{"product_id":"daystar-quark-chromosphere-h-alpha-filter-with-player-one-1-25-erf-used","title":"DayStar Quark Chromosphere H-Alpha Filter with Player One 1.25\" ERF – Used","description":"\u003cp\u003e\u003cstrong\u003eUsed – Excellent Condition.\u003c\/strong\u003e A DayStar Quark Chromosphere hydrogen-alpha filter paired with a Player One 1.25\" ERF, less than a year old with very little use — it presents essentially as new. This is a complete, ready-to-observe solar setup at a meaningful saving over buying both new.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDayStar Quark Chromosphere H-alpha \"eyepiece\" filter\u003c\/li\u003e\n  \u003cli\u003ePlayer One Astronomy ERF 1.25\" S-series energy rejection filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCondition Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLess than a year old with very little use.\u003c\/li\u003e\n  \u003cli\u003eExcellent condition — no cosmetic or optical defects noted.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAbout the DayStar Quark Chromosphere\u003c\/h3\u003e\n\u003cp\u003eThe Quark is the filter that made serious hydrogen-alpha solar observing affordable. It's an all-in-one assembly — a custom DayStar 4.2x telecentric Barlow, the adapters and snouts, and a tuneable H-alpha etalon — that drops into the focuser of a standard refractor and turns it into a dedicated solar telescope. The Chromosphere model is the narrower-bandpass version, tuned for surface detail: filaments, plage, active-region structure and the fine mottling across the disc. It works with refractors from f\/4 to f\/9, and an internal heater lets you tune the bandpass on and off band from the built-in controller.\u003c\/p\u003e\n\u003cp\u003eThe Player One ERF included here is the piece people often forget to budget for. It sits ahead of the Quark, passes roughly 97% of visible light while rejecting UV and IR to OD4, and drops the thermal load on the filter — which means more stable images and a longer, happier life for the etalon. Ground from B270 glass to a PV 1\/4-wave wavefront, it doesn't cost you sharpness to gain that protection.\u003c\/p\u003e\n\u003cp\u003eBought new, these two come to $1,893.99. For full specifications, see our new \u003ca href=\"https:\/\/ontariotelescope.com\/products\/daystar-filters-quark-h-alpha-eyepiece-chromosphere-model\"\u003eDayStar Quark Chromosphere\u003c\/a\u003e and \u003ca href=\"https:\/\/ontariotelescope.com\/products\/erf-1-25-filter-s-series-for-quark-chromosphere\"\u003ePlayer One ERF 1.25\"\u003c\/a\u003e listings.\u003c\/p\u003e\n\n\u003ch3\u003eFinal Sale\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis item is sold as a Final Sale.\u003c\/strong\u003e All used equipment sales are final. Please review our \u003ca href=\"https:\/\/ontariotelescope.com\/pages\/terms-policy\"\u003eUsed Equipment Sale Policy\u003c\/a\u003e before purchasing.\u003c\/p\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":54011542175855,"sku":"DSZ4C-USED-PKG","price":1550.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/IMG_9100.jpg?v=1786385474","url":"https:\/\/ontariotelescope.com\/products\/daystar-quark-chromosphere-h-alpha-filter-with-player-one-1-25-erf-used","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}