{"title":"Double Stack Filters","description":"","products":[{"product_id":"lunt-internal-double-stack-module-for-ls130tha-dsii-ls130tha","title":"Lunt Double Stack Filter for LS130MT \u0026 LS152THa Telescopes","description":"\u003ch2\u003eLunt Double Stack Filter for LS130MT \u0026amp; LS152THa Telescopes\u003c\/h2\u003e\n\u003cp\u003eDouble stacking provides a truly enhanced, high definition view of the Sun’s surface details. It lowers the bandpass of the system from \u0026lt;0.35 Angstroms to \u0026lt;0.22 Angstroms. This will significantly make the surface features on the Sun “pop”! The Lunt 130 mm and 152 mm can be internally double-stacked at the time of purchase or anytime thereafter and does not need to be returned to the factory for double-stacking.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eSubsequently, add the DSII internal double stack module to make it a double stack unit later. This will make it more affordable to purchase our best solar telescope and still have room for upgrades. Once you upgrade your Lunt LS130MT with the LFPT internal double stack module, you will be able to see the finer details on the Sun that were not previously visible.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd an internal double-stacking module to a Lunt 130 mm or Lunt 152mmtelescope for a lowered bandpass of \u0026lt;0.35 Angstroms!\u003c\/li\u003e\n\u003cli\u003eThe LFPT includes a pressure tuner for true Doppler tuning.\u003c\/li\u003e\n\u003cli\u003eAdd it yourself to your own Lunt 130 mm or Lunt 152m mm Telescope, no trip back to the factory required!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eLunt Double Stack Filter for LS130MT \u0026amp; LS152THa Telescopes\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLunt 5-Year Warranty\u003c\/p\u003e","brand":"Lunt","offers":[{"title":"Double Stack for LS130MT","offer_id":44179557056741,"sku":"LS-DSII\/LFPT\/LS130MT","price":4193.0,"currency_code":"CAD","in_stock":true},{"title":"Double Stack for LS152THa","offer_id":44179557089509,"sku":"LS-DSII\/LFPT\/LS152THa","price":4193.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Lunt-Double-Stack-Filter-LS130MT-LS152THa-Telescopes.webp?v=1777045472"},{"product_id":"lunt-internal-double-stack-module-for-ls80tha-ls80ha-pt-dsii","title":"Lunt Double Stack Filter for Lunt 80mm \u0026 100mm Universal Telescopes (DSII\/SFPTP)","description":"\u003ch2\u003eLunt Internal Double Stack Module for LS80THa\u003c\/h2\u003e\n\u003cp id=\"sfpt-internal-double-stack-module-for-lunt-80-mm-100-mm-universal-day-and-night-telescopes\"\u003e\u003cstrong\u003eSFPT – Internal Double Stack Module for Lunt 80 mm \u0026amp; 100 mm Universal Day and Night Telescopes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eNow with \u003cspan\u003eNEW\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eIMPROVED\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eetalons!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eOur latest double-stack etalons deliver up to a 40% improvement in performance, achieving ultra-narrow bandwidths down to ~0.27Å for sharper, more detailed views. Every unit is individually measured at 656.28nm using our precision scanning monochromator—so every specification is verified, not estimated.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDouble stacking provides a truly enhanced, high definition view of the Sun’s surface details. Notably, it lowers the bandpass of the system from ~0.4Å Angstrom to\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e~0.27Å \u003c\/span\u003e Angstrom, which really makes the surface “pop”!\u003c\/p\u003e\n\u003cp\u003eThe Lunt 80 mm and 100mm Universal Telescopes can be internally double-stacked at the time of purchase or anytime thereafter. Furthermore, neither telescope module will need to be returned to the factory for double-stacking.\u003c\/p\u003e\n\u003cp\u003eYou can purchase the 80 mm or 100 mm single stack universal telescope initially and add the SFPT to make it a double stack unit later. This will make it more affordable to purchase our a new universal telescope and still have room for upgrades. Once you upgrade your Lunt Universal Telescope with the double stack unit, you will be able to see the finer details not previously visible.\u003c\/p\u003e\n\u003cp\u003eFind the latest news and photos of the Sun at\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.nasa.gov\/sun\"\u003eN\u003c\/a\u003e\u003ca href=\"https:\/\/www.nasa.gov\/sun\" rel=\"noopener\" target=\"_blank\"\u003eA\u003c\/a\u003e\u003ca href=\"https:\/\/www.nasa.gov\/sun\"\u003eSA\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLunt Internal Double Stack Module \u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eLunt 5-Year Warranty\u003c\/p\u003e","brand":"Lunt","offers":[{"title":"Default Title","offer_id":43125732901093,"sku":"LS-DSII\/SFPTP","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/lunt-internal-double-stack-module-for-ls80tha-ls80haptdsii-astronomy-plus.webp?v=1690484342"},{"product_id":"lunt-ls40fha-front-filter-new-gen","title":"Lunt LS40FHa Front Mounted 40mm Double Stack Filter (LS40FHaP) - New Gen Etalon","description":"\u003ch1\u003eLunt 40mm Front Mounted Double Stack Filter - New Gen Etalon\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eIt’s finally available! The Lunt Solar 40mm Double Stack Hydrogen-alpha Filter.\u003c\/li\u003e\n\u003cli\u003eLS40FHa solar filter front-mounted non-obstructed hydrogen-alpha filter for use with the Lunt Solar Systems 40mm Dedicated Hydrogen Alpha Telescope\u003c\/li\u003e\n\u003cli\u003eAttaches Directly to the Objective of the Lunt 40mm Dedicated Ha Telescope\u003c\/li\u003e\n\u003cli\u003eLowers the Bandpass of your existing LS40mm telescope to ~\u0026lt;0.22A !\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDSII Requirements: Adapter is included with Double Stack Unit\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eLS40FHa Double Stack Solar Filter\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Lunt LS40FHa Solar Filter is a 40 mm aperture (no central obstruction) integrally tuned etalon for use on Lunt Dedicated 40 mm Telescopes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Lunt LS40FHa Double Stack Unit is intended for use with the Lunt 40mm Dedicated Hydrogen Alpha System and requires a Lunt Solar Systems Blocking Filter  (this is a safety requirement). \u003c\/p\u003e\n\u003cp\u003eBecause the LS40FHa Solar Filter has an estimated bandpass of \u0026lt;0.4 Angstrom it is capable of providing high contrast views of both surface and edge detail. Significantly, adding an additional etalon system (double-stacking) will reduce the bandpass to ~\u0026lt;0.22. Allowing for higher resolution viewing and\/or imaging. \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Aperture: 40 mm\u003c\/li\u003e\n\u003cli\u003eEtalon:  \u0026lt;0.22 Angstrom as Double-Stack\u003c\/li\u003e\n\u003cli\u003eTuning: Tilt\u003c\/li\u003e\n\u003cli\u003eFocal Length: 400mm (Unchanged)\u003c\/li\u003e\n\u003cli\u003eFilter Storage: Aluminum finished hard case with fitted foam\u003c\/li\u003e\n\u003cli\u003eFilter Weight: ~1 lb (~.4kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eDouble Stack Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eLunt 5-Year Warranty\u003c\/p\u003e","brand":"Lunt","offers":[{"title":"Default Title","offer_id":43920763420901,"sku":"LS-LS40FHaP","price":973.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/lunt-ls40fha-front-mounted-40mm-double-stack-filter-ls40fha-astronomy-plus-1.webp?v=1690488969"},{"product_id":"lunt-ls40fha-double-stack-filter","title":"Lunt LS40FHa Solar Filter (LS40FHa) – Previous Generation Sale","description":"\u003ch1\u003eLunt 40mm Front Mounted Double Stack Filter - Previous Generation Sale\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eIt’s finally available! The Lunt Solar 40mm Double Stack Hydrogen-alpha Filter.\u003c\/li\u003e\n\u003cli\u003eLS40FHa solar filter front-mounted non-obstructed hydrogen-alpha filter for use with the Lunt Solar Systems 40mm Dedicated Hydrogen Alpha Telescope\u003c\/li\u003e\n\u003cli\u003eAttaches Directly to the Objective of the Lunt 40mm Dedicated Ha Telescope\u003c\/li\u003e\n\u003cli\u003eLowers the Bandpass of your existing LS40mm telescope to ~\u0026lt;0.5A !\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDSII Requirements: Adapter is included with Double Stack Unit\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003e\u003cstrong\u003eLS40FHa Double Stack Solar Filter\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS40FHa Solar Filter is a 40 mm aperture (no central obstruction) integrally tuned etalon for use on Lunt Dedicated 40 mm Telescopes\u003c\/p\u003e\n\u003cp\u003eThe Lunt LS40FHa Double Stack Unit is intended for use with the Lunt 40mm Dedicated Hydrogen Alpha System and requires a Lunt Solar Systems Blocking Filter  (this is a safety requirement). \u003c\/p\u003e\n\u003cp\u003eBecause the LS40FHa Solar Filter has an estimated bandpass of \u0026lt;0.70 Angstrom it is capable of providing high contrast views of both surface and edge detail. Significantly, adding an additional etalon system (double-stacking) will reduce the bandpass to ~\u0026lt;0.50. Allowing for higher resolution viewing and\/or imaging. \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Aperture: 40 mm\u003c\/li\u003e\n\u003cli\u003eEtalon:  \u0026lt;0.50 Angstrom as Double-Stack\u003c\/li\u003e\n\u003cli\u003eTuning: Tilt\u003c\/li\u003e\n\u003cli\u003eFocal Length: 400mm (Unchanged)\u003c\/li\u003e\n\u003cli\u003eFilter Storage: Aluminum finished hard case with fitted foam\u003c\/li\u003e\n\u003cli\u003eFilter Weight: ~1 lb (~.4kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eDouble Stack Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eLunt 5-Year Warranty\u003c\/p\u003e","brand":"Lunt","offers":[{"title":"Default Title","offer_id":48778779328741,"sku":"LS-LS40FHa","price":850.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/lunt-ls40fha-front-mounted-40mm-double-stack-filter-ls40fha-astronomy-plus-1.webp?v=1690488969"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/double-stack-filters-astronomy-plus_76608500-084e-4567-987d-9715be37fa46.png?v=1715807884","url":"https:\/\/istronomyplus.com\/collections\/double-stack-filter.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}