{"title":"Daystar H-Alpha \u0026 CaK Filters","description":"\u003cp\u003eDaystar H-alpha and calcium filters reveal the Sun's chromosphere: prominences, filaments, plages and active regions. Quark filters fit in the focuser of suitable refractors, with Chromosphere, Prominence, Combo and Gemini switchable models, while Quantum filters in SE grade serve dedicated H-alpha systems.\u003c\/p\u003e\u003cp\u003eThe collection also includes Calcium, Sodium and Magnesium Quarks for other solar lines, the Camera Quark, a Quark for Questar, and energy rejection filters for refractors and SCTs.\u003c\/p\u003e","products":[{"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":"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":"daystar-quantum-h-alpha-solar-filter-se-grade","title":"Daystar Quantum H-alpha Solar Filter - SE Grade","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eChoice of 0.7-0.9Å or 0.3-0.5Å Tunable Hydrogen-Alpha Bandpass\u003c\/li\u003e\n\u003cli\u003eSE (Standard Edition) Grade for Amateur and Academic Use\u003c\/li\u003e\n\u003cli\u003eLive LCD Wavelength Readout with 0.1Å Accuracy\u003c\/li\u003e\n\u003cli\u003eDigital Red\/Blue Wing Shift Tuning for Doppler Studies\u003c\/li\u003e\n\u003cli\u003e12VDC Operation for Field Use\u003c\/li\u003e\n\u003cli\u003eSerial Port for Computer Control\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 - SE Grade\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quantum SE brings precision Hydrogen-Alpha solar observation to any refractor, SCT, or Maksutov, in a choice of two tunable bandpasses: a brighter, more forgiving 0.7-0.9Å filter, or a 0.3-0.5Å filter for maximum contrast on the solar disk. Both share the same digital control system, with a live wavelength readout accurate to 0.1Å, and both run on 12VDC from the included 100-240V international adapter, making them ready for use anywhere in the world.\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\u003eTwo Bandpass Options: 0.7-0.9Å and 0.3-0.5Å\u003c\/h3\u003e\n\u003cp\u003eBoth filters are tunable across their stated range, so the choice is about where that range sits rather than whether the filter can be adjusted. A narrower passband raises contrast on the solar disk; a wider one passes more light and is easier to use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.7-0.9Å:\u003c\/strong\u003e the brighter, more versatile choice. The extra light throughput suits prominences on the limb, shorter exposures, smaller apertures, and visual observing in less than perfect seeing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.3-0.5Å:\u003c\/strong\u003e the high-contrast choice. The narrower passband isolates the chromosphere more tightly, pulling out filaments, plage, spicules and fine active-region structure on the disk that a wider bandpass washes out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eObservers who mainly image the solar disk tend to choose 0.3-0.5Å; observers who want one filter to do everything, including bright prominence views, tend to choose 0.7-0.9Å.\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 Digital Control with 0.1Å Accuracy\u003c\/h3\u003e\n\u003cp\u003eThis filter eliminates guesswork by displaying its exact wavelength output on a live LCD, accurate to 0.1Å. For dynamic events, red and blue wing shift buttons let you precisely tune the bandpass off the central H-alpha line. This capability is critical for Doppler studies, allowing you to observe the motion of plasma in solar flares and other active regions as it moves toward (blue shift) or away from (red shift) 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\u003e12VDC Field Operation and Computer Integration\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability, the Quantum SE runs on 12VDC power, making it compatible with common field batteries for observing away from home. For stationary setups, a 100-240V power supply with interchangeable wall plates for the US, Europe, UK, and Australia is included. A built-in serial port also allows for computer control, giving you the ability to display the filter's status and wavelength on-screen for remote or automated 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\u003eSE Grade: Professional-Level Features for Visual Astronomy\u003c\/h3\u003e\n\u003cp\u003eThe Quantum SE (Standard Edition) grade is engineered for the majority of amateur and academic applications. It meets Daystar's stringent quality control for all visual and most photographic uses, delivering the high-contrast, detailed views the Quantum series is known for. It provides access to advanced features like digital tuning without the stringent optical homogeneity required for specialized professional research.\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\u003eQuantum SE vs. PE Grade: Choosing the Right Filter\u003c\/h3\u003e\n\u003cp\u003eDaystar offers two tiers for its Quantum filters, and the choice depends entirely on your application.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantum PE (Professional Edition):\u003c\/strong\u003e The PE grade's advantage is its superior homogeneity and on-band transmittance values across the entire filter surface. This level of precision is required for professional research studies where quantifiable, uniform data is the primary goal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantum SE (Standard Edition):\u003c\/strong\u003e The SE grade is the ideal choice for visual observers and most amateur astrophotographers. It incorporates the same core digital control system and tuning capabilities as the PE grade, delivering scientifically valuable and visually stunning results for a wide range of solar astronomy pursuits.\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\"\u003eShould I choose the 0.7-0.9Å or the 0.3-0.5Å Quantum SE?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose \u003cstrong\u003e0.7-0.9Å\u003c\/strong\u003e if you want one brighter, more forgiving filter for both disk and prominence viewing, or if you are working at a smaller aperture or in average seeing. Choose \u003cstrong\u003e0.3-0.5Å\u003c\/strong\u003e if your priority is maximum contrast on disk features such as filaments, plage and spicules. Both are tunable within their range and share the same electronics and controls.\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 grade filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eQuantum SE\u003c\/strong\u003e grade is designed for amateur and academic visual observation and some photography. The \u003cstrong\u003ePE (Professional Edition)\u003c\/strong\u003e grade offers higher precision homogeneity and on-band transmittance required for professional research applications where perfectly uniform data across the sensor is critical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Quantum SE filter in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter operates on \u003cstrong\u003e12VDC\u003c\/strong\u003e, making it fully compatible with standard field batteries and portable power supplies. It also includes a universal 100-240V power adapter with international wall plates for home use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I use the Quantum SE filter's wing shift to observe a solar flare with my 100mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen observing a flare, which involves high-velocity plasma, you can use the red and blue wing shift buttons to tune the filter's bandpass off the central H-alpha line. This allows you to see \u003cstrong\u003eDoppler-shifted material\u003c\/strong\u003e moving towards you (blue-shifted) or away from you (red-shifted), revealing the flare's dynamic structure through your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the \"on-band\" green light on the Quantum SE filter signify?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe green indicator light confirms that the filter's internal etalon has reached its precise operational temperature and is transmitting the correct Hydrogen-alpha wavelength. This simple feature on the Quantum SE ensures you are ready to observe without any guesswork.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the Quantum SE filter with a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Quantum SE filter includes a \u003cstrong\u003eserial port\u003c\/strong\u003e that allows for computer control. This enables you to view the filter's wavelength readout on-screen and potentially automate tuning for Doppler studies or remote imaging sessions.\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\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eSE (Standard Edition)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e0.7Å - 0.9Å or 0.3Å - 0.5Å (tunable, by variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eDigital Red\/Blue Wing Shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Readout\u003c\/td\u003e\n\u003ctd\u003eLive LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReadout Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputer Connectivity\u003c\/td\u003e\n\u003ctd\u003eSerial Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eRefractors, SCTs, Maksutovs\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:\/\/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 Quantum Control 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":"0.7-0.9Å","offer_id":52935165182237,"sku":"DAY-QSE-P","price":7273.0,"currency_code":"CAD","in_stock":true},{"title":"0.3-0.5Å","offer_id":52935165215005,"sku":"DAY-QSE-C","price":12593.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/DaystarFilters-Quantum-Hydrogen-Alpha-0-7-0-9-SE-1_782049c3-f2de-4067-9312-63ab1c1523ea.jpg?v=1789520811"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/daystar-h-alpha-and-cak-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}