etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDouble-Stack Bandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.28Å (with compatible Lunt scope)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eLunt LS60MT, Lunt LS60THa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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\/Lunt_Solar_Systems_LS60THaPT_Solar_Telescope_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967533609245,"sku":"LSS-LS60FHa","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-60mm-Etalon-LS60FHa-1__05476.1645560455.1280.1280.jpg?v=1684343588"},{"product_id":"lunt-b600-blocking-filter","title":"Lunt B600 Blocking Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e6mm Blocking Filter Aperture\u003c\/li\u003e\n\u003cli\u003eRequired safety component for all Lunt H-alpha etalon systems\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" star diagonal housings\u003c\/li\u003e\n\u003cli\u003eAvailable in a 2\" straight-through housing for imaging\u003c\/li\u003e\n\u003cli\u003eAll housings include a T2 thread for secure camera connection\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eLunt B600 Blocking Filter\u003c\/h2\u003e\n      \u003cp\u003eThe Lunt B600 Blocking Filter is the essential safety and performance component for any Lunt H-alpha solar viewing system, featuring a 6mm aperture designed for visual work with shorter focal length telescopes. Available in multiple housings including 1.25\" and 2\" star diagonals or a 2\" straight-through tube, each configuration provides a standard T2 thread for direct camera attachment. This filter is not optional; it contains a unique, multi-filter system that is critical for safe solar observation in the hydrogen-alpha wavelength.\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\u003eThe Essential 6mm Safety Component for Lunt H-alpha Systems\u003c\/h3\u003e\n      \u003cp\u003eA Lunt blocking filter is a mandatory part of your complete H-alpha solar telescope. It houses the additional filters required for safe, high-contrast views of solar prominences and surface detail. Lunt can only warranty the safety and optical performance of their systems when a Lunt etalon is paired with a matching Lunt blocking filter like this 6mm B600 model.\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\u003eChoosing the B600 for Visual vs. Imaging Use\u003c\/h3\u003e\n      \u003cp\u003eSelecting the correct blocking filter depends entirely on your telescope's focal length and your intended application. The 6mm B600 is the ideal starting point for visual observation with short focal length refractors. However, solar imaging requires more back focus than an eyepiece, moving the camera sensor further up the light cone. To avoid vignetting your image, Lunt recommends choosing the next larger blocking filter (like the B1200) for imaging applications to ensure the sensor is fully illuminated.\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\u003eB600 Housing Formats: 1.25\" and 2\" Diagonal or Straight-Through Configurations\u003c\/h3\u003e\n      \u003cp\u003eTo integrate with any equipment setup, the B600 is offered in several housings. The 1.25\" and 2\" star diagonal versions provide a comfortable 90-degree viewing angle for visual use. For dedicated imaging trains where minimizing components is key, the 2\" straight-through tube offers a direct, secure light path. All options include a T2 male thread for a rigid connection to most astronomy cameras.\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\u003eLunt B600 (6mm) vs. B1200 (12mm): When to Step Up in Aperture\u003c\/h3\u003e\n      \u003cp\u003eThe primary difference between Lunt blocking filters is their clear aperture, which determines the size of the solar image they can pass without vignetting.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLunt B600 (6mm):\u003c\/strong\u003e Best suited for visual observation with telescopes of shorter focal length. It provides a generous field for viewing the full solar disk in these instruments.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLunt B1200 (12mm):\u003c\/strong\u003e Becomes necessary for telescopes with longer focal lengths or for any imaging application. Its larger aperture accommodates the wider light cone created by increased back focus, preventing the edges of the solar disk from being clipped on a camera sensor.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Lunt B600 Blocking Filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Lunt B600 is a required safety component for any Lunt Solar Systems H-alpha etalon. It contains a series of secondary filters that block harmful radiation and heat, while also enhancing the contrast of solar features. It is not an optional accessory; your Lunt etalon will not perform correctly or safely without it.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B600 Blocking Filter with a non-Lunt etalon?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. Lunt blocking filters are designed as part of an integrated system. Lunt only warranties the safety and performance of their products when their etalons are paired with a corresponding Lunt blocking filter. Using it with other systems is not recommended and can be unsafe.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eShould I get the B600 or B1200 for my Lunt LS50THa telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor purely \u003cstrong\u003evisual use\u003c\/strong\u003e with the Lunt LS50THa, the B600 is perfectly adequate and will show the full solar disk. However, if you plan to do any \u003cstrong\u003eimaging\u003c\/strong\u003e, it is strongly recommended to choose the larger B1200 to prevent vignetting (darkening at the corners of your image) due to the extra back focus required by a camera.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a larger blocking filter like the B1200 recommended for imaging with my 80mm f\/7 refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAn 80mm f\/7 refractor has a 560mm focal length. While the B600 is suitable for visual use at this focal length, imaging setups require more back focus. This means your camera sensor sits farther back from the telescope than an eyepiece, intersecting a wider part of the light cone. The larger aperture of a B1200 ensures this wider cone passes through to the sensor without being clipped, preserving brightness across the entire field.\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 diagonal and straight-through versions of the Lunt B600?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe choice depends on your application:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eStar Diagonal (1.25\" or 2\"):\u003c\/strong\u003e This is the standard choice for visual observing, as it places the eyepiece at a comfortable 90-degree angle.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eStraight-Through (2\"):\u003c\/strong\u003e This version is preferred for imaging, as it provides a direct light path to the camera sensor with fewer optical surfaces and potential for flexure.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Lunt B600 come with T2 threads?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, all available housing options for the Lunt B600 blocking filter—the 1.25\" diagonal, 2\" diagonal, and 2\" straight-through tube—come equipped with a male T2 thread connection. This allows for a secure, threaded attachment to most standard astronomy cameras and T-rings.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eB400\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBlocking Filter Aperture\u003c\/td\u003e\n\u003ctd\u003e6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAvailable Housings\u003c\/td\u003e\n\u003ctd\u003e1.25\" Star Diagonal, 2\" Star Diagonal, 2\" Straight-Through Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eT2 Thread (on all housing options)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eLunt B600 Blocking Filter\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e(Housing as selected)\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"2\" in Straight Thru 2\" tube with T2 \u0026 2\" connection","offer_id":44967533740317,"sku":"LSS-B600s","price":553.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" in Star diagonal with T2 connection","offer_id":44967533773085,"sku":"LSS-B600d1","price":553.0,"currency_code":"CAD","in_stock":true},{"title":"2\" in Star diagonal with T2 connection","offer_id":44967533805853,"sku":"LSS-B600d2","price":553.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Blocking-Filter-Diagonal-Straight-Through__18551.1598239592.1280.1280.jpg?v=1684343598"},{"product_id":"lunt-b1200-blocking-filter","title":"Lunt B1200 Blocking Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e12mm Blocking Filter Aperture\u003c\/li\u003e\n\u003cli\u003eRequired safety component for all Lunt H-alpha Etalon systems\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" or 2\" diagonal housings\u003c\/li\u003e\n\u003cli\u003eAvailable in a 2\" straight-through housing for imaging\u003c\/li\u003e\n\u003cli\u003eIncludes T2 threads for secure camera connection\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\u003eLunt B1200 Blocking Filter\u003c\/h2\u003e\n\u003cp\u003eThe Lunt B1200 Blocking Filter integrates a 12mm aperture with essential, non-removable safety filters, making it a mandatory component for any Lunt H-alpha solar telescope or Etalon filter system. Available in 1.25\" or 2\" diagonal housings for visual comfort, as well as a 2\" straight-through option for imaging, the B1200 is designed to prevent vignetting in telescopes with moderate to long focal lengths. This 12mm filter size ensures the entire solar disc is illuminated at the focal plane and is the recommended minimum for most imaging applications.\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 12mm Blocking Filter's Role in a Lunt H-alpha System\u003c\/h3\u003e\n\u003cp\u003eA Lunt blocking filter is not an optional accessory; it is an integral part of the solar filtering system that is absolutely required for safe observation. The B1200's housing contains a unique, multi-filter stack that works in conjunction with the front-mounted Etalon to reject harmful radiation and isolate the H-alpha wavelength. Lunt Solar Systems can only warranty the safety and optical performance of their systems when a Lunt Etalon is paired with a matching Lunt blocking filter.\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\u003eSizing and Application: Why a 12mm Aperture is Critical for Imaging\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct blocking filter is determined by your telescope's focal length and your intended application. The 12mm aperture of the B1200 is sized to fully illuminate the field in telescopes with longer focal lengths, preventing the edge of the solar disk from being cut off. For imagers, the B1200 is often the necessary choice even on shorter scopes, as imaging trains require additional back focus. This moves the filter further from the focal plane, where the light cone is wider, demanding the larger 12mm aperture to avoid vignetting your camera 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\u003eChoosing Between 1.25\" Diagonal, 2\" Diagonal, or 2\" Straight-Through Housings\u003c\/h3\u003e\n\u003cp\u003eThe Lunt B1200 is available in three distinct housings to match your equipment and observing style, with all versions including an integrated T2 thread for direct camera attachment.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagonal Housings (1.25\" or 2\"):\u003c\/strong\u003e These are the standard choice for visual observing, placing the eyepiece at a comfortable 90-degree angle. Choose the barrel size that matches your eyepieces and focuser.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStraight-Through Housing (2\"):\u003c\/strong\u003e This configuration is purpose-built for astro-imaging. It provides a direct, non-deflected light path to the camera sensor, which is critical for minimizing tilt and ensuring the sharpest possible image across the entire field.\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\"\u003eWhy is the Lunt B1200 Blocking Filter required for my Lunt Etalon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt B1200 is a critical safety component. It contains secondary filters that work with the main Etalon to block harmful UV and IR radiation, making solar observation safe. Its use is mandatory for the proper and safe functioning of any Lunt H-alpha system, and is required for warranty coverage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eShould I choose the Lunt B1200 or a smaller blocking filter like the B600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice depends on your telescope's focal length and whether you plan to do visual observing or imaging. The \u003cstrong\u003eLunt B1200\u003c\/strong\u003e is designed for telescopes with longer focal lengths to prevent the edges of the Sun's disc from being cut off. It is also the recommended starting point for imaging, as camera sensors require more back focus, which in turn requires a larger blocking filter aperture to avoid vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI want to image the Sun with my 1200mm focal length refractor. Is the Lunt B1200 correct?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Lunt B1200 is an excellent choice for a telescope with a 1200mm focal length, especially for imaging. The 12mm aperture is large enough to accommodate the wider light cone associated with both the long focal length and the increased back focus needed for a camera, ensuring your sensor is fully illuminated.\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 diagonal and straight-through versions of the Lunt B1200?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003ediagonal housings (1.25\" and 2\")\u003c\/strong\u003e are primarily for visual use, providing a comfortable 90-degree viewing angle. The \u003cstrong\u003e2\" straight-through housing\u003c\/strong\u003e is designed for imaging, as it provides a direct light path to the camera sensor, which helps to eliminate potential optical tilt and ensures the highest image fidelity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B1200 to see a full-disc view of the Sun in my Lunt LS80THa telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Lunt B1200's 12mm aperture is more than sufficient to provide a complete, unvignetted view of the entire solar disc when used visually with a Lunt LS80THa or other telescopes with similar focal lengths. It provides a generous field of view for framing the Sun and surrounding prominences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo all versions of the Lunt B1200 Blocking Filter have a T2 thread for my astronomy camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, all available housing options for the Lunt B1200—the 1.25\" diagonal, 2\" diagonal, and 2\" straight-through tube—come standard with a T2 connection. This allows you to securely thread your camera directly to the blocking filter for imaging.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eB400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Housings\u003c\/td\u003e\n\u003ctd\u003e2\" Straight-Through Tube, 1.25\" Star Diagonal, 2\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eT2 Thread (on all housing options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece\/Focuser Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" or 2\" (depending on housing option)\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\"\u003eLunt B1200 Blocking Filter Assembly\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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"2\" in Straight Thru 2\" tube with T2 \u0026 2\" connection","offer_id":44967533904157,"sku":"LSS-B1200s","price":693.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" in star diagonal with T2 connection","offer_id":44967533936925,"sku":"LSS-B1200d1","price":693.0,"currency_code":"CAD","in_stock":true},{"title":"2\" in star diagonal with T2 connection","offer_id":44967533969693,"sku":"LSS-B1200d2","price":693.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Blocking-Filter-Diagonal-Straight-Through__52595.1598239665.1280.1280.jpg?v=1684343605"},{"product_id":"lunt-b1800-blocking-filter","title":"Lunt B1800 Blocking Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eRequired safety component for all Lunt Solar Systems H-alpha etalons\u003c\/li\u003e\n\u003cli\u003eSized for longer focal length telescopes to prevent vignetting\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" star diagonal housings for visual comfort\u003c\/li\u003e\n\u003cli\u003eAvailable in a 2\" straight-through housing for imaging applications\u003c\/li\u003e\n\u003cli\u003eFeatures integrated T2 threads for secure camera attachment on all models\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\u003eLunt B1800 Blocking Filter\u003c\/h2\u003e\n\u003cp\u003eAvailable in 1.25\" and 2\" formats, the Lunt B1800 Blocking Filter is a critical safety component for all Lunt H-alpha etalon systems and is specifically sized to prevent vignetting in telescopes with longer focal lengths. The B1800 is offered in multiple housings, including a 2\" straight-through tube and both 1.25\" and 2\" star diagonals, all of which incorporate a T2 thread for secure camera connections.\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 Lunt B1800: A Critical Safety Component in 1.25\" and 2\" Formats\u003c\/h3\u003e\n\u003cp\u003eA Lunt blocking filter is not an optional accessory; it is an essential part of the complete solar telescope system. The housing contains additional, specialized filters that work in conjunction with the main etalon to reject harmful radiation and provide a safe, high-contrast view of the Sun's chromosphere. Lunt Solar Systems can only warranty the safety and optical performance of their H-alpha systems when used with a matching Lunt blocking filter.\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\u003eSizing the B1800: Matching Filter Aperture to Telescope Focal Length\u003c\/h3\u003e\n\u003cp\u003eThe \"B1800\" designation indicates this blocking filter is designed for telescopes with longer focal lengths. As a telescope's focal length increases, the light cone it produces becomes longer and narrower, requiring a larger blocking filter aperture at the focal plane to intercept the entire field of view without vignetting. The B1800 ensures that the full solar disk remains illuminated, which is crucial for both visual observation and imaging.\u003c\/p\u003e\n\u003cp\u003eFor imaging, it is recommended to choose a larger blocking filter than required for visual use with the same telescope. The added back focus of a camera setup moves the sensor further down the optical path, where the light cone is wider. The B1800 provides the necessary aperture to accommodate this wider cone, preventing the edges of your images from being clipped or darkened.\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\u003eHousing \u0026amp; Connectivity: T2 Threads on All 3 B1800 Configurations\u003c\/h3\u003e\n\u003cp\u003eThe Lunt B1800 is available in three distinct configurations to match your equipment and observing style. Your choice of housing does not affect the filter's performance but determines its physical connection to your telescope and eyepieces.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagonal Housings (1.25\" or 2\"):\u003c\/strong\u003e These are the standard choice for visual observing, providing a comfortable 90-degree viewing angle. The choice between a 1.25\" and 2\" model depends on your focuser and eyepiece collection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStraight-Through Housing (2\"):\u003c\/strong\u003e This version is optimized for astrophotography. It provides a direct, rigid optical path to the camera sensor, minimizing potential flexure and making it easier to achieve perfect focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT2 Threads:\u003c\/strong\u003e All three versions come standard with male T2 (M42x0.75) threads, allowing you to connect most dedicated astronomy cameras directly and securely to the blocking filter.\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\"\u003eWhy is the Lunt B1800 Blocking Filter required for my Lunt solar telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt B1800 is a mandatory safety component. It contains a set of secondary filters that work with your main etalon to remove harmful out-of-band radiation, making it safe to view the Sun. It is not just a simple diagonal or adapter; it is an integral part of the telescope's filtering system, and Lunt only warranties safety and performance when their etalons and blocking filters are used together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if the Lunt B1800 is the right size for my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe correct blocking filter size is determined by your telescope's focal length. The \u003cstrong\u003eLunt B1800\u003c\/strong\u003e is designed for telescopes with longer focal lengths. Using a filter that is too small for your telescope's focal length will result in vignetting, where the edges of the Sun's disk are cut off. If you plan to image, it's always recommended to select the next larger blocking filter than what is suggested for visual use alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eShould I get the diagonal or straight-through version of the Lunt B1800 Blocking Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose the housing based on your primary use. For \u003cstrong\u003evisual observing\u003c\/strong\u003e, a diagonal housing (either 1.25\" or 2\") provides a much more comfortable viewing angle. For \u003cstrong\u003eastrophotography\u003c\/strong\u003e, the 2\" straight-through housing provides the most rigid and direct connection for your camera, which helps prevent flexure and maintain focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI want to image the Sun with my 1200mm refractor. Is the Lunt B1800 a better choice than the B1200?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for imaging, the Lunt B1800 is the superior choice for a 1200mm focal length telescope. While a B1200 would work for visual use, imaging systems require more back focus. This moves the camera sensor further from the focal plane, intersecting a wider part of the light cone. The larger aperture of the B1800 is necessary to illuminate the entire camera sensor without vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B1800 Blocking Filter for visual observing in my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Lunt B1800 is an excellent match for a typical 8\" Schmidt-Cassegrain Telescope (SCT). These telescopes usually have a focal length around 2000mm, which requires a larger blocking filter like the B1800 to fully illuminate the field of view for visual observation of solar prominences and surface detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the T2 thread on the Lunt B1800 Blocking Filter for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe T2 (M42x0.75) thread is an industry standard for astrophotography. It allows you to attach a dedicated astronomy camera, DSLR with a T-ring, or other imaging accessories directly to the Lunt B1800 Blocking Filter. This creates a secure, threaded connection that is far more stable than using a simple set screw in an eyepiece holder.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eB400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003e2\" in Straight Thru 2\" tube with T2 \u0026amp; 2\" connection, 1.25\" in star diagonal with T2 connection, 2\" in star diagonal with T2 connection\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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"2\" in Straight Thru 2\" tube with T2 \u0026 2\" connection","offer_id":44967534002461,"sku":"LSS-B1800s","price":1113.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" in star diagonal with T2 connection","offer_id":44967534035229,"sku":"LSS-B1800d1","price":1113.0,"currency_code":"CAD","in_stock":true},{"title":"2\" in star diagonal with T2 connection","offer_id":44967534067997,"sku":"LSS-B1800d2","price":1113.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Blocking-Filter-Diagonal-Straight-Through__59879.1598239736.1280.1280.jpg?v=1684343569"},{"product_id":"lunt-b3400-blocking-filter","title":"Lunt B3400 Blocking filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e34mm Blocking Filter Aperture\u003c\/li\u003e\n\u003cli\u003eRequired safety component for all Lunt Solar Telescopes\u003c\/li\u003e\n\u003cli\u003eOptimized for visual use up to 3400mm focal length\u003c\/li\u003e\n\u003cli\u003eRecommended for imaging use up to 1800mm focal length\u003c\/li\u003e\n\u003cli\u003e2-inch straight-through housing with T2 and 2-inch connections\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\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\u003eLunt B3400 Blocking Filter\u003c\/h2\u003e\n\u003cp\u003eThe Lunt B3400 Blocking Filter is a non-negotiable safety and component for long focal length solar observation, providing a clear 34mm aperture housed in a 2-inch straight-through body. This filter is specifically engineered to prevent vignetting in telescopes with focal lengths up to 3400mm for visual use and 1800mm for imaging. Its integrated 2-inch and T2 connections ensure direct compatibility with a wide range of eyepieces and cameras, making it the correct choice for large refractors and Schmidt-Cassegrains dedicated to H-alpha solar work.\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 34mm Blocking Filter: A Mandatory Safety System\u003c\/h3\u003e\n\u003cp\u003eA Lunt blocking filter is not an optional accessory; it is a required component for the safe operation of any Lunt H-alpha solar telescope or filter. The B3400 contains a multi-layer filter system that rejects harmful out-of-band radiation, working in tandem with the primary etalon to isolate the 656nm H-alpha line. Lunt's safety and warranty are contingent on using their integrated system, as the blocking filter is the final, critical stage in delivering a safe and high-contrast view of the Sun's chromosphere.\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\u003e3400mm for Visual, 1800mm for Imaging: Preventing Vignetting\u003c\/h3\u003e\n\u003cp\u003eThe primary function of the large 34mm aperture in the B3400 is to fully illuminate the field of view in long focal length instruments. For visual observation with wide-field, low-power eyepieces, it supports telescopes up to 3400mm, ensuring the edges of the view remain bright. For imaging, where camera sensors are typically smaller than an eyepiece's field stop, the recommended maximum focal length is 1800mm to guarantee an unvignetted, evenly illuminated 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\u003e2-inch Straight-Through Housing with T2 Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe B3400 is built into a robust 2-inch straight-through extension tube, designed for straightforward integration into your optical train. This housing provides two standard connection points for maximum flexibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-inch Barrel:\u003c\/strong\u003e Allows you to directly insert 2-inch eyepieces or other 2-inch accessories for visual observation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT2 Male Threads:\u003c\/strong\u003e Provides a rigid, threaded connection (M42x0.75) for attaching DSLR T-rings or dedicated astronomy cameras, minimizing tilt and ensuring a secure imaging setup.\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\u003eLunt B3400 vs. B1800: Matching the Filter to Your Telescope\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct blocking filter is critical for field illumination. The decision between the B3400 and smaller models like the B1800 depends entirely on your telescope's focal length.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLunt B1800 Advantage:\u003c\/strong\u003e The B1800 is the correct choice for telescopes with focal lengths up to 1800mm for visual use. It is more affordable and perfectly suited for a wide range of mid-sized refractors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLunt B3400 Advantage:\u003c\/strong\u003e The B3400 is purpose-built for longer instruments. If you use a telescope with a focal length between 1800mm and 3400mm, the B3400 is required to avoid significant vignetting (dimming at the edge of the field) that the B1800 would cause.\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\"\u003eWhy is the Lunt B3400 blocking filter a required component?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt B3400 is an essential safety device. While the main H-alpha etalon filters the light, the blocking filter contains additional filtering to reject all other harmful wavelengths of light from reaching your eye or camera. It is a mandatory part of the Lunt solar filter system, and performance and safety are only warrantied when a Lunt blocking filter is used with a Lunt H-alpha filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat happens if I use the Lunt B3400 on a telescope with a 4000mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEven though the B3400 is Lunt's largest blocking filter, using it on a telescope with a focal length significantly beyond its 3400mm visual rating will result in \u003cstrong\u003evignetting\u003c\/strong\u003e. The light cone from the primary mirror will be too large for the filter's 34mm aperture to pass entirely, causing the edges of your field of view to appear dim or completely dark.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B3400 to image the Sun with my 10\" f\/10 SCT (2500mm focal length)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is not recommended. The Lunt B3400 is rated for imaging on telescopes with focal lengths up to 1800mm. On a 2500mm system, you would experience significant vignetting on all but the very smallest imaging sensors. To use your SCT for H-alpha imaging, you would need to use a focal reducer to bring the effective focal length down to 1800mm or less.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main difference between the Lunt B3400 and the B1800 blocking filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe only functional difference is the focal length they support. The \u003cstrong\u003eB1800\u003c\/strong\u003e is for telescopes up to 1800mm (visual), while the \u003cstrong\u003eB3400\u003c\/strong\u003e is required for telescopes with focal lengths between 1800mm and 3400mm. Using a filter that is too small for your telescope's focal length will cause the view to be cut off at the edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the T2 threads on the Lunt B3400 blocking filter used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe male T2 (M42x0.75) threads provide a secure, direct attachment point for imaging equipment. You can connect a DSLR camera using a brand-specific T-ring or attach a dedicated astronomy camera that has female T2 threads, creating a rigid connection that prevents camera sag or tilt.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B3400 with a solar etalon from another brand?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Lunt Solar Systems explicitly states that their blocking filters are part of an integrated system. Safety and performance can only be warrantied when a Lunt blocking filter is paired with a Lunt H-alpha filter or telescope. Mixing and matching components from different manufacturers is unsafe and not supported.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eB3400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Diameter\u003c\/td\u003e\n\u003ctd\u003e2 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Connection\u003c\/td\u003e\n\u003ctd\u003e2-inch Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Connections\u003c\/td\u003e\n\u003ctd\u003e2-inch Eyepiece Holder, T2 (M42x0.75) Male Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Visual Focal Length\u003c\/td\u003e\n\u003ctd\u003e3400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Imaging Focal Length\u003c\/td\u003e\n\u003ctd\u003e1800mm\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\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967534166301,"sku":"LSS-B3400s2","price":3493.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-B3400-Blocking-Filter-1__43395.1598240039.1280.1280.jpg?v=1684343575"},{"product_id":"lunt-b600-calcium-k-blocking-filter","title":"Lunt B600 Calcium K Blocking Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIsolates the 393.4 nm Calcium-K (Ca-K) emission line\u003c\/li\u003e\n\u003cli\u003e6mm internal blocking filter aperture\u003c\/li\u003e\n\u003cli\u003eNarrow \u0026lt;2.4 Angstrom bandpass for high-contrast views\u003c\/li\u003e\n\u003cli\u003eAvailable in 2-inch diagonal or straight-through housings\u003c\/li\u003e\n\u003cli\u003eOptimized primarily for solar imaging\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eLunt B600 Calcium K Blocking Filter\u003c\/h2\u003e\n      \u003cp\u003eThe Lunt B600 Calcium K Blocking Filter is an imaging module designed to isolate the 393.4 nm emission line with a 6mm internal blocking filter. With a narrow \u0026lt;2.4 Angstrom bandpass, this 2-inch module reveals the intricate, high-contrast details of the Sun's lower chromosphere—a layer of solar activity just below what is visible in Hydrogen-alpha.\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\u003eThe 393.4 nm Calcium-K Line: A Deeper Look at Solar Activity\u003c\/h3\u003e\n      \u003cp\u003eThis filter targets the Calcium-K (Ca-K) line at 393.4 nm, an emission from ionized calcium at the edge of the visible spectrum. This reveals a cooler, lower layer of the chromosphere than H-alpha, showing areas of super-granulation cells that are brightest in regions of intense magnetic fields. By studying the sun in both Ca-K and H-alpha, you gain crucial insights into the structure, strength, and depth of active regions and sunspots.\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\u003eA \u0026lt;2.4 Angstrom Bandpass Optimized for Cameras\u003c\/h3\u003e\n      \u003cp\u003eWith a bandpass of less than 2.4 Angstroms, the Lunt B600 delivers the high contrast needed to resolve fine chromospheric details. Because the 393.4 nm wavelength sits in the deep violet\/UV part of the spectrum, it can be difficult for the human eye to perceive fully, as the cornea naturally yellows with age. For this reason, the Ca-K line is best studied with monochrome cameras, which are highly sensitive at this wavelength and can capture stunningly detailed images of the solar surface.\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\u003e2-inch Diagonal or Straight-Through Housings for Refractors\u003c\/h3\u003e\n      \u003cp\u003eThe Lunt B600 Ca-K module is designed for versatility and can be integrated with most standard nighttime refractors or Lunt's Modular Telescopes. It is available in two 2-inch housings to suit your imaging train: a 2-inch star diagonal for a comfortable equipment angle, or a 2-inch straight-through tube for direct optical paths. Both versions include a T2 thread for secure camera attachment, with the straight-through model also offering a standard 2-inch eyepiece\/accessory holder.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Lunt B600 Ca-K filter primarily for imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe filter isolates light at \u003cstrong\u003e393.4 nm\u003c\/strong\u003e, which is a deep violet color at the edge of the human visible spectrum. Many people, especially as they get older, have difficulty perceiving contrast at this wavelength due to natural yellowing of the eye's cornea. Cameras, particularly monochrome CMOS\/CCD sensors, are very sensitive to this wavelength and can record far more detail than is typically visible by eye.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat will I see with the Lunt B600 Ca-K filter that I can't see in H-alpha?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Lunt B600 Ca-K filter shows a different, slightly lower and cooler layer of the Sun's chromosphere. Key features visible in Ca-K include:\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSupergranulation:\u003c\/strong\u003e A network of large-scale convection cells across the solar surface.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePlage:\u003c\/strong\u003e Bright regions around sunspots that indicate high magnetic activity, which appear with higher contrast in Ca-K.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSunspot Structure:\u003c\/strong\u003e Details in the magnetic regions preceding and surrounding sunspots.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B600 Ca-K module with my existing non-Lunt refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, the Lunt B600 Ca-K module is designed to work with most standard nighttime refractors. You simply insert the 2-inch blocking filter diagonal or straight-through tube into your focuser. No other filters are required on the front of the telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Lunt B600 Ca-K filter reveal details in a complex sunspot group like AR3664?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor a large active region like AR3664, the Lunt B600 Ca-K filter would excel at highlighting the bright, magnetically active plage surrounding the dark sunspot umbrae. It would clearly define the boundaries of the magnetic activity and show the underlying supergranulation network, providing a more complete picture of the region's structure than a white-light or H-alpha view alone.\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 diagonal and straight-through versions of the Lunt B600 Ca-K filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eBoth versions contain the same 6mm Ca-K blocking filter. The choice depends on your setup preference:\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eThe \u003cstrong\u003e2\" Star Diagonal\u003c\/strong\u003e version provides a 90-degree angle, which can be more convenient for positioning equipment and avoiding clearance issues on some mounts.\u003c\/li\u003e\n        \u003cli\u003eThe \u003cstrong\u003e2\" Straight-Through\u003c\/strong\u003e version keeps your camera and accessories directly in the optical path, which some imagers prefer for simplicity. It also includes both T2 threads and a 2\" eyepiece holder.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI have an 80mm f\/7 refractor; which camera type works best with the Lunt B600 Ca-K filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor an 80mm refractor, a \u003cstrong\u003emonochrome CMOS planetary camera\u003c\/strong\u003e with small pixels (around 2.9 to 3.75 microns) would be an excellent match for the Lunt B600 Ca-K filter. The monochrome sensor provides the necessary sensitivity at the 393.4 nm wavelength, and the small pixels will provide high-resolution sampling of the solar details delivered by your telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e393.4 nm (Calcium-K)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.4 Angstroms\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBlocking Filter Aperture\u003c\/td\u003e\n\u003ctd\u003e6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHousing Format\u003c\/td\u003e\n\u003ctd\u003e2-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAvailable Housings\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal or 2\" Straight-Through Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd\u003eT2 and\/or 2\" depending on housing choice\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003eLS6CaKMD\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eLS12CaKMD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eLunt B600 Calcium K Blocking Filter Module (in selected housing)\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\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"2\" in Star diagonal with T2 connection","offer_id":44967534199069,"sku":"LSS-LS6CaKMDd","price":1253.0,"currency_code":"CAD","in_stock":true},{"title":"2\" in Straight Thru 2\" tube with T2 \u0026 2\" connection","offer_id":44967534231837,"sku":"LSS-LS6CaKMDs","price":1253.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Calcium-K-B1800-Diagonal-Straight-Through__72906.1598206201.1280.1280.jpg?v=1684343582"},{"product_id":"lunt-b1200-cak-blocking-filter","title":"Lunt B1200 CaK Blocking Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReveals solar details in the 393.4 nm Calcium-K line\u003c\/li\u003e\n\u003cli\u003eInternal narrowband filter with a \u0026lt;2.4 Angstrom bandpass\u003c\/li\u003e\n\u003cli\u003eFeatures a 12mm blocking filter\u003c\/li\u003e\n\u003cli\u003eDesigned primarily for solar imaging\u003c\/li\u003e\n\u003cli\u003eAvailable in a 2\" diagonal or 2\" straight-thru housing\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\u003eLunt B1200 CaK Blocking Filter\u003c\/h2\u003e\n\u003cp\u003eThe Lunt B1200 CaK Blocking Filter module isolates the 393.4 nm Calcium K emission line, revealing a cooler, lower layer of the Sun's chromosphere than H-alpha viewing. With a narrow \u0026lt;2.4 Angstrom bandpass, this 12mm blocking filter is engineered to transform a standard nighttime refractor into a dedicated solar instrument for high-contrast imaging of supergranulation cells and active regions.\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 Solar Structure at 393.4 nm\u003c\/h3\u003e\n\u003cp\u003eThe Calcium K wavelength at 393.4 nm provides a unique view of solar magnetic activity. This emission line highlights areas of supergranulation, which appear brightest and most defined in regions of high magnetic flux, such as those surrounding sunspots. By studying the Sun in both Ca-K and H-alpha, you gain crucial insights into the structure, strength, and depth of these active regions, creating a more complete picture of solar dynamics.\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\u003e\u0026lt;2.4 Angstrom Bandpass for High-Contrast Imaging\u003c\/h3\u003e\n\u003cp\u003eThis filter module is primarily an imaging system due to the nature of the Ca-K wavelength. Positioned at the edge of the visible spectrum in the deep violet, many observers cannot easily perceive its contrast due to the natural yellowing of the human cornea over time. Cameras, however, are highly sensitive at 393.4 nm and can record stunning detail. The filter's \u0026lt;2.4 Angstrom bandpass ensures that only this specific wavelength reaches your sensor, rejecting other light to maximize the contrast of faint chromospheric features.\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 12mm B1200 Module and Your Telescope\u003c\/h3\u003e\n\u003cp\u003eLunt's B1200 Ca-K module is designed for versatility, allowing you to convert most standard nighttime refractors or a Lunt Modular Telescope into a specialized solar scope. The 12mm blocking filter provides a generous field for imaging with a wide range of telescopes and cameras. You can select the housing that best fits your workflow: a 2\" star diagonal for a more comfortable imaging angle, or a 2\" straight-thru tube for a direct optical path. Both housings feature a T2 thread for secure camera attachment.\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 Lunt B1200 CaK filter recommended for imaging over visual use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Calcium K line is at \u003cstrong\u003e393.4 nm\u003c\/strong\u003e, a deep violet color at the edge of the visible spectrum. Many people have difficulty seeing fine details at this wavelength due to natural aging of the eye. Cameras are far more sensitive to this light, allowing them to capture high-contrast details like supergranulation that are often invisible to the eye.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat solar features does the Lunt B1200 CaK filter show that H-alpha filters do not?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt B1200 CaK filter shows a \u003cstrong\u003edifferent, lower, and cooler layer of the chromosphere\u003c\/strong\u003e. It excels at revealing the \"cobblestone\" pattern of \u003cstrong\u003esupergranulation cells\u003c\/strong\u003e across the solar surface, which are particularly bright and defined around sunspots and active regions. H-alpha, in contrast, is better for viewing prominences, filaments, and details in the upper chromosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt B1200 CaK module with my 100mm f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Lunt B1200 CaK module is designed to work with most standard nighttime refractors. A 100mm f\/7 refractor is an excellent choice for this filter, providing enough aperture to resolve fine details within the Ca-K line. The 12mm blocking filter is well-matched to the focal length, ensuring the full solar disk is illuminated on your camera sensor.\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 diagonal and straight-thru versions of the B1200 CaK filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice depends on your ergonomic preference and imaging setup.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003e2\" star diagonal\u003c\/strong\u003e version places your camera at a 90-degree angle, which can be more comfortable and may help with clearance issues on certain mounts.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003e2\" straight-thru tube\u003c\/strong\u003e version keeps the camera directly in line with the telescope, providing a straight optical path which some imagers prefer for simplicity and alignment.\u003c\/li\u003e\n\u003c\/ul\u003e\nBoth versions contain the same B1200 CaK filter and offer a T2 thread for camera connection.\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see more detail with the Lunt B1200 CaK if I've had cataract surgery?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is often reported that individuals who have had cataract surgery can see significantly more detail in the Ca-K line. The surgery replaces the eye's natural lens, which may have yellowed with age, with a clear artificial lens that transmits more of the violet 393.4 nm light. However, even with this advantage, imaging is still the recommended method for capturing the full range of detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Lunt B1200 CaK filter help in studying a complex sunspot region?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile white light filters show the dark umbra of a sunspot, the Lunt B1200 CaK filter reveals the associated magnetic activity in the chromosphere above it. You will be able to image the bright, magnetically-contained plasma (plage) surrounding the sunspot, providing context and showing the extent of the active region that is invisible in white light or even H-alpha.\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\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e393.4 nm (Calcium K)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.4 Angstroms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter Aperture\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Options\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal or 2\" Straight-Thru Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003e2\" Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eT2 Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003eLS6CaKMD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eLS12CaKMD\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\"\u003eB1200 CaK Blocking Filter Module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003ein selected housing (Star Diagonal or Straight-Thru Tube)\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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"2\" in Star diagonal with T2 connection","offer_id":44967534330141,"sku":"LSS-LS12CaKMDd","price":2093.0,"currency_code":"CAD","in_stock":true},{"title":"2\" in Straight Thru 2\" tube with T2 \u0026 2\" connection","offer_id":44967534362909,"sku":"LSS-LS12CaKMDs","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Calcium-K-B1800-Diagonal-Straight-Through__79606.1598232122.1280.1280.jpg?v=1684343590"},{"product_id":"lunt-b1800-calcium-k-blocking-filter","title":"Lunt B1800 Calcium K Blocking Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIsolates the 393.4 nm Calcium K emission line\u003c\/li\u003e\n\u003cli\u003eBandpass of less than 2.4 Angstroms for high-contrast views\u003c\/li\u003e\n\u003cli\u003e18mm clear aperture blocking filter\u003c\/li\u003e\n\u003cli\u003eFits standard 2-inch focusers with T2 camera threads\u003c\/li\u003e\n\u003cli\u003eConverts a standard nighttime refractor for solar imaging\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\u003eLunt B1800 Calcium K Blocking Filter\u003c\/h2\u003e\n\u003cp\u003eThe Lunt B1800 Calcium K Blocking Filter isolates the 393.4 nm emission line with a narrow sub-2.4 Angstrom bandpass, revealing a dynamic layer of the Sun's chromosphere often missed by other filters. This 18mm blocking filter module is designed as a dedicated imaging system, fitting into a standard 2-inch focuser to convert your nighttime refractor into a specialized solar instrument for studying solar magnetism.\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 Calcium K Line: Imaging Solar Magnetism at 393.4 nm\u003c\/h3\u003e\n\u003cp\u003eThis filter is precisely centered on the Calcium K (Ca-K) line at 393.4 nm, a wavelength produced by calcium ions just at the violet edge of the visible spectrum. This emission reveals a layer of the chromosphere that is slightly lower and cooler than what is seen in Hydrogen-alpha, providing a complementary view of solar activity. Ca-K imaging excels at showing super granulation cells and is particularly sensitive to areas of high magnetic fields, making sunspots and surrounding active regions appear with dramatic brightness and structure.\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\u003eA Sub-2.4 Angstrom Bandpass for High-Contrast Chromosphere Imaging\u003c\/h3\u003e\n\u003cp\u003eTo isolate the faint details within the Ca-K line, the Lunt B1800 employs an internal narrowband filter with a bandpass of less than 2.4 Angstroms. This tight specification is critical for rejecting overwhelming continuum light from the photosphere, allowing the faint chromospheric network and plage to stand out with sharp contrast. The result is a dark, clean background against which the brightest, most magnetically active solar features are rendered in stunning detail by your camera.\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\u003eOptimized for 393.4 nm Imaging: Why Ca-K Favors the Camera Sensor\u003c\/h3\u003e\n\u003cp\u003eThe 393.4 nm Ca-K wavelength is notoriously difficult for the human eye to perceive with high contrast. As we age, the cornea naturally yellows, filtering out the deep violet light where Ca-K resides. For this reason, the B1800 is primarily an imaging system, as modern camera sensors are highly sensitive to this wavelength and can capture incredible detail that is visually inaccessible to most observers. While some individuals, particularly those who have had cataract surgery, may see more detail, the most rewarding results from this filter will come from photography.\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\u003eFlexible Integration: 2-inch and T2 Connections for Standard Refractors\u003c\/h3\u003e\n\u003cp\u003eDesigned for versatility, the Lunt B1800 Ca-K module can convert most standard nighttime refractors into a capable Ca-K solar telescope. It is available in housings that slide into any 2-inch focuser and provide industry-standard T2 (M42x0.75) threads for direct, secure attachment of most astronomy cameras. This ensures a solid imaging train, whether you choose the straight-through or star diagonal configuration, allowing you to focus on capturing the dynamic solar surface.\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\"\u003eCan I use the Lunt B1800 Ca-K filter for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt B1800 Ca-K filter is designed primarily as an \u003cstrong\u003eimaging system\u003c\/strong\u003e. The 393.4 nm wavelength is deep in the violet part of the spectrum, where most people have very low visual contrast sensitivity. While you may see a violet disk, the fine details like super granulation are best captured with a camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope do I need for the Lunt B1800 Ca-K filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter module is designed to work with most standard \u003cstrong\u003enighttime refractor telescopes\u003c\/strong\u003e. It can also be used with Lunt's Modular Telescopes when they are configured for nighttime use. It is not a standalone filter and requires a telescope to function.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the view in Calcium K with the Lunt B1800 differ from Hydrogen-alpha?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCalcium K shows a lower, cooler layer of the chromosphere than Hydrogen-alpha. While H-alpha is excellent for prominences and surface filaments, Ca-K excels at highlighting areas of strong magnetic fields. This makes \u003cstrong\u003esunspots and their surrounding active regions (plage)\u003c\/strong\u003e appear as intensely bright areas, offering a different and complementary perspective on solar activity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat specific solar features will the Lunt B1800 Ca-K filter show on an active Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDuring periods of high solar activity, the Lunt B1800 Ca-K filter will reveal a wealth of detail. You can expect to image:\u003cbr\u003e\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBright Plage:\u003c\/strong\u003e The bright, complex regions surrounding sunspot groups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunspots:\u003c\/strong\u003e Displayed with high contrast against the surrounding plage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupergranulation Network:\u003c\/strong\u003e The large-scale convection cell pattern across the solar disk.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Lunt B1800 Ca-K filter work with my 100mm f\/7 refractor for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, a 100mm f\/7 refractor is an excellent choice for use with the Lunt B1800 Ca-K filter. The 18mm blocking filter provides full-disk illumination for telescopes with focal lengths up to 1800mm, so your 700mm focal length scope is well within the ideal range for capturing the entire Sun in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Lunt B1800 Ca-K filter's bandpass \u0026lt;2.4 Angstroms?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe sub-2.4 Angstrom bandpass is essential for achieving high contrast. The Sun's photosphere is incredibly bright, and this light would wash out the faint details of the chromosphere. The narrow bandpass blocks this unwanted light, allowing only the specific \u003cstrong\u003e393.4 nm Ca-K wavelength\u003c\/strong\u003e to reach the camera sensor, dramatically improving image contrast.\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\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e393.4 nm (Calcium K)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2.4 Angstroms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter Aperture\u003c\/td\u003e\n\u003ctd\u003e18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Options\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal or 2\" Straight-Through Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eT2 (M42x0.75) Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003eRefractor Telescopes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eLS12CaKMD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003eLS6CaKMD\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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"2\" in Star diagonal with T2 connection","offer_id":44967534428445,"sku":"LSS-LS18CaKMDd","price":2373.0,"currency_code":"CAD","in_stock":true},{"title":"2\" in Straight Thru 2\" tube with T2 \u0026 2\" connection","offer_id":44967534461213,"sku":"LSS-LS18CaKMDs","price":2373.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Calcium-K-B1800-Diagonal-Straight-Through__09195.1598232050.1280.1280.jpg?v=1684343597"},{"product_id":"lunt-high-resolution-h-alpha-filter-for-ds-modules","title":"Lunt High Resolution H-alpha Filter for DS Modules","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for 80mm and 100mm Lunt Double-Stack Systems\u003c\/li\u003e\n\u003cli\u003eEnhances Contrast for High-Resolution Solar Imaging\u003c\/li\u003e\n\u003cli\u003eReduces Faint Background Glow\u003c\/li\u003e\n\u003cli\u003eImproves Visibility of Solar Prominences and Limb Detail\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eLunt High Resolution H-alpha Filter for DS Modules\u003c\/h2\u003e\n      \u003cp\u003eDesigned for Lunt's 80mm and 100mm internal double-stack systems, the Lunt High Resolution H-alpha Filter is a critical upgrade for solar imagers seeking maximum contrast on the solar limb. This filter specifically targets the faint background glow inherent in double-stacking, improving the visibility of fine prominence structures and surface details in both the 80mm and 100mm apertures.\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\u003eSuppressing Background Glow in Lunt Double-Stack Systems\u003c\/h3\u003e\n      \u003cp\u003eAn internal double-stack (DS) system dramatically increases contrast on the Sun's chromosphere, but it introduces a faint, out-of-band glow. The Lunt High Resolution Filter is engineered to suppress this specific background signal. By filtering out this unwanted light, the sky background around the Sun becomes darker, making faint prominences stand out with greater clarity.\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\u003eOptimizing Your System for Solar Prominence Imaging\u003c\/h3\u003e\n      \u003cp\u003eThis filter is an essential tool for imagers focused on capturing the dynamic, intricate details at the Sun's edge. Because prominences are viewed against the blackness of space, any reduction in background glow directly translates to a higher signal-to-noise ratio in your final image. The result is sharper, more defined filaments and eruptive events, revealing structure that would otherwise be lost in the faint haze.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Lunt High Resolution H-alpha Filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Lunt High Resolution Filter is designed as an add-on for Lunt's internal double-stack (DS) solar systems. Its sole function is to \u003cstrong\u003ereduce the faint background glow\u003c\/strong\u003e that is an inherent characteristic of DS systems, thereby increasing contrast for imaging, particularly on faint solar prominences and limb details.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt High Resolution Filter necessary for visual observing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile it can darken the background slightly for visual use, this filter is primarily designed for \u003cstrong\u003esolar imaging\u003c\/strong\u003e. The benefits are most apparent in processed images where faint signals can be separated from background noise. For purely visual observers, the effect may be too subtle to justify the addition.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Lunt High Resolution Filter improve my images of a solar flare with an 80mm Lunt telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhen imaging a dynamic event like a solar flare or eruptive prominence with your 80mm Lunt DS system, the High Resolution Filter helps by producing a darker background. This allows you to capture the faintest, outermost loops and plasma structures of the flare, which might otherwise be lost in the residual glow of the double-stack system.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Lunt High Resolution Filter change the bandpass of my double-stack system?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this filter does not alter the fundamental bandpass of your primary etalon or double-stack module. It is an out-of-band rejection filter, meaning it works by blocking faint light outside the desired H-alpha wavelength, effectively \"cleaning up\" the image without narrowing the bandpass itself.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging the solar limb with a 100mm Lunt DS system. Will this filter help resolve fine spicules?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Spicules are fine, jet-like structures on the solar limb that require high contrast to be seen clearly. By suppressing the background glow with the Lunt High Resolution Filter on your 100mm DS scope, you increase the contrast between the spicules and the background, making them easier to resolve and capture in your images.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt High Resolution Filter compatible with single-stack systems or non-Lunt telescopes?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis filter is specifically designed to address an artifact of \u003cstrong\u003eLunt's internal double-stack systems\u003c\/strong\u003e. It is not intended for, and will not provide a significant benefit to, single-stack solar setups or telescopes from other manufacturers.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAvailable Apertures\u003c\/td\u003e\n\u003ctd\u003e80mm, 100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGTIN (80mm)\u003c\/td\u003e\n\u003ctd\u003eHRG\/80DS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMPN (100mm)\u003c\/td\u003e\n\u003ctd\u003eHRG\/100DS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eLunt Solar Systems Internal Double Stack (DS) Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eLunt High Resolution H-alpha 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\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"80mm","offer_id":44967542194461,"sku":"LSS-HRG\/80","price":377.0,"currency_code":"CAD","in_stock":true},{"title":"100mm","offer_id":44967542227229,"sku":"LSS-HRG\/100","price":349.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-High-Resolution-Filter-1__88947.1598214811.1280.1280.jpg?v=1684343669"},{"product_id":"apm-solar-filter-set-for-apm-100-binoculars","title":"APM Solar Filter Set for APM 100 Binoculars","description":"\u003c!-- more --\u003eAPM Solar Filter Set for APM 100 Binoculars","brand":"APM","offers":[{"title":"Default Title","offer_id":44967655309597,"sku":"APM-EMC-600-125","price":154.0,"currency_code":"CAD","in_stock":false}]},{"product_id":"apm-solar-filter-set-for-apm-120-binoculars","title":"APM Solar Filter Set for APM 120 Binoculars","description":"\u003c!-- more --\u003eAPM Solar Filter Set for APM 120 Binoculars","brand":"APM","offers":[{"title":"Default Title","offer_id":44967655342365,"sku":"APM-EMC-600-128","price":227.0,"currency_code":"CAD","in_stock":false}]},{"product_id":"apm-solar-filter-set-for-apm-150-binoculars","title":"APM Solar Filter Set for APM 150 Binoculars","description":"\u003c!-- more --\u003eAPM Solar Filter Set for APM 150 Binoculars","brand":"APM","offers":[{"title":"Default Title","offer_id":44967655440669,"sku":"APM-EMC-600-129","price":269.0,"currency_code":"CAD","in_stock":false}]},{"product_id":"antlia-imaging-herschel-wedge-with-cak-3nm-filter-1-25","title":"Antlia Imaging Herschel Wedge with CaK 3nm Filter - 1.25\"","description":"\u003c!-- more --\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAntlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Antlia Solar Wedge (Herschel Wedge design) replaces the standard prism diagonal at the rear of refractor telescopes to enable imaging of solar granulation and sunspots. The Herschel Wedge design is well known to give sharper, higher-contrast images. The Antlia Solar Wedge design transmits a greatly reduced, safe amount of light to your imaging camera. The image brightness can be conveniently increased or decreased using a control ring with aperture blades, similar to that used in camera lenses.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-CaK-Herschel-Wedge-Description.jpg?v=1687359077\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOur Herschel Wedge is produced using CNC machining and the optical components are multi-coated with anti-reflection coatings to minimize both internal reflections and contrast reducing stray light. The solar wedge incorporates an Antlia 3nm narrow bandpass filter at the Calcium II K-Line centered on 393.3nm and mounted in a standard 1.25’’ holder.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eUnlike some other solar wedge designs which may get too hot, the Antlia Imaging Solar Wedge directs energy into an extra thick Polycrystalline Ceramic diffuser plate at the rear of the Wedge. In addition, cooling vents above the ceramic plate facilitate efficient cooling of the system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Antlia Cak 3nm solar prism system provides for the safe management of harmful light intensity and heat when imaging the sun. The system is comprised of a prism, Cak lens filter, sun centering finder and a heat dissipation system. The sun’s light passes through the right-angle prism and excess heat is transferred to the rear fins that act as a heat sink for cooling the instrument. This heat management system effectively keeps the the instrument at safe operating temperatures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eApplication and Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eType of build: Herschel 35mm prism\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIntegrated ceramic heat dispersion diffuser\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSharp CaK 3nm 393.3nm solar filter screwed into eyepiece holder base\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHigh-resolution imaging of granulation, sunspots, and other features\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIncludes a brightness control, a solar finder and effective heat dissipation system\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAnti Reflection (AR) coated prism and solar filter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHigh blocking specification to reject solar heat ingress\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSturdy CNC machined construction\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCaK 3nm 393.3nm Filter Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Antlia Solar Wedge prism and internal CaK solar filter are made of heat resistant double-polished substrate. Antlia CaK 393.3nm solar filter uses the most advanced multicoatings to produce a sharp 3nm narrow bandpass, designed to maximize contrast for high-resolution imaging of sun spots, solar surface granulation and other features that are prominent in CaK light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA high blocking specification of OD5 (0.001%) between 200-1200nm wavelengths and OD3 (0.1%) between 1200-1500nm wavelengths delivers superb resolution for imaging with the Antlia Cak 3nm solar filter.   It should be noted that the bandpass for Cak (393nm) makes solar features almost invisible to human vision because of the eye's low sensitivity and poor resolving ability at the CaK frequency. Hence, the Antlia Solar Wedge with CaK filter is not recommended for visual observation. It is designed for imaging with cameras that have spectral responses well beyond human vision.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNever look into the sun with the K-Line filter alone, although you don’t perceive it, there is a lot of harmful UV radiation entering your eye.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePlease note:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Antlia Herschel Wedge is intended for imaging ONLY. It is not suitable for visual observation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is not intended for solar prominence imaging and visual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMust only be used with refractor telescopes to avoid damage to the unit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRefractor aperture must be no larger than 120mm or, focal ratio of F5.5 or longer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNever use the Solar wedge without the supplied narrowband filter. Otherwise irreparable eye damage can result.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDisassembly of prism is prohibited and voids warranty. Any repair\/returns\/exchange for this item is not accepted once it has been disassembled.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWarranty guarantee: 1 year\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45189371789597,"sku":"ANT-CAK-WEDGE","price":481.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-CaK-Herschel-Wedge.jpg?v=1687359091"},{"product_id":"seestar-s50-replacement-solar-filter","title":"Seestar S50 Replacement Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for the Seestar S50\u003c\/li\u003e\n\u003cli\u003eEssential to capture images of the Sun with the Seestar S50\u003c\/li\u003e\n\u003cli\u003eDurable Polymer Film\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003c!-- Title image text --\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003c!-- Main Image --\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSeestar S50 Replacement Solar Filter - Overview\u003c\/h2\u003e\n\u003cp\u003eThis filter is included with the Seestar S50, but we offer it separately — ideal if you need a replacement or want to keep a spare on hand. Specifically designed to protect your Seestar S50’s sensor while allowing you to capture stunning images of the Sun, including fascinating details like sunspots.\u003c\/p\u003e\n\u003cp\u003eDo not point the Seestar S50 at the Sun without this solar filter securely attached. Observing without proper protection will permanently damage the telescope’s sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\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\u003e\n\u003cp\u003eCompatibility\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSeestar S50\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter type\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eWhite light\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Add more rows as needed --\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\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Seestar-s50-Replacement-Solar-Filter.webp?v=1734121631\" alt=\"Replacement solar filter\" class=\"DAV-img-box\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSolar 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!-- Add more items as needed --\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seestar","offers":[{"title":"Default Title","offer_id":49459540951325,"sku":"ZWO-SS-SOLAR50","price":36.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Seestar-s50-Replacement-Solar-Filter.webp?v=1734121631"},{"product_id":"daystar-quark-combo-gemini-chrom-prom-switchable-solar-filter","title":"Daystar Quark Combo Gemini Chrom\/Prom Switchable Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInstantly Switchable Prominence \u0026amp; Chromosphere Views\u003c\/li\u003e\n\u003cli\u003eContains Two Internal Fabry-Perot Etalon Filters\u003c\/li\u003e\n\u003cli\u003eOptimized for Telescopes from f\/15 to f\/30\u003c\/li\u003e\n\u003cli\u003eAR Coated for the 656nm Hydrogen-alpha Wavelength\u003c\/li\u003e\n\u003cli\u003eCompact, All-in-One Eyepiece-Sized Form Factor\u003c\/li\u003e\n\u003cli\u003eRequires Telescope-Specific Energy Rejection Filter (Sold Separately)\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\u003eDaystar Quark Combo Gemini Chrom\/Prom Switchable Solar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark Combo Gemini integrates two separate, dedicated Fabry-Perot etalon elements tuned for the 656nm hydrogen-alpha line, allowing you to instantly switch between prominence and chromosphere views in telescopes operating from f\/15 to f\/30. This all-in-one design eliminates the need to swap filters or refocus, providing unmatched flexibility for observing and imaging the dynamic solar 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\u003eInstant Prominence and Chromosphere Views: A Dual 656nm Etalon System\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Combo Gemini are two distinct etalon filters, accessible via a simple push-pull slider arm. One filter is qualified to deliver the best views of broad, expansive prominences erupting from the solar limb, while the other is optimized for the high-contrast surface details of the chromosphere. This dual-system allows for immediate, real-time comparison between the two views without ever removing the filter from the telescope.\u003c\/p\u003e\n\u003cp\u003eInstead of designating a specific FWHM bandpass, Daystar qualifies each element visually to ensure optimal results for its intended purpose. This approach guarantees you see prominences with maximum extent and surface granulation with maximum contrast, tailored to the final application in your specific f\/15 to f\/30 telescope.\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\u003eOptimized for f\/15-f\/30: Integrating the Gemini with Your Telescope\u003c\/h3\u003e\n\u003cp\u003eThe Quark Combo Gemini is engineered for long focal ratio systems, specifically Schmidt-Cassegrains, Maksutovs, and refractors operating between f\/15 and f\/30. Proper and safe integration requires additional, telescope-specific components that are sold separately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCT \u0026amp; Maksutov Telescopes:\u003c\/strong\u003e Safe operation requires a front-mounted Energy Rejection Filter (ERF). For SCTs, an off-axis, aperture-reducing ERF is necessary to slow the telescope's native focal ratio and prevent heat buildup. Maksutovs at a native f\/15 do not require aperture reduction but still need a full-aperture front ERF for thermal safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefractor Telescopes:\u003c\/strong\u003e To bring a faster refractor into the required f\/15-f\/30 range, you must use a telecentric barlow, such as Daystar's 2.8x or 4.3x models, between the diagonal and the Quark.\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\u003eA Compact, 656nm All-in-One Design for Field Use\u003c\/h3\u003e\n\u003cp\u003eDaystar consolidated the entire dual-filter system into a single, lightweight device with the footprint of a large eyepiece. This streamlined design eliminates the cost and weight of adapters and separate filter housings. Internal baffles and AR coatings optimized for the 656nm wavelength work together to maximize image contrast.\u003c\/p\u003e\n\u003cp\u003eThe design also features reduced power consumption, allowing the Quark's internal heating element to run all day from a small, palm-sized USB battery pack (sold separately). This makes the Combo Gemini an ideal solution for field observers, educational outreach, and remote imaging setups where portability and efficiency are key.\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\u003eA Tool for Outreach and Imaging: Demonstrating Solar Dynamics at 656nm\u003c\/h3\u003e\n\u003cp\u003eThe ability to switch instantly between views is a powerful tool. For outreach astronomers, it creates a compelling teaching moment, allowing you to demonstrate the difference between limb phenomena and surface features with a simple push of the slider. You can even show the effects of wing-shifting on fast-moving prominences.\u003c\/p\u003e\n\u003cp\u003eFor solar imagers, the Combo Gemini is a significant time-saver. You can capture high-contrast chromosphere images and wider-band prominence images of a fleeting solar feature in rapid succession, without the risk of losing the target or focus while swapping equipment. This ensures your comparison images are perfectly matched and captured under the same seeing conditions.\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 main advantage of the Daystar Quark Combo Gemini over using two separate filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is the ability to \u003cstrong\u003einstantly switch\u003c\/strong\u003e between a prominence-optimized view and a chromosphere-optimized view without changing equipment or refocusing. This allows for direct comparison of solar features and is ideal for imaging transient events or for educational demonstrations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an Energy Rejection Filter (ERF) to use the Quark Combo Gemini with my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, an ERF is absolutely required for safety and performance.\u003c\/strong\u003e For an SCT like a C8, you must use a front-mounted, off-axis, aperture-reducing ERF. This accessory serves two critical functions: it prevents dangerous heat from entering the telescope and it slows the optical system to the f\/15-f\/30 range required by the Quark for optimal contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Daystar Quark Combo Gemini with my f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo use the Quark Combo Gemini with a faster refractor, you must place a telecentric Barlow lens in the optical path to increase the focal ratio to the required f\/15-f\/30 range. Daystar offers compatible \u003cstrong\u003e2.8x or 4.3x telecentric Barlows\u003c\/strong\u003e (sold separately) for this purpose. An f\/7 refractor with a 2.8x telecentric would operate at f\/19.6, which is ideal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy doesn't Daystar specify an exact FWHM bandpass for the Quark Combo Gemini's two modes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDaystar qualifies the etalon in each mode based on its visual performance for a specific task, not a rigid numerical specification. The \"prominence\" setting is tuned to be slightly wider to show faint, extended structures, while the \"chromosphere\" setting is tuned to be narrower for maximum surface contrast. The final bandpass is dependent on the host telescope's focal ratio, so qualifying for the visual result ensures optimal views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Quark Combo Gemini for imaging solar prominences and then the chromosphere without refocusing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The dual-etalon system is designed to be parfocal. You can slide the filter from the prominence position to the chromosphere position and begin imaging immediately without needing to adjust your camera's focus, saving critical time when capturing fast-changing solar events.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of power supply does the Daystar Quark Combo Gemini require?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Quark Combo Gemini has low power requirements and is powered via a standard USB connection. It can be run from any standard USB power source, including a wall adapter or a small, portable USB battery pack, making it highly convenient for use in the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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\/Daystar_Filters_Combo_Quark_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\"\u003eDownload 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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":50869790245149,"sku":"DAY-DSZGC","price":3633.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/GeminiCombo.jpg?v=1769013927"},{"product_id":"lunt-40mm-double-stack-solar-filter-for-ls40tha","title":"Lunt 40mm Double Stack Solar Filter for LS40THa","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDouble-stack upgrade for Lunt LS40THa telescopes\u003c\/li\u003e\n\u003cli\u003eReduces system bandpass to \u0026lt;0.29Å\u003c\/li\u003e\n\u003cli\u003e40mm clear aperture\u003c\/li\u003e\n\u003cli\u003eFront-mounted, tilt-tuned etalon\u003c\/li\u003e\n\u003cli\u003eReveals high-contrast chromospheric detail\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\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\u003eLunt 40mm Double Stack Solar Filter for LS40THa\u003c\/h2\u003e\n      \u003cp\u003eThe Lunt 40mm Double Stack Solar Filter is the definitive contrast-enhancing upgrade for your LS40THa telescope, adding a second 40mm front-mounted etalon to slash the system's final bandpass to an exceptionally narrow \u0026lt;0.29Å. By placing two precision etalons in series, this filter dramatically increases contrast on solar surface features, transforming the Sun from a flat disk into a dynamic, three-dimensional sphere.\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\u003eDouble-Stacking the LS40THa for \u0026lt;0.29Å Bandpass\u003c\/h3\u003e\n      \u003cp\u003eThis filter adds a second, perfectly matched 40mm etalon to the front of your existing LS40THa solar telescope. The two filters working in series create a combined system bandpass of less than 0.29Å — the tightest available in any Lunt double-stack configuration. Installation is simple, requiring no tools or a return to the factory, allowing you to upgrade your view in minutes.\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\u003eRevealing High-Contrast Chromospheric Detail at \u0026lt;0.29Å\u003c\/h3\u003e\n      \u003cp\u003eThe significant bandpass reduction is not just a number; it translates directly to a stark increase in visible surface detail. With the LS40FHa installed, the solar chromosphere is rendered with striking clarity. Plage boundaries sharpen into cellular networks, dark filaments reveal their multi-strand internal structure, and the delicate threading within solar prominences becomes visible from base to tip.\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\u003eStandalone H-Alpha Filtration and Critical Safety Requirements\u003c\/h3\u003e\n      \u003cp\u003eWhile designed as an upgrade for the LS40THa, the LS40FHa can also serve as a primary H-alpha filter for a compatible customer-supplied refractor. However, for safe operation in any configuration, a Lunt blocking filter is mandatory. The LS40FHa etalon alone is not a complete safety device and must be paired with an appropriate blocking filter to prevent irreversible eye damage.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Lunt 40mm Double Stack Filter on my LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eInstallation is straightforward and requires no tools. The LS40FHa filter simply threads onto the front objective of your existing Lunt LS40THa telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main visual benefit of double-stacking my LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary benefit is a dramatic increase in \u003cstrong\u003esurface contrast\u003c\/strong\u003e. The tighter \u0026lt;0.29Å bandpass makes features like filaments, plage, and granulation \"pop\" against the solar disk, revealing details that are subtle or invisible in a single-stack system.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt LS40FHa filter on a telescope other than the LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it can be used as a standalone H-alpha filter on a compatible refractor. However, you \u003cstrong\u003emust\u003c\/strong\u003e pair it with a correctly sized Lunt blocking filter for safe solar observation. The etalon by itself is not sufficient for eye safety.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs a blocking filter included with the Lunt 40mm Double Stack Filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This filter is designed as an add-on for the LS40THa telescope, which already includes a blocking filter. If you plan to use this on a different telescope, a separate Lunt blocking filter is required and must be purchased separately.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Lunt 40mm filter show more solar prominences than my single-stack LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt will not necessarily show more prominences, as they are often bright enough to be seen in a single-stack view. However, the double-stacked view at \u0026lt;0.29Å will reveal significantly more \u003cstrong\u003einternal detail, structure, and texture\u003c\/strong\u003e within those prominences, which often appear as uniform shapes in a wider bandpass.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the LS40FHa achieve such a narrow bandpass compared to other Lunt systems?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe LS40FHa achieves its exceptionally narrow \u0026lt;0.29Å bandpass by placing two front-mounted, tilt-tuned etalons in series. This specific configuration results in a tighter combined bandpass than Lunt systems that pair a front-mounted filter with an internal, pressure-tuned etalon.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eLS40FHaP\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSystem Bandpass (Double Stacked)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.29Å\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEtalon Type\u003c\/td\u003e\n\u003ctd\u003eFront-Mount, Tilt-Tuned\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003eLunt LS40THa Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003e40mm Double Stack Solar 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\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":50921462268189,"sku":"LSS-LS40FHa","price":973.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LSS-LS40FHa.png?v=1770413088"}],"url":"https:\/\/davidastro.com\/collections\/solar-filters.oembed?page=3","provider":"David Astro","version":"1.0","type":"link"}