{"product_id":"daystar-quark-chromosphere-solar-filter-with-free-baader-h-alpha-35nm-filter-2-pre-owned","title":"Daystar Quark Chromosphere Solar Filter with Free Baader H-alpha 35nm Filter 2\"! (Pre-owned)","description":"\u003cp\u003e\u003cspan style=\"color: rgb(251, 14, 14);\"\u003e\u003cstrong\u003eIn Excelllent Condition.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(251, 14, 14);\"\u003e\u003cstrong\u003eIncludes Free Baader H-alpha 35nm Filter 2\" worth $280!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e~0.3Å – 0.5Å (Angstroms)\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\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarlow Factor\u003c\/td\u003e\n\u003ctd\u003e4.2x Telecentric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio Limit\u003c\/td\u003e\n\u003ctd\u003eBest performance at output F\/15 to F\/30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull Disk Capacity\u003c\/td\u003e\n\u003ctd\u003ePossible on scopes with FL \u0026lt; 450mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Input\u003c\/td\u003e\n\u003ctd\u003eUSB 5V, 1.5A min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Connector\u003c\/td\u003e\n\u003ctd\u003eMicro-USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Interface\u003c\/td\u003e\n\u003ctd\u003e1.25\" or 2\" Combo Nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Holder\u003c\/td\u003e\n\u003ctd\u003e1.25\" with brass compression ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~0.4 kg (0.9 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eDaystar Quark Chromoshpere Overview\u003c\/h2\u003e\n\u003cp\u003eThe Daystar Quark Chromosphere is the first Hydrogen-Alpha \"eyepiece\" filter that allows users to convert a standard refractor telescope into a high-fidelity solar observatory. Unlike traditional solar telescopes, the Quark is an all-in-one component that combines a 4.2x telecentric Barlow, a 12mm blocking filter, a 21mm clear filter aperture and a high-grade etalon into a single chassis.\u003c\/p\u003e\n\u003cp\u003eThe Chromosphere model features a narrower bandpass (typically 0.3Å – 0.5Å), specifically tuned to reveal high-contrast surface details, including active regions, filaments, and super-granulation, while still maintaining the ability to view prominences on the solar limb.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eIntegrated 4.2x Telecentric Barlow\u003c\/h3\u003e\n\u003cp\u003eThe Quark’s built-in 4.2× telecentric lens is custom-engineered to optimize performance with the internal etalon. It increases your telescope’s effective focal ratio to the ideal F\/15–F\/30 range, ensuring the etalon operates at its designed precision.\u003c\/p\u003e\n\u003cp\u003eBy delivering a truly telecentric light path, where light rays strike the etalon in parallel, the Quark maintains uniform spectral performance across the entire field. The result: consistent, edge-to-edge contrast and reliable chromosphere details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eElectronic Etalon Tuning\u003c\/h3\u003e\n\u003cp\u003eThe Quark features electronically controlled thermal tuning, using a precision heater to expand or contract the etalon cavity with Angstrom-level accuracy. This ensures stable, repeatable tuning without the drift associated with mechanical systems.\u003c\/p\u003e\n\u003cp\u003eBy adjusting the tuning knob, you can shift the passband slightly toward the red or blue wing of H-alpha. This \"Doppler tuning\" reveals motion in high-velocity solar plasma, letting you highlight structures moving toward or away from the observer and adding depth and dynamism to filaments, prominences, and active regions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eUniversal Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe Quark is designed to integrate seamlessly with a wide range of refractors and eyepieces. The upper barrel accepts any standard 1.25\" eyepiece, while the nosepiece fits both 1.25\" and 2\" focusers or diagonals, making setup straightforward on virtually any refractor.\u003c\/p\u003e\n\u003cp\u003eOptimized for instruments in the F\/4–F\/8 range, the Quark automatically brings them to the ideal solar H-alpha operating ratio. Refractors up to about 450 mm focal length can deliver full-disk views, while larger refractors—with no aperture restriction—provide higher-magnification, high-resolution solar detail.\u003c\/p\u003e\n\u003cp\u003eFor power, the Quark uses a standard Micro-USB input (5V, 1.5A) and can run from the supplied wall adapter or a portable USB battery pack, making it easy to use both in the backyard and 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-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eCritical Requirement: Energy Rejection (ERF)\u003c\/h3\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eProper heat management is essential. Incorrect use can damage the Quark or your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe Quark is a rear-mounted H-alpha filter, meaning all incoming solar energy first passes through your telescope before reaching the unit. To prevent overheating of internal optics, appropriate energy rejection is mandatory.\u003c\/p\u003e\n\u003ch4\u003eRefractors Up to 80 mm Aperture\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eRequirement:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eSimply put the Quark into the diagonal. No other heat management is required unless you do long tracking sessions, in which case use an UV\/IR cut filter.\u003c\/p\u003e\n\u003ch4\u003eRefractors from 80mm to 130mm Aperture\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003eRequirement:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eUse a UV\/IR Cut Filter.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePlacement:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eThread the UV\/IR filter onto the diagonal’s nosepiece, positioned ahead of the Quark.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFunction:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eReflects ultraviolet and infrared energy, reducing thermal load so the Quark operates safely.\u003c\/p\u003e\n\u003ch4\u003eRefractors Larger Than 130 mm (or for long tracking sessions)\u003c\/h4\u003e\n\u003cp\u003eWithout a front ERF on large apertures, concentrated solar energy can crack the Quark’s internal optics or damage diagonal mirrors.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRequirement:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eUse a Front-Mounted Energy Rejection Filter (ERF).\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePlacement:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eInstalled over the telescope’s objective lens.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFunction:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eRejects heat before it enters the tube, preventing damaging heat concentration at focus.\u003c\/p\u003e\n\u003ch4\u003eImportant Note for Petzval Telescopes and Scopes With Rear Lens Groups\u003c\/h4\u003e\n\u003cp\u003ePetzval refractors and any telescope with rear-mounted lens elements (e.g., reducers, correctors, flatteners built into the OTA) require additional caution. These designs place optics near the focal plane, where solar energy is highly concentrated.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRisk:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eRear lenses can overheat, delaminate, or crack under solar load.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRequirement:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eRegardless of its aperture, contact us or do some researches to see if your specific telescope must use a front-mounted ERF instead of the rear-mounted UV\/IR cut filter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eReason:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eA UV\/IR Cut filter placed near the diagonal is not sufficient, because the rear lens group absorbs the concentrated heat before the filter can reject it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eWhat You Can See: A Guide to Solar Features\u003c\/h3\u003e\n\u003cp\u003eThe Daystar Quark Chromosphere is tuned to the Hydrogen-Alpha line (656.3 nm), allowing you to see the \"living\" layer of the Sun just above the white-light surface. Below are the specific features you will observe.\u003c\/p\u003e\n\u003ch4\u003eA. Surface Features (On the Disk)\u003c\/h4\u003e\n\u003cp\u003eThe primary strength of the Chromosphere model is its high contrast on the solar face.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilaments:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThese appear as long, dark, snake-like ribbons winding across the solar disk. They are actually massive clouds of cool plasma suspended above the surface by magnetic fields.\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e(Note: When these rotate to the edge of the Sun, they become Prominences.)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Regions (ARs):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAreas of intense magnetic activity often surrounding sunspots. In H-Alpha, these look like bright, swirling patches of light (called\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePlage\u003c\/strong\u003e) that often resemble white lightning or glitter scattered on the surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunspots:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike white-light filters which show simple dark spots, the Quark reveals the complex magnetic turmoil\u003cspan\u003e \u003c\/span\u003e\u003cem\u003einside\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003ethe spot. You can often see the vortex of magnetic fibers twisting out from the dark core (umbra).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Flares:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSudden, brilliant eruptions that appear as intensely bright white patches within active regions. These can form in minutes and are the most energetic events in the solar system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe \"Orange Peel\" Surface:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe entire disk will have a textured, mottled appearance known as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eChromospheric Network\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor super-granulation, resembling the skin of an orange.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eB. Limb Features (The Edge of the Sun)\u003c\/h4\u003e\n\u003cp\u003eDespite being tuned for the surface, the Chromosphere model offers spectacular views of the solar edge.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProminences:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe \"crown jewels\" of solar observing. These are loops, trees, or hedges of glowing red plasma extending off the edge of the Sun against the blackness of space. They can be hundreds of thousands of kilometers high—large enough to fit dozens of Earths inside.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpicules:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIf you look closely at the limb, you will see it isn't smooth. It looks \"furry\" or \"grassy.\" These are spicules—jets of plasma shooting up 10,000 km into the atmosphere, lasting only 5–10 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurges:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOccasionally, you may see a straight jet of plasma shooting outward and then falling back down, often associated with small sub-flares.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eC. 3D Dynamics (Using the Tuning Knob)\u003c\/h4\u003e\n\u003cp\u003eBecause the Quark allows for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDoppler Tuning\u003c\/strong\u003e, you can visualize motion in 3D:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue Shift (Turning knob Left):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReveals material moving\u003cspan\u003e \u003c\/span\u003e\u003cem\u003etowards\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eyou. This is useful for seeing the base of an exploding flare or a surge headed in your direction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed Shift (Turning knob Right):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReveals material moving\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eaway\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003efrom you. This helps visualize cooling plasma raining back down onto the surface after an eruption.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":43630613758065,"sku":"USED071004","price":1169.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/daystar_quark_eyepiece_chromosphere_1.jpg?v=1783708554","url":"https:\/\/khanscope.com\/products\/daystar-quark-chromosphere-solar-filter-with-free-baader-h-alpha-35nm-filter-2-pre-owned","provider":"Khan Scope Centre","version":"1.0","type":"link"}