{"product_id":"lunt-60mm-full-aperture-h-alpha-etalon-filter-set","title":"Lunt 60mm Full Aperture H-Alpha Etalon Filter Set","description":"\u003cdiv class=\"kt-page\"\u003e\n\n\u003cstyle\u003e\n.kt-page{--kt-primary:#030B1C;--kt-accent:#2E7FBF;max-width:1100px;margin:0 auto;font-family:inherit;}\n.kt-page.kt-page--wide{max-width:1600px;}\n.kt-page .kt-hero{display:flex;align-items:center;gap:40px;margin-bottom:40px;}\n.kt-page .kt-hero-copy{flex:1 1 55%;}\n.kt-page .kt-hero-img{flex:1 1 40%;text-align:center;}\n.kt-page .kt-sq{width:100%;max-width:420px;aspect-ratio:1\/1;margin:0 auto;background:#ffffff;border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden;}\n.kt-page .kt-sq img{max-width:92%;max-height:92%;width:auto;height:auto;object-fit:contain;}\n.kt-page .kt-hero-copy h2{font-size:26px;margin-bottom:14px;}\n.kt-page .kt-hero-copy p{font-size:16px;line-height:1.6;margin-bottom:14px;}\n.kt-page .kt-features{display:flex;align-items:flex-start;gap:40px;margin:40px 0;}\n.kt-page .kt-features-copy{flex:1 1 55%;}\n.kt-page .kt-features-img{flex:1 1 40%;text-align:center;}\n.kt-page .kt-section-heading{font-size:21px;display:inline-block;padding-bottom:8px;border-bottom:2px solid var(--kt-accent);margin-bottom:18px;}\n.kt-page .kt-feature-list{list-style:none;margin:0;padding:0;}\n.kt-page .kt-feature-list li{font-size:16px;line-height:1.5;margin-bottom:12px;padding-left:26px;position:relative;}\n.kt-page .kt-feature-list li:before{content:\"\\2713\";color:var(--kt-accent);font-weight:bold;position:absolute;left:0;}\n.kt-page .kt-feature-list b{color:#222;}\n.kt-page .kt-specs-wrap{box-sizing:border-box;}\n.kt-page .kt-specs{display:table !important;width:100% !important;border-collapse:collapse;margin:40px 0;font-size:15px;}\n.kt-page .kt-specs th,.kt-page .kt-specs td{border:2px solid #000;padding:10px 12px;text-align:left;}\n.kt-page .kt-specs th{background:var(--kt-primary) !important;color:#fff !important;font-size:16px;}\n.kt-page .kt-specs tr:nth-child(even){background:#f2f2f2;}\n.kt-page .kt-specs tr:nth-child(odd){background:#ffffff;}\n.kt-page .kt-cta{text-align:center;margin:40px 0;font-size:18px;font-weight:bold;}\n.kt-page .kt-cta-buttons{display:flex;justify-content:center;gap:16px;margin-top:16px;flex-wrap:wrap;}\n.kt-page .kt-cta-buttons a{display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;font-size:15px;transition:all .15s ease;}\n.kt-page .kt-cta-buttons a:hover{background:var(--kt-primary);color:#fff;}\n.kt-page .kt-manuals a{display:block;color:var(--kt-primary);font-weight:bold;font-size:30px;text-align:left;text-decoration:none;margin-bottom:10px;}\n.kt-page .kt-manuals a:hover{color:var(--kt-accent);}\n@media (max-width:768px){\n  .kt-page .kt-hero,.kt-page .kt-features{flex-direction:column;}\n  .kt-page .kt-hero-img img,.kt-page .kt-features-img img{max-width:400px;}\n  .kt-page .kt-hero-copy p,.kt-page .kt-features-copy p{font-size:17px;}\n  .kt-page .kt-cta-buttons{display:grid;grid-template-columns:1fr 1fr;gap:12px;}\n  .kt-page .kt-cta-buttons a:nth-child(3){grid-column:1 \/ span 2;}\n  .kt-page .kt-manuals a{font-size:24px;}\n}\n\u003c\/style\u003e\n\n\u003cdiv class=\"kt-hero\"\u003e\n  \u003cdiv class=\"kt-hero-copy\"\u003e\n    \u003ch2\u003eSixty Millimetres Of Unobstructed Hydrogen Alpha\u003c\/h2\u003e\n        \u003cp\u003eThis 60mm full aperture H-alpha etalon package from Lunt places a 60mm tilt tuned etalon in front of your refractor with no central obstruction. Each etalon is individually tested on Lunt metrology equipment and carries a verified 0.4 Angstrom bandpass, so the figure on your unit is measured rather than assumed.\u003c\/p\u003e\n    \u003cp\u003eThe extra aperture over the 50mm set raises resolution and image brightness, which helps when you push magnification on filament structure or want a cleaner full disc frame. Tilt tuning shifts the passband across the hydrogen alpha line at 656.28 nm, and the filter lifts straight off so the refractor returns to night sky duty.\u003c\/p\u003e\n    \u003cp\u003eA Lunt blocking filter must sit in the optical path at all times. Order the set with a B600 for focal lengths to 540 mm, a B1200 to 1080 mm, a B1800 to 1620 mm or a B3400 for the longest focal lengths, and pick the 2 inch or 1.25 inch fitting to match your focuser.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kt-hero-img\"\u003e\n    \u003cdiv class=\"kt-sq\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/8273\/7521\/files\/Double-Stack-Filter-60F-Lunt-Solar-Telescope.jpg?v=1743112794\" alt=\"Lunt LS60FHa 60mm front mount full aperture hydrogen alpha etalon filter\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"kt-features\"\u003e\n  \u003cdiv class=\"kt-features-copy\"\u003e\n    \u003ch3 class=\"kt-section-heading\"\u003eKey Features\u003c\/h3\u003e\n    \u003cul class=\"kt-feature-list\"\u003e\n      \u003cli\u003e\n\u003cb\u003eVerified Bandpass\u003c\/b\u003e - 0.4 Angstrom, individually measured on Lunt metrology equipment for every unit\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eFull 60mm Aperture\u003c\/b\u003e - no central support foot, so the whole objective area stays clear\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eTilt Tuned\u003c\/b\u003e - angle the housing to place the passband on the 656.28 nm line\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eDouble Stack Capable\u003c\/b\u003e - in series with a second etalon the combined bandpass drops below 0.28 Angstrom\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eBlocking Filter Options\u003c\/b\u003e - B600, B1200, B1800 and B3400 to match focal length and sensor size\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eHard Case\u003c\/b\u003e - stored in an aluminium case with fitted foam\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kt-features-img\"\u003e\n    \u003cdiv class=\"kt-sq\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/8273\/7521\/files\/Double-Stack-Filter-60F-Lunt-Solar-Telescope-2.jpg?v=1743112794\" alt=\"Alternate view of the Lunt LS60FHa 60mm front mount etalon filter housing and tilt tuning ring\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"kt-specs-wrap\"\u003e\n\u003ctable class=\"kt-specs\"\u003e\n  \u003ctr\u003e\u003cth colspan=\"2\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFront mounted full aperture hydrogen alpha etalon filter set\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eEtalon Aperture\u003c\/td\u003e\n\u003ctd\u003e60 mm, no central obstruction\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003eHydrogen alpha, 656.28 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSingle Etalon Bandpass\u003c\/td\u003e\n\u003ctd\u003e0.4 Angstrom, individually verified\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDouble Stack Bandpass\u003c\/td\u003e\n\u003ctd\u003eLess than 0.28 Angstrom with a second etalon in series\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eTilt tuned\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB600 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e6 mm clear aperture, up to 540 mm focal length, 1.25 inch or 2 inch diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB1200 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e12 mm clear aperture, up to 1080 mm focal length, 1.25 inch or 2 inch diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB1800 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e18 mm clear aperture, up to 1620 mm focal length, 1.25 inch or 2 inch diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB3400 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e34 mm clear aperture, up to 3060 mm focal length, 2 inch straight through tube\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFocuser Fitting\u003c\/td\u003e\n\u003ctd\u003eCodes ending in 2 supply a 2 inch blocking filter, codes ending in 1 supply 1.25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBlocking Filter Required\u003c\/td\u003e\n\u003ctd\u003eYes, a Lunt blocking filter must remain in the optical path at all times\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eAluminium hard case with fitted foam\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFilter Weight\u003c\/td\u003e\n\u003ctd\u003eLunt lists approximately 3 lb for the etalon assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eStorefront Listing\u003c\/td\u003e\n\u003ctd\u003ePublished as Lunt LS60FHa Front Mount 60 mm Double Stack Filter, etalon only, blocking filter sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eLS60FHa2\/B600, LS60FHa1\/B600, LS60FHa2\/B1200, LS60FHa1\/B1200, LS60FHa2\/B1800, LS60FHa1\/B1800, LS60FHa\/B3400\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e11 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years from date of purchase, original purchaser, manufacturing and workmanship defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\n\n\u003cp class=\"kt-cta\"\u003e\n  Talk to a Specialist\n  \u003cspan class=\"kt-cta-buttons\"\u003e\n    \u003ca href=\"\/pages\/contact\" style=\"display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;\"\u003eContact Us\u003c\/a\u003e\n    \u003ca href=\"mailto:sales@telescopedepot.com\" style=\"display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;\"\u003eEmail a Specialist\u003c\/a\u003e\n    \u003ca href=\"\/pages\/shipping\" style=\"display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;\"\u003eShipping Info\u003c\/a\u003e\n  \u003c\/span\u003e\n\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Lunt Solar Systems","offers":[{"title":"B600 \/ 2\" Focuser","offer_id":53917583343727,"sku":"LS60FHa2\/B600","price":2195.99,"currency_code":"USD","in_stock":true},{"title":"B600 \/ 1.25\" Focuser","offer_id":53917583376495,"sku":"LS60FHa1\/B600","price":2195.99,"currency_code":"USD","in_stock":true},{"title":"B1200 \/ 2\" Focuser","offer_id":53917583409263,"sku":"LS60FHa2\/B1200","price":2295.99,"currency_code":"USD","in_stock":true},{"title":"B1200 \/ 1.25\" Focuser","offer_id":53917583442031,"sku":"LS60FHa1\/B1200","price":2295.99,"currency_code":"USD","in_stock":true},{"title":"B1800 \/ 2\" Focuser","offer_id":53917583474799,"sku":"LS60FHa2\/B1800","price":2595.99,"currency_code":"USD","in_stock":true},{"title":"B1800 \/ 1.25\" Focuser","offer_id":53917583507567,"sku":"LS60FHa1\/B1800","price":2595.99,"currency_code":"USD","in_stock":true},{"title":"B3400 \/ 2\" Focuser","offer_id":53917583540335,"sku":"LS60FHa\/B3400","price":4395.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/7968\/0367\/files\/Double-Stack-Filter-60F-Lunt-Solar-Telescope_cf061cf5-9959-40a7-aa24-70f8fa9e6750.jpg?v=1785527516","url":"https:\/\/telescopedepot.com\/products\/lunt-60mm-full-aperture-h-alpha-etalon-filter-set","provider":"Telescope Depot","version":"1.0","type":"link"}