{"product_id":"lunt-calcium-k-18mm-blocking-filter-2-in-straight-thru-2-tube-with-t2-2-connection","title":"Lunt Calcium K Modules","description":"\u003ch2 data-start=\"0\" data-end=\"25\" style=\"text-align: center;\"\u003eLunt Calcium K Modules\u003c\/h2\u003e\n\u003cul data-start=\"27\" data-end=\"1068\"\u003e\n\u003cli data-start=\"27\" data-end=\"200\"\u003e\n\u003cp data-start=\"29\" data-end=\"200\"\u003eExplore the Sun at \u003cstrong data-start=\"48\" data-end=\"72\"\u003e393.4 nm (Ca-K line)\u003c\/strong\u003e—a layer slightly \u003cstrong data-start=\"90\" data-end=\"123\"\u003elower and cooler than H-alpha\u003c\/strong\u003e—to reveal super-granulation, magnetic plages, and activity around sunspots\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"201\" data-end=\"378\"\u003e\n\u003cp data-start=\"203\" data-end=\"378\"\u003e\u003cstrong data-start=\"203\" data-end=\"228\"\u003eImaging-first design:\u003c\/strong\u003e internal narrowband filtering delivers a \u003cstrong data-start=\"270\" data-end=\"290\"\u003e\u0026lt; 2.4 Å bandpass\u003c\/strong\u003e, ideal for cameras that capture stunning Ca-K detail many eyes can’t resolve visually\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"379\" data-end=\"518\"\u003e\n\u003cp data-start=\"381\" data-end=\"518\"\u003e\u003cstrong data-start=\"381\" data-end=\"394\"\u003eWhy Ca-K?\u003c\/strong\u003e Complements H-alpha by adding depth and structure to active regions, helping you build a fuller picture of solar dynamics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"519\" data-end=\"683\"\u003e\n\u003cp data-start=\"521\" data-end=\"683\"\u003eWorks with \u003cstrong data-start=\"532\" data-end=\"570\"\u003emost standard nighttime refractors\u003c\/strong\u003e and with \u003cstrong data-start=\"580\" data-end=\"607\"\u003eLunt Modular Telescopes\u003c\/strong\u003e in their nighttime configuration—simple to integrate, powerful in results\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"684\" data-end=\"841\"\u003e\n\u003cp data-start=\"686\" data-end=\"841\"\u003e\u003cstrong data-start=\"686\" data-end=\"703\"\u003eVisual notes:\u003c\/strong\u003e Ca-K sits near the UV edge of vision; some observers (especially post-cataract surgery) see it well, but \u003cstrong data-start=\"809\" data-end=\"839\"\u003ecameras consistently excel\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"842\" data-end=\"976\"\u003e\n\u003cp data-start=\"844\" data-end=\"976\"\u003eChoose the right blocking filter size for your scope’s focal length to keep the full solar disk in-band and beautifully contrasted\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"977\" data-end=\"1068\"\u003e\n\u003cp data-start=\"979\" data-end=\"1068\"\u003eBuilt by Lunt Solar Systems—precision Ca-K performance backed by solar-specific expertise\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"1070\" data-end=\"1086\"\u003eSpecifications\u003c\/h1\u003e\n\u003cul data-start=\"1087\" data-end=\"1833\"\u003e\n\u003cli data-start=\"1087\" data-end=\"1138\"\u003e\n\u003cp data-start=\"1089\" data-end=\"1138\"\u003e\u003cstrong data-start=\"1089\" data-end=\"1111\"\u003eCenter Wavelength:\u003c\/strong\u003e \u003cstrong data-start=\"1112\" data-end=\"1124\"\u003e393.4 nm\u003c\/strong\u003e (Calcium K)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1139\" data-end=\"1204\"\u003e\n\u003cp data-start=\"1141\" data-end=\"1204\"\u003e\u003cstrong data-start=\"1141\" data-end=\"1154\"\u003eBandpass:\u003c\/strong\u003e \u003cstrong data-start=\"1155\" data-end=\"1166\"\u003e\u0026lt; 2.4 Å\u003c\/strong\u003e (internal narrowband filter system)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1205\" data-end=\"1276\"\u003e\n\u003cp data-start=\"1207\" data-end=\"1276\"\u003e\u003cstrong data-start=\"1207\" data-end=\"1223\"\u003ePrimary Use:\u003c\/strong\u003e \u003cstrong data-start=\"1224\" data-end=\"1235\"\u003eImaging\u003c\/strong\u003e (visual visibility varies by observer)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1277\" data-end=\"1375\"\u003e\n\u003cp data-start=\"1279\" data-end=\"1375\"\u003e\u003cstrong data-start=\"1279\" data-end=\"1297\"\u003eCompatibility:\u003c\/strong\u003e Most standard refractors; Lunt Modular Telescopes (nighttime configuration)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1376\" data-end=\"1453\"\u003e\n\u003cp data-start=\"1378\" data-end=\"1453\"\u003e\u003cstrong data-start=\"1378\" data-end=\"1403\"\u003eRecommended Aperture:\u003c\/strong\u003e Up to \u003cstrong data-start=\"1410\" data-end=\"1420\"\u003e100 mm\u003c\/strong\u003e (per blocking filter guidance)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1454\" data-end=\"1697\"\u003e\n\u003cp data-start=\"1456\" data-end=\"1486\"\u003e\u003cstrong data-start=\"1456\" data-end=\"1484\"\u003eBlocking Filter Options:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1489\" data-end=\"1697\"\u003e\n\u003cli data-start=\"1489\" data-end=\"1555\"\u003e\n\u003cp data-start=\"1491\" data-end=\"1555\"\u003e\u003cstrong data-start=\"1491\" data-end=\"1500\"\u003eB600:\u003c\/strong\u003e For up to \u003cstrong data-start=\"1511\" data-end=\"1521\"\u003e600 mm\u003c\/strong\u003e focal length (≤100 mm aperture)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1558\" data-end=\"1626\"\u003e\n\u003cp data-start=\"1560\" data-end=\"1626\"\u003e\u003cstrong data-start=\"1560\" data-end=\"1570\"\u003eB1200:\u003c\/strong\u003e For up to \u003cstrong data-start=\"1581\" data-end=\"1592\"\u003e1200 mm\u003c\/strong\u003e focal length (≤100 mm aperture)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1629\" data-end=\"1697\"\u003e\n\u003cp data-start=\"1631\" data-end=\"1697\"\u003e\u003cstrong data-start=\"1631\" data-end=\"1641\"\u003eB1800:\u003c\/strong\u003e For up to \u003cstrong data-start=\"1652\" data-end=\"1663\"\u003e1800 mm\u003c\/strong\u003e focal length (≤100 mm aperture)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1698\" data-end=\"1833\"\u003e\n\u003cp data-start=\"1700\" data-end=\"1833\"\u003e\u003cstrong data-start=\"1700\" data-end=\"1724\"\u003eUse Case Highlights:\u003c\/strong\u003e Active-region mapping, magnetic-field proxies (bright plages), super-granulation structure, sunspot environs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"1835\" data-end=\"1855\"\u003eWhat’s in the Box?\u003c\/h1\u003e\n\u003cul data-start=\"1856\" data-end=\"1930\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-start=\"1856\" data-end=\"1930\" data-is-last-node=\"\"\u003e\n\u003cp data-start=\"1858\" data-end=\"1930\" data-is-last-node=\"\"\u003e\u003cstrong data-start=\"1858\" data-end=\"1883\"\u003eLunt Calcium K Module\u003c\/strong\u003e in your chosen size (\u003cstrong data-start=\"1905\" data-end=\"1929\"\u003eB600 \/ B1200 \/ B1800\u003c\/strong\u003e)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"130mm Universal CaK Module","offer_id":50995014631744,"sku":"LS18CaKMDs-1","price":1799.0,"currency_code":"USD","in_stock":true},{"title":"B600 Filter in 2\" Star Diagonal","offer_id":50995014664512,"sku":"LS6CaKMDd","price":895.0,"currency_code":"USD","in_stock":true},{"title":"B1200 Filter in 2\" Star Diagonal","offer_id":50995014697280,"sku":"LS12CaKMDd","price":1495.0,"currency_code":"USD","in_stock":true},{"title":"B1800 Filter in 2\" Star Diagonal","offer_id":50995014730048,"sku":"LS18CaKMDd","price":1695.0,"currency_code":"USD","in_stock":true},{"title":"B600 Filter in 2\" Straight-Through Tube","offer_id":50995014762816,"sku":"LS6CaKMDs","price":895.0,"currency_code":"USD","in_stock":true},{"title":"B1200 Filter in 2\" Straight-Through Tube","offer_id":50995014795584,"sku":"LS12CaKMDs","price":1495.0,"currency_code":"USD","in_stock":true},{"title":"B1800 Filter in 2\" Straight-Through Tube","offer_id":50995014828352,"sku":"LS18CaKMDs","price":1695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/9904\/6464\/files\/CAKDiagonal_900X-mitchell.jpg?v=1756150688","url":"https:\/\/astroworldtelescopes.com\/products\/lunt-calcium-k-18mm-blocking-filter-2-in-straight-thru-2-tube-with-t2-2-connection","provider":"Astroworld Telescopes","version":"1.0","type":"link"}