{"product_id":"lunt-100mm-full-aperture-h-alpha-etalon-filter-set","title":"Lunt 100mm 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\u003eOne Hundred Millimetre Solar Etalon Filter Set\u003c\/h2\u003e\n        \u003cp\u003eThis 100mm full aperture H-alpha etalon package from Lunt is the largest front mounted etalon in the Lunt filter range. The etalon threads onto the front of a customer supplied refractor through a Lunt adapter plate, and the supplied adapters cover refractors up to 102 mm; anything larger needs a custom plate.\u003c\/p\u003e\n    \u003cp\u003eLike the smaller full aperture sets, the etalon covers the whole objective with no central support foot, and each set is ordered with a blocking filter chosen for your focal length and focuser size. The trailing 2 or 1 in each code tells you whether the blocking filter arrives in a 2 inch or a 1.25 inch fitting.\u003c\/p\u003e\n    \u003cp\u003eLunt's own manual quotes under 0.75 Angstrom single stack and about 0.55 Angstrom when a second etalon is added, while dealer spec sheets quote under 0.7 and under 0.5. Both figures are shown below so you can see the spread. Note that the etalon on its own, without a blocking filter, is sold separately on our double stack etalon page.\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\/DS2-80-Double-Stack-Filter-Lunt-Solar-Telescope.jpg?v=1743113214\" alt=\"Lunt double stack etalon filter module for the 80 mm and 100 mm universal telescopes\"\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\u003eFull Aperture\u003c\/b\u003e - the etalon covers the whole objective with no central obstruction, as on the 50mm and 60mm sets\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eBlocking Filter Choice\u003c\/b\u003e - ordered with a B600, B1200, B1800 or B3400 blocking filter\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eFocuser Fit\u003c\/b\u003e - codes ending in 2 supply a 2 inch blocking filter, codes ending in 1 supply 1.25 inch\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eBandpass\u003c\/b\u003e - under 0.75 Angstrom single stack per Lunt's manual, about 0.55 Angstrom double stacked\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eBlocking Filter Required\u003c\/b\u003e - a Lunt blocking filter must stay in the optical path at all times for safe viewing\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eAdapter Plate Required\u003c\/b\u003e - mounts to a customer supplied refractor through a Lunt adapter plate, sold separately\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\/DS2-80-Double-Stack-Filter-Lunt-Solar-Telescope-1.jpg?v=1743113214\" alt=\"Alternate view of the Lunt 80 mm and 100 mm class double stack etalon module\"\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\u003e100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTelescope Fit\u003c\/td\u003e\n\u003ctd\u003eAny customer supplied refractor via a Lunt adapter plate; adapters cover refractors up to 102 mm, larger apertures need a custom plate\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFront Thread\u003c\/td\u003e\n\u003ctd\u003eM120 x 1.5 female on the filter body, per Teleskop Express and Bresser\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCentral Obstruction\u003c\/td\u003e\n\u003ctd\u003eNone, in line with the other full aperture sets\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\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003eUnder 0.75 Angstrom single stack per Lunt's own LS100FHa manual; dealer spec sheets publish under 0.7 Angstrom. About 0.55 Angstrom when a second etalon is added\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eTilt tuned, front mounted integrally tuned etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB600 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e6 mm clear aperture, visual to 600 mm and imaging to 400 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB1200 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e12 mm clear aperture, visual to 1200 mm and imaging to 600 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB1800 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e18 mm clear aperture, visual to 1800 mm and imaging to 1200 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eB3400 Blocking Filter\u003c\/td\u003e\n\u003ctd\u003e34 mm clear aperture, visual to 3400 mm and imaging to 1800 mm focal length\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\u003eAluminum finished hard case with fitted foam\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eStorefront Listing\u003c\/td\u003e\n\u003ctd\u003eListed on Lunt's DoubleStack H-Alpha Filters collection at 4,495 USD for the etalon alone, but the tile links to a product page that currently returns a 404 on Lunt's own site\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eLS100FHa2\/B600, LS100FHa1\/B600, LS100FHa2\/B1200, LS100FHa1\/B1200, LS100FHa2\/B1800, LS100FHa1\/B1800, LS100FHa2\/B3400\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e8 lb per the telescopes.net and Astronomy Plus spec tables\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\u003cdiv class=\"kt-manuals\"\u003e\n\u003ch6\u003eManuals\u003c\/h6\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/8273\/7521\/files\/LS100FHa_Manual.pdf?v=1748274315\" style=\"display:block;color:var(--kt-primary);font-weight:bold;font-size:30px;text-align:left;text-decoration:none;margin-bottom:10px;\" target=\"_blank\" rel=\"noopener\"\u003eProduct Manual (PDF)\u003c\/a\u003e\n\u003c\/div\u003e\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":53917599793263,"sku":"LS100FHa2\/B600","price":4895.99,"currency_code":"USD","in_stock":true},{"title":"B600 \/ 1.25\" Focuser","offer_id":53917599826031,"sku":"LS100FHa1\/B600","price":4895.99,"currency_code":"USD","in_stock":true},{"title":"B1200 \/ 2\" Focuser","offer_id":53917599858799,"sku":"LS100FHa2\/B1200","price":4995.99,"currency_code":"USD","in_stock":true},{"title":"B1200 \/ 1.25\" Focuser","offer_id":53917599891567,"sku":"LS100FHa1\/B1200","price":4995.99,"currency_code":"USD","in_stock":true},{"title":"B1800 \/ 2\" Focuser","offer_id":53917599924335,"sku":"LS100FHa2\/B1800","price":5295.99,"currency_code":"USD","in_stock":true},{"title":"B1800 \/ 1.25\" Focuser","offer_id":53917599957103,"sku":"LS100FHa1\/B1800","price":5295.99,"currency_code":"USD","in_stock":true},{"title":"B3400 \/ 2\" Focuser","offer_id":53917599989871,"sku":"LS100FHa2\/B3400","price":6995.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/7968\/0367\/files\/DS2-80-Double-Stack-Filter-Lunt-Solar-Telescope_ecbf3db1-7aeb-4373-8927-fc3e746289e4.jpg?v=1785527527","url":"https:\/\/telescopedepot.com\/products\/lunt-100mm-full-aperture-h-alpha-etalon-filter-set","provider":"Telescope Depot","version":"1.0","type":"link"}