{"title":"Solar \u0026 Energy Rejection Filters for Safe Observing | Telescope Wolves","description":"\u003cp data-start=\"301\" data-end=\"649\"\u003eSolar and energy rejection filters are essential for safe, high-quality solar observing. Solar filters reduce harmful sunlight, while energy rejection filters (ERFs) manage heat and protect telescope optics during imaging or visual observation. Together, they ensure safe, clear, and sharp views of the Sun in hydrogen-alpha and white-light setups.\u003c\/p\u003e\n\u003cp data-start=\"651\" data-end=\"964\"\u003eAt Telescope Wolves, our collection includes precision solar filters and ERFs designed for compatibility with a wide range of telescopes and solar observing systems. Each product is chosen for optical quality, thermal stability, and reliable performance, helping you safely explore solar features with confidence.\u003c\/p\u003e\n\u003ch2 data-start=\"971\" data-end=\"994\"\u003e\u003cbr\u003e\u003c\/h2\u003e","products":[{"product_id":"explore-scientific-solar-filter-sun-shade-for-galileoscope-refractor-telescope-kit-diysunfilter-shade","title":"Explore Scientific Solar Filter \u0026 Sun Shade for Galileoscope Refractor — Safe White-Light Solar Viewing","description":"\u003cp\u003eSafely observe the Sun with your Galileoscope. The Explore Scientific Solar Filter \u0026amp; Sun Shade (DIYSUNFILTER\/SHADE) lets you point your Galileoscope refractor at the Sun and safely observe sunspots, solar limb darkening, and surface detail in white light. Sunspot activity follows an 11-year cycle and right now is an exciting time to watch — no experience needed, just fit the filter and look. Never observe the Sun without a proper solar filter. Ships free to the US.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44476658941986,"sku":"DIYSUNFILTER","price":3.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/GScope_SuncCatcher_1_6b107a3a-8400-4d8b-a362-291933421c45.jpg?v=1761953865"},{"product_id":"explore-scientific-sun-catcher-variable-large-aperture-solar-filter","title":"Explore Scientific Sun Catcher Variable Large Aperture Solar Filter — Adjustable White-Light Filter for Any Telescope","description":"\u003cp\u003eSafe solar viewing that fits a wide range of telescopes. The Explore Scientific Sun Catcher Variable Large Aperture Solar Filter adjusts to fit a broad range of telescope tube diameters — making it a versatile, easy-to-use option for safely observing the Sun in white light. See sunspots, track their movement day to day, and watch the solar limb — all with complete safety. Solar observing is one of the most accessible daytime astronomy activities for the whole family. Ships free to the US.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"70mm \/ 80mm (for Refractors)","offer_id":44476659335202,"sku":"SC70\/80-00","price":19.99,"currency_code":"USD","in_stock":true},{"title":"80mm \/ 102mm (for ED APO and Doublet Refractors)","offer_id":44476659367970,"sku":"SC80 \/ 102-00","price":19.99,"currency_code":"USD","in_stock":true},{"title":"127mm (for the Comet Hunter)","offer_id":44476659400738,"sku":"SC127-00","price":29.99,"currency_code":"USD","in_stock":true},{"title":"150mm\/6\"","offer_id":44476659433506,"sku":"SC6-00","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Solar Filter for 152mm (for ED APO)","offer_id":44476659466274,"sku":"SC8-00","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Solar Filter for 9.25\" and 10\" Schmidt-Cassegrains","offer_id":44476659499042,"sku":"SC9.25 \/ 10-00","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Solar Filter for telescopes up to 11\" Diameter","offer_id":44476659531810,"sku":"SC11 \/ 12-00","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Solar Filter for 14\" Schmidt-Cassegrains","offer_id":44476659564578,"sku":"SC14-00","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/SolarFilter_Combo_Right_Tight_grande_5342c520-f387-4924-a64c-efd26ca0fbf7.jpg?v=1781273143"},{"product_id":"explore-scientific-dwarf-ii-nd-solar-filter-set-2-piece-solar-imaging-filters-es-dii-solar","title":"Explore Scientific DWARF II ND Solar Filter Set — Safely Image the Sun with Your DWARF II","description":"\u003cp\u003eSafely image the Sun with your DWARF II smart telescope. The Explore Scientific DWARF II ND Solar Filter Set (ES-DII-SOLAR) includes two neutral-density solar filters purpose-built for the DWARF II — letting you capture white light solar images of sunspots, solar limb darkening, and surface texture safely and easily through the DWARF II app. Sunspots are at a solar maximum right now, making this a great time to start observing. Never point any telescope at the Sun without a proper solar filter. Ships free to the US.\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44554782769186,"sku":"ES-DII-SOLAR","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/NDtelescopefilter_2_1200x1200_jpg.jpg?v=1763644728"},{"product_id":"solar-filter-for-vespera-es-ac021","title":"Vaonis Solar Filter for Vespera Smart Telescope — Safely Observe the Sun with Your Smart Telescope | Telescope Wolves","description":"\u003cp\u003eSafely observe and image the Sun with your Vespera. The Vaonis Solar Filter (ES-AC021) clips directly onto the Vespera smart telescope and allows safe white light solar observation and imaging through the Singularity app — letting you capture sunspots and solar surface detail effortlessly. A simple, clip-on design means no guesswork and no risk. Solar activity is at a peak right now, making this an exciting time to start solar observing. Ships free to the US.\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":44554859315234,"sku":"ES-AC021","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/Filtre-solaire-Vespera-scene-1500x1500-1_f1548bf8-1276-478c-b418-a23ef43503b3.jpg?v=1763650853"},{"product_id":"daystar-quark-prominence-h-alpha-solar-filter-dsz4p","title":"DayStar Quark Prominence H-Alpha Solar Filter — Watch Solar Prominences and Flares Through Your Telescope","description":"\u003cp\u003eWatch solar prominences leap off the Sun's edge in real time. The DayStar Quark Prominence H-Alpha Solar Filter (DSZ4P) reveals the dramatic plasma arcs and loops erupting from the Sun's limb — the fiery structures most people have only seen in NASA photographs. The Prominence version is optimized for the solar limb and off-disk features, making it spectacular for visual observing at the telescope eyepiece. Works with any telescope as a 1.25-inch eyepiece accessory. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≥0.6Å — wider pass for brighter prominence views at the solar limb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e4.2× telecentric, optimized for 656nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/4 – f\/8 refractors only (not for SCTs, Maks, or Dobs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≤450mm refractor focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuark filter, 1.25\" and 2\" snouts with safety indents, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573507256354,"sku":"DSZ4G","price":2595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quark_Prominence_H-Alpha_Solar_Filter_See_Dramatic_Solar_Prominences_Filaments_with_Any_Telescope_DSZ4P.jpg?v=1774843136"},{"product_id":"daystar-quark-gemini-dual-mode-h-alpha-solar-filter-dsz4g","title":"DayStar Quark Gemini Dual-Mode H-Alpha Solar Filter — Two-in-One Solar Filter for Chromosphere and Prominence Observation","description":"\u003cp\u003eSwitch between chromosphere and prominence views with one filter. The DayStar Quark Gemini Dual-Mode H-Alpha Solar Filter (DSZ4G) gives you the best of both Quark worlds — a single etalon filter you can tune to favor either chromospheric surface detail or solar prominence viewing at the limb, without purchasing two separate Quarks. Ideal for solar observers who want flexibility in a single package. Works with any telescope as a 1.25-inch eyepiece accessory. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned, dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Modes\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromosphere (≤0.5Å) and Prominence (≥0.6Å) — single filter covers both bandpass regions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e4.2× telecentric, optimized for 656nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/4 – f\/8 refractors only (not for SCTs, Maks, or Dobs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≤450mm refractor focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eGemini Dual-Mode filter, 1.25\" and 2\" snouts with safety indents, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573516988450,"sku":"DSZ4G","price":2595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quark_Gemini_Dual-Mode_H-Alpha_Solar_Filter_Switch_Between_Prominence_Chromosphere_Viewing_with_Any_Telescope_DSZ4G.jpg?v=1774583452"},{"product_id":"daystar-quark-gemini-combo-h-alpha-solar-filter-beginners","title":"DayStar Quark Gemini Combo H-Alpha Solar Filter — Switch Between Chromosphere and Prominence Views of the Sun","description":"\u003cp\u003eThe most versatile entry into H-Alpha solar viewing. The DayStar Quark Gemini Combo (DSZGC) gives you the dual-mode Gemini filter alongside a matched set of accessories — everything needed to start viewing both the solar chromosphere and prominences with any telescope. A complete first step into dedicated H-Alpha solar astronomy. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned, dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Modes\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromosphere (≤0.5Å) and Prominence (≥0.6Å) — single filter covers both bandpass regions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e4.2× telecentric, optimized for 656nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/4 – f\/8 refractors only (not for SCTs, Maks, or Dobs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≤450mm refractor focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eGemini Dual-Mode filter, matching accessories, 1.25\" and 2\" snouts with safety indents, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573517348898,"sku":"DSZGC","price":2595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/daystar_quark_gemini_dsz4g_1_1.jpg?v=1774519203"},{"product_id":"daystar-quark-combo-chromosphere-h-alpha-solar-filter-beginners","title":"DayStar Combo Quark Chromosphere H-Alpha Solar Filter — Observe Fine Solar Surface Detail with Your Existing Telescope","description":"\u003cp\u003eThe complete chromosphere solar viewing package. The DayStar Combo Quark Chromosphere (DSZCC) pairs the Quark Chromosphere H-Alpha filter with a matched set of solar accessories — providing a ready-to-use system for observing solar flares, filaments, and active chromospheric detail with any telescope. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eObserving Mode\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromosphere — surface detail, filaments, active regions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eNone (0-power filter; telecentric barlows available separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e25mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/15 – f\/30 (SCTs, Maks, long refractors); SCTs require front-mount off-axis ERF (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRefractors up to ~1,800mm focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eCombo Quark filter, 1.25\" eyepiece snout with safety indent, 2° off-axis SCT\/Mak adapter, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573518430242,"sku":"DSZCC","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Combo_Quark_Chromosphere_H-Alpha_Solar_Filter_View_Solar_Surface_Detail_Chromospheric_Features_with_Any_Telescope_DSZCC.jpg?v=1774518392"},{"product_id":"daystar-combo-quark-prominence-h-alpha-solar-filter-dszcp","title":"DayStar Combo Quark Prominence H-Alpha Solar Filter — Watch Solar Prominences and Loops with Your Telescope","description":"\u003cp\u003eThe complete prominence solar viewing package. The DayStar Combo Quark Prominence (DSZCP) pairs the Quark Prominence H-Alpha filter with matching accessories — a ready-to-use system for dramatic solar prominence viewing at the limb of the Sun with any telescope. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eObserving Mode\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eProminence — solar limb features, plasma loops, erupting prominences\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eNone (0-power filter; telecentric barlows available separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e25mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/15 – f\/30 (SCTs, Maks, long refractors); SCTs require front-mount off-axis ERF (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRefractors up to ~1,800mm focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eCombo Quark filter, 1.25\" eyepiece snout with safety indent, 2° off-axis SCT\/Mak adapter, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573519380514,"sku":"DSZCP","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Combo_Quark_Prominence_H-Alpha_Solar_Filter_See_Solar_Prominences_Chromospheric_Detail_with_Any_Telescope_DSZCP.jpg?v=1774517998"},{"product_id":"daystar-dszsd-quark-sodium-d-line-solar-filter-photospheric-imaging-beginner-solar-observation","title":"DayStar Quark Sodium D-Line Solar Filter — Observe the Sun in Sodium D-Line Light for Unique Solar Detail","description":"\u003cp\u003eA specialty solar filter for photospheric imaging in sodium light. The DayStar Quark Sodium D-Line filter (DSZSD) isolates the sodium D-line wavelength — producing a unique solar view of photospheric features and granulation that differs from standard H-Alpha or white light views. A specialty addition for dedicated solar observers expanding beyond H-Alpha into multi-wavelength solar astronomy. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSodium D-line (589.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTarget Features\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePhotospheric sodium absorption; line-of-sight velocity Doppler shifts; granulation contrast in a wavelength rarely imaged by amateurs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e4.2× telecentric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/4 – f\/8 refractors only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≤450mm refractor focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuark Sodium D-Line filter, 1.25\" and 2\" snouts with safety indents, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573519708194,"sku":"DSZSD","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_QUARK_Eyepiece_Solar_Filter_Sodium_D_Line_Lower_Body_Side_Profile_600x600_efdb859f-3952-45d6-90b7-94918e46795e.jpg?v=1774496851"},{"product_id":"daystar-dszmg-quark-magnesium-i-b2-line-solar-filter-photospheric-imaging-beginner-solar-observation","title":"DayStar Quark Magnesium I Solar Filter — Observe Solar Atmospheric Detail in Magnesium I Spectral Line Light","description":"\u003cp\u003eObserve the solar photosphere in magnesium light. The DayStar Quark Magnesium I filter (DSZMG) isolates the magnesium absorption line for a unique photospheric solar view — offering a different perspective on solar surface structure than standard H-Alpha or white light filters. A specialty filter for advanced solar observers building a multi-wavelength solar imaging setup. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eMagnesium I b2-line (517nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTarget Features\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePhotospheric magnesium absorption; comparative multi-wavelength photospheric imaging alongside H-Alpha and Ca II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e4.2× telecentric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/4 – f\/8 refractors only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≤450mm refractor focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuark Magnesium I filter, 1.25\" and 2\" snouts with safety indents, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573519872034,"sku":"DSZMG","price":1495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_QUARK_Magnesium_I_b2-Line_Solar_Filter_Specialty_Solar_Telescope_Filter_for_Photospheric_Imaging_Beginner_Solar_Observation_DSZMG.jpg?v=1774487584"},{"product_id":"daystar-dszch-quark-calcium-h-line-solar-filter-chromospheric-imaging-beginner-solar-observation","title":"DayStar Quark Calcium H-Line Solar Filter — Observe Solar Active Regions and Plage in Calcium H-Line Light","description":"\u003cp\u003eSee the solar chromosphere in calcium H-line light. The DayStar Quark Calcium H-Line filter (DSZCH) reveals chromospheric features in the calcium H wavelength — showing solar plage, active regions, and surface structure with a different character than standard H-Alpha views. Calcium H-line imaging is widely used in professional solar observatories and is now accessible to serious amateur astronomers. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eCalcium II H-line (396.9nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTarget Features\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromospheric plage, magnetic network structure, active region mapping — the wavelength used in professional solar observatories worldwide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e4.2× telecentric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/4 – f\/8 refractors only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e≤450mm refractor focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuark Calcium H-Line filter, 1.25\" and 2\" snouts with safety indents, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573520265250,"sku":"DSZCH","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_QUARK_Calcium_H-Line_Solar_Filter_Advanced_Solar_Telescope_Filter_for_Chromospheric_Imaging_Beginner_Solar_Observation_DSZCH.png?v=1774434129"},{"product_id":"daystar-dszcc-combo-quark-chromosphere-h-alpha-solar-filter-kit-complete-solar-telescope-system-beginner-solar-imaging","title":"DayStar Combo Quark Chromosphere H-Alpha Solar Filter Kit — Complete Bundle for Observing Fine Solar Surface Detail","description":"\u003cp\u003eThe complete DayStar Quark Chromosphere system. The Combo QUARK Chromosphere Kit (DSZCC) bundles the Quark Chromosphere H-Alpha filter with a matched set of supporting accessories — providing a ready-to-use solar observation and imaging system for any telescope. Everything you need to start observing the solar chromosphere in H-Alpha without purchasing components separately. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSolid-state Fabry-Pérot etalon (electrically tuned)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eObserving Mode\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromosphere — surface detail, filaments, active regions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eIntegrated Barlow\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eNone (0-power filter; telecentric barlows available separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e25mm integrated, 21mm clear aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ef\/Ratio Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ef\/15 – f\/30 (SCTs, Maks, long refractors); SCTs require front-mount off-axis ERF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFull-Disk Focal Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRefractors up to ~1,800mm focal length for full solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e±0.5Å with 0.1Å detents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eUSB 5V, 1.5A (90–240VAC wall adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eCombo Quark Chromosphere filter, compatible Energy Rejection Filter (ERF), 1.25\" eyepiece snout with safety indent, 2° off-axis SCT\/Mak adapter, 90–240VAC wall adapter with international plug adapters, Twist-Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44573531471906,"sku":"DSZCCC","price":2495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Combo_QUARK_Chromosphere_H-Alpha_Solar_Filter_Kit_Complete_Solar_Telescope_System_for_Beginner_H-Alpha_Solar_Imaging_Viewing_DSZCC.webp?v=1774433417"},{"product_id":"daystar-quantum-h-alpha-se-solar-filter-qse-p","title":"DayStar Quantum H-Alpha SE Solar Filter 0.7–0.9Å — Prominence Mode for Watching Solar Loops and Flares","description":"\u003cp\u003eProfessional H-Alpha solar viewing in a self-contained filter. The DayStar Quantum H-Alpha SE (QSE-P) is a dedicated etalon filter that mounts at the front of your refractor telescope for high-contrast solar observation in hydrogen-alpha light. The 0.7–0.9Å passband is tuned for prominence viewing — revealing dramatic plasma loops and eruptions at the solar limb that Quark-class filters can't quite match. The Quantum line is DayStar's step up for serious solar observers who want the best optical performance available. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSE — meets DayStar quality criteria for visual and photographic use; suited for amateur and academic applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eObserving Mode\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eProminence — wider bandpass for brighter solar limb features, plasma loops, and eruptions; exact FWHM varies with telescope f\/ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; bandpass tightens at slower f\/ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum SE filter, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44576874659874,"sku":"QSE-P","price":5195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_SE_Solar_Filter_0.7_0.9_Hydrogen_Alpha_Filter_for_Viewing_Solar_Prominences_Chromospheric_Detail_QSE-P.jpg?v=1774239112"},{"product_id":"daystar-quantum-h-alpha-se-solar-filter-qse-c","title":"DayStar Quantum H-Alpha SE Solar Filter 0.3–0.5Å — Chromosphere Mode for Observing Fine Solar Surface Detail","description":"\u003cp\u003eUltra-narrow H-Alpha for the finest chromospheric solar detail. The DayStar Quantum H-Alpha SE (QSE-C) at 0.3–0.5Å is tuned for chromosphere viewing — delivering razor-sharp views of solar flares, filaments, spicules, and active chromospheric structure at the highest contrast available in its class. The Quantum SE line represents a significant step up from the Quark for observers who want to see everything the solar atmosphere has to offer. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSE — meets DayStar quality criteria for visual and photographic use; suited for amateur and academic applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eObserving Mode\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromosphere — narrower bandpass for maximum surface contrast; filaments, flares, and spicule structure; exact FWHM varies with telescope f\/ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; bandpass tightens at slower f\/ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum SE filter, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44576892551202,"sku":"QSE-C","price":8995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_SE_Solar_Filter_0.3_0.5_Narrow_Hydrogen_Alpha_Filter_for_Viewing_Solar_Prominences_Surface_Detail_QSE-C.jpg?v=1774238822"},{"product_id":"daystar-quantum-h-alpha-0-7a-pe-solar-filter-7qpe","title":"DayStar Quantum H-Alpha 0.7Å PE Solar Filter — Entry-Level H-Alpha Passband for Solar Viewing and Astrophotography","description":"\u003cp\u003ePremium etalon performance for dedicated solar observatories. The DayStar Quantum 0.7Å PE (Prominence Edition) solar filter delivers a 0.7 angstrom passband — narrow enough to reveal fine solar prominence structure, filaments, and chromospheric detail at a level that defines the Quantum PE line. Designed for advanced amateur and semi-professional solar observing. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePE (Professional\/research grade — certified substrate homogeneity and on-band transmittance; additional QC and fabrication steps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e0.7Å at f\/30 — prominences in high contrast with occasional surface texture visible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; bandpass tightens at slower f\/ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum PE 0.7Å filter, certification documentation, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577742520354,"sku":".7QPE","price":13990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_0.7_PE_Solar_Filter_Narrow_Hydrogen_Alpha_Filter_for_Viewing_Solar_Prominences_Surface_Detail_.7QPE.webp?v=1774238510"},{"product_id":"daystar-quantum-h-alpha-0-6a-pe-solar-filter-6qpe","title":"DayStar Quantum H-Alpha 0.6Å PE Solar Filter — Wide Passband H-Alpha Filter for Bright Solar Prominence Views","description":"\u003cp\u003eFor observers who've outgrown the 0.7Å and want to push chromospheric contrast further without sacrificing prominence structure. The DayStar Quantum 0.6Å PE occupies the narrow gap between prominence and deep chromosphere tuning — delivering notably tighter surface detail, active region contrast, and filament resolution than the 0.7Å version while still holding limb features well at f\/30. PE-grade certification means the etalon substrate has been tested for aperture homogeneity and on-band transmittance; the unit you receive is measured, documented, and guaranteed to meet published performance criteria. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePE — certified substrate homogeneity and on-band transmittance; individual unit documentation included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e0.6Å at f\/30 — tighter surface contrast and filament resolution vs. 0.7Å; prominent structures remain visible at limb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; bandpass narrows further at slower ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum PE 0.6Å filter, certification documentation, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577774370850,"sku":".6QPE","price":17990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_0.6_PE_Solar_Filter_Narrow_Hydrogen_Alpha_Filter_for_Viewing_Solar_Prominences_Surface_Detail_.6QPE.jpg?v=1774238180"},{"product_id":"daystar-quantum-h-alpha-0-5a-pe-solar-filter-5qpe","title":"DayStar Quantum H-Alpha 0.5Å PE Solar Filter — Versatile H-Alpha Passband for Solar Surface and Prominence Viewing","description":"\u003cp\u003eAt 0.5Å, chromospheric contrast sharpens markedly — fine filament structure, spicule boundaries at the limb, and subtle active region detail that washes out at wider bandpasses begin to resolve clearly. The DayStar Quantum 0.5Å PE is the narrowest H-Alpha etalon that still delivers practical brightness in average apertures without requiring a telescope purpose-built for solar work. PE-grade certification means every unit is individually tested for etalon homogeneity and on-band transmittance, with documentation provided. For observers ready to move past the 0.6Å and extract genuine chromospheric resolution. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePE — certified substrate homogeneity and on-band transmittance; individual unit documentation included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e0.5Å at f\/30 — deep chromospheric contrast; spicule and filament structure clearly resolved; prominence visibility reduced vs. wider bandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; bandpass narrows further at slower ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum PE 0.5Å filter, certification documentation, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577775681570,"sku":".5QPE","price":21990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_0.5_PE_Solar_Filter_Narrow_Hydrogen_Alpha_Filter_for_Viewing_Solar_Prominences_Surface_Detail_.5QPE.webp?v=1774237936"},{"product_id":"daystar-quantum-h-alpha-0-4a-pe-solar-filter-4qpe","title":"DayStar Quantum H-Alpha 0.4Å PE Solar Filter — Sharp Narrow-Band H-Alpha for Detailed Solar Surface Observation","description":"\u003cp\u003eA 0.4Å passband is where serious solar imaging starts to approach the performance range of professional observatories. Surface granulation contrast rises markedly at this bandwidth — spicule fine structure, penumbral filaments in sunspot umbrae, and the chromospheric fibril network all become clearly visible, and Doppler velocity mapping of plasma motion in active regions yields scientifically meaningful results. The DayStar Quantum 0.4Å PE is for imagers who are ready to push their seeing-limited resolution to the atmospheric ceiling. PE certification means your specific unit has been individually tested, measured, and documented. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePE — certified substrate homogeneity and on-band transmittance; individual unit documentation included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e0.4Å at f\/30 — exceptional chromospheric resolution; granulation contrast, penumbral filaments, and spicule columns clearly resolved; best used with dedicated solar telescopes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; bandpass narrows further at slower ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum PE 0.4Å filter, certification documentation, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577792000034,"sku":".4QPE","price":27990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_0.4_PE_Solar_Filter_Ultra-Narrow_Hydrogen_Alpha_Filter_for_Sharp_Solar_Prominences_Surface_Detail_.4QPE.webp?v=1774237564"},{"product_id":"daystar-quantum-h-alpha-0-3a-pe-solar-filter-3qpe","title":"DayStar Quantum H-Alpha 0.3Å PE Solar Filter — Ultra-Narrow Passband for Maximum Solar Surface and Prominence Contrast","description":"\u003cp\u003eThe Quantum 0.3Å PE represents the absolute limit of what is achievable with an air-spaced Fabry-Pérot etalon at the amateur level. At this bandwidth, mottles, individual spicule columns, micro-filament threads, and chromospheric shock waves become visible with the right seeing — contrast approaching what you would expect from a tilt-tuned or pressure-scanned system costing an order of magnitude more. This filter is for observers with a dedicated solar telescope, exceptional seeing conditions, and a serious imaging rig. PE certification means your specific unit has been individually tested, measured, and documented for etalon homogeneity and on-band transmittance. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eH-Alpha (656.3nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePE — certified substrate homogeneity and on-band transmittance; individual unit documentation included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e0.3Å at f\/30 — maximum chromospheric contrast available in this class; mottles, spicule columns, micro-filaments, and chromospheric shock structures visible in excellent seeing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eOptimal f\/Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eBest performance at f\/30; dedicated solar telescope strongly recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eRed\/blue wing shift buttons; Doppler velocity mapping capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eComputer Control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eSerial port for on-screen wavelength display and automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum PE 0.3Å filter, certification documentation, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577798357026,"sku":".3QPE","price":35990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_H-Alpha_0.3_PE_Solar_Filter_Ultra-Narrow_Hydrogen_Alpha_Filter_for_Sharp_Solar_Prominences_Surface_Detail_.3QPE.webp?v=1774188845"},{"product_id":"daystar-quantum-calcium-ii-h-5a-solar-filter-ch5auni","title":"DayStar Quantum Calcium II H-Line 5Å Solar Filter — Observe Solar Plage and Active Regions in Calcium H-Line Light","description":"\u003cp\u003eCalcium II H-line imaging at 396.8nm provides a fundamentally different view of solar chromospheric dynamics than H-Alpha. At this wavelength, calcium emission traces the magnetically active network and plage regions with exceptional sensitivity — revealing the magnetic skeleton of the photosphere in a way H-Alpha cannot. The 5Å bandpass resolves chromospheric emission while blocking the bright photospheric continuum, making it ideal for plage mapping, active region correlation studies, and multi-wavelength solar imaging programs. Ca II H is used by professional observatories worldwide and is now accessible to serious amateurs with a dedicated solar setup. Note: requires a telescope whose optics transmit well in the near-UV. ERF required. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eCH5AUNI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eCa II H-line (396.8nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e5Å — chromospheric emission resolved; photospheric continuum blocked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBest For\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003ePlage mapping, chromospheric network, active region studies, multi-wavelength programs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eElectronic wavelength control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eUV Transmission Note\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eTelescope optics must transmit in the near-UV (396.8nm); many achromats and cemented objectives have reduced throughput here\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum Ca II H-Line 5Å filter, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577806778402,"sku":"CH5AUNI","price":13990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_Calcium_II_H_5_Solar_Filter_Observe_Solar_Chromosphere_Surface_Detail_in_Calcium_H_Light_CH5AUNI.jpg?v=1774188510"},{"product_id":"daystar-quantum-calcium-ii-k-2a-solar-filter-ck2auni","title":"DayStar Quantum Calcium II K-Line 2Å Solar Filter — Reveal Solar Active Regions and Chromospheric Detail in Calcium Light","description":"\u003cp\u003eThe calcium K line at 393.4nm is one of the most scientifically productive solar wavelengths — used by professional observatories from Meudon to BBSO for chromospheric mapping and network studies since the 19th century. The DayStar Quantum 2Å Ca II K filter resolves chromospheric structures including the network, plage regions, and active region dynamics with outstanding clarity. At 2Å, this filter delivers meaningful contrast over the photospheric background while preserving chromospheric signal, making it suitable for high-resolution imaging programs. Note: requires telescope optics with good near-UV transmission. ERF required. Ships free to the US.\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:24px;font-size:14px;line-height:1.5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\" style=\"text-align:left;padding:10px 14px;background:#f7f7f7;border-bottom:2px solid #ddd;font-size:15px;font-weight:600;\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;width:44%;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eCK2AUNI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eCa II K-line (393.4nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eFabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e2Å — higher contrast than Ca II H 5Å; chromospheric network and plage structure clearly resolved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eBest For\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eChromospheric network, plage and active region detail, multi-wavelength solar programs, high-resolution Ca II imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eWavelength Display\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eLive LCD readout, accurate to 0.1Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eTuning\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eElectronic wavelength control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003e12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eUV Transmission Note\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eTelescope optics must transmit at 393.4nm; cemented objectives and many achromats attenuate near-UV significantly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;font-weight:600;color:#444;\"\u003eERF Required\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;border-bottom:1px solid #efefef;\"\u003eYes — front-mount Energy Rejection Filter required; sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 14px;font-weight:600;color:#444;\"\u003eWhat's in the Box\u003c\/td\u003e\n\u003ctd style=\"padding:8px 14px;\"\u003eQuantum Ca II K-Line 2Å filter, 100–240VAC power supply with international adapters (US, EU, UK, AU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44577825685538,"sku":"CK2AUNI","price":17990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_Quantum_Calcium_II_K_2_Solar_Filter_See_Fine_Solar_Surface_Detail_in_Calcium_K_Light_for_Advanced_Sun_Viewing_CK2AUNI.jpg?v=1774187413"},{"product_id":"daystar-80mm-erf-solar-filter-110mm-cap-e-110n80","title":"DayStar 80mm ERF Energy Rejection Filter with 110mm Cap — Essential Front-End Solar Filter for Quantum H-Alpha Observation","description":"\u003cp\u003eEssential front-end protection for your Quantum H-Alpha solar filter. The DayStar 80mm ERF Energy Rejection Filter (E-110N80) mounts at the front of your refractor telescope before the Quantum etalon — blocking the vast majority of solar energy before it enters the optical train, protecting the filter and your eyes while enabling safe H-Alpha solar observation. Fits telescopes with 80–89mm tube outer diameters. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44578289811490,"sku":"E-110N80","price":550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_80mm_ERF_Energy_Rejection_Filter_with_Cell_110mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-110N80.jpg?v=1774178766"},{"product_id":"daystar-80mm-erf-solar-filter-120mm-cap-e-120n80","title":"DayStar 80mm ERF Energy Rejection Filter with 120mm Cap — Essential Front-End Solar Filter for Quantum H-Alpha Observation","description":"\u003cp\u003eFront-end solar energy protection for Quantum H-Alpha setups on larger-capped telescopes. The DayStar 80mm ERF (E-120N80) blocks the majority of solar energy at the front of your refractor before it reaches the Quantum etalon — ensuring safe H-Alpha observation. The 120mm cap fits a wider range of telescope tube outer diameters. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44578291154978,"sku":"E-120N80","price":550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_80mm_ERF_Energy_Rejection_Filter_with_Cell_120mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-120N80.png?v=1774178466"},{"product_id":"daystar-100mm-erf-solar-filter-120mm-cap-e-120n100","title":"DayStar 100mm ERF Energy Rejection Filter with 120mm Cap — Safe Front-End Solar Filter for H-Alpha Refractor Observation","description":"\u003cp\u003e100mm aperture ERF for Quantum H-Alpha solar observation. The DayStar 100mm ERF (E-120N100) provides front-end energy rejection for 100mm aperture Quantum etalon setups — blocking the bulk of solar infrared and UV energy before it reaches the sensitive filter element. 120mm cap size. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44578293317666,"sku":"E-120N100","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_100mm_ERF_Energy_Rejection_Filter_with_Cell_120mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-120N100.jpg?v=1774178206"},{"product_id":"daystar-100mm-erf-solar-filter-130mm-cap-e-130n100","title":"DayStar 100mm ERF Energy Rejection Filter with 130mm Cap — Safe Front-End Solar Filter for H-Alpha Refractor Observation","description":"\u003cp\u003e100mm aperture ERF with a 130mm cap for Quantum H-Alpha setups. The DayStar 100mm ERF (E-130N100) provides front-end solar energy rejection for 100mm Quantum etalon configurations. The 130mm cap accommodates a wider range of telescope tube outer diameters. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44578327035938,"sku":"E-130N100","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_100mm_ERF_Energy_Rejection_Filter_with_Cell_130mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-130N100.jpg?v=1774177887"},{"product_id":"daystar-100mm-erf-solar-filter-140mm-cap-e-140n100","title":"DayStar 100mm ERF Energy Rejection Filter with 140mm Cap — Safe Front-End Solar Filter for H-Alpha Refractor Observation","description":"\u003cp\u003e100mm aperture ERF with 140mm cap for DayStar Quantum H-Alpha solar setups. Blocks solar infrared and UV energy at the front of your refractor before it reaches the Quantum etalon — essential for safe H-Alpha solar observation. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44578356494370,"sku":"E-140N100","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_100mm_ERF_Energy_Rejection_Filter_with_Cell_140mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-140N100.png?v=1774177436"},{"product_id":"daystar-100mm-erf-solar-filter-150mm-cap-e-150n100","title":"DayStar 100mm ERF Energy Rejection Filter with 150mm Cap — Safe Front-End Solar Filter for H-Alpha Refractor Observation","description":"\u003cp\u003e100mm aperture ERF with 150mm cap for DayStar Quantum H-Alpha solar setups. Front-end energy rejection protects the Quantum etalon and enables safe H-Alpha solar observation. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44578372157474,"sku":"E-150N100","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_100mm_ERF_Energy_Rejection_Filter_with_Cell_150mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-150N100.jpg?v=1774177145"},{"product_id":"daystar-130mm-erf-solar-filter-150mm-cap-e-150n130","title":"DayStar 130mm ERF Energy Rejection Filter with 150mm Cap — Safe Solar Filter for Large-Aperture H-Alpha Setups","description":"\u003cp\u003e130mm aperture ERF for larger-aperture Quantum H-Alpha setups. The DayStar 130mm ERF (E-150N130) provides front-end solar energy rejection for 130mm Quantum etalon configurations, protecting the filter and enabling safe high-resolution H-Alpha solar observation. 150mm cap. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44582096142370,"sku":"E-150N130","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_130mm_ERF_Energy_Rejection_Filter_with_Cell_150mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-150N130.jpg?v=1774176771"},{"product_id":"daystar-130mm-erf-solar-filter-170mm-cap-e-170n130","title":"DayStar 130mm ERF Energy Rejection Filter with 170mm Cap — Safe Solar Filter for Large-Aperture H-Alpha Setups","description":"\u003cp\u003e130mm aperture ERF with 170mm cap for Quantum H-Alpha solar setups. Front-end energy rejection for safe, high-contrast H-Alpha solar observation with 130mm aperture Quantum etalon configurations. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44582181634082,"sku":"E-170N130","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_130mm_ERF_Energy_Rejection_Filter_with_Cell_170mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-170N130.jpg?v=1774176522"},{"product_id":"daystar-130mm-erf-solar-filter-180mm-cap-e-180n130","title":"DayStar 130mm ERF Energy Rejection Filter with 180mm Cap — Safe Solar Filter for Large-Aperture H-Alpha Setups","description":"\u003cp\u003e130mm aperture ERF with 180mm cap for large-tube Quantum H-Alpha solar setups. Provides front-end solar energy rejection for 130mm configurations on larger-diameter refractor tubes. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44582222102562,"sku":"E-180N130","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_130mm_ERF_Energy_Rejection_Filter_with_Cell_180mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-180N130.jpg?v=1774175979"},{"product_id":"daystar-150mm-erf-solar-filter-180mm-cap-e-180n150","title":"DayStar 150mm ERF Energy Rejection Filter with 180mm Cap — Premium Solar Filter for High-Resolution H-Alpha Observation","description":"\u003cp\u003e150mm aperture ERF for high-resolution Quantum H-Alpha solar setups. The DayStar 150mm ERF (E-180N150) provides front-end energy rejection for 150mm aperture Quantum configurations — maximizing resolution while keeping the etalon safe. 180mm cap size. Ships free to the US.\u003c\/p\u003e","brand":"Daystar","offers":[{"title":"Default Title","offer_id":44582359957538,"sku":"E-180N150","price":1645.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/DayStar_150mm_ERF_Energy_Rejection_Filter_with_Cell_180mm_Cap_Safe_Solar_Viewing_Upgrade_for_Refractor_Telescopes_E-180N150.png?v=1774175663"},{"product_id":"daystar-130mm-erf-solar-filter-190mm-cap-e-190n130","title":"DayStar 130mm ERF Energy Rejection Filter with 190mm Cap — Safe Solar Filter for Large-Aperture H-Alpha Setups","description":"\u003cp\u003e130mm ERF with 190mm cap for extra-wide-tube refractor configurations. Provides front-end solar energy rejection for 130mm Quantum setups on telescopes with wider tube outer diameters requiring a larger cap. 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