{"product_id":"tele-vue-delite-4mm-62-eyepiece","title":"Tele Vue DeLite 4mm 62° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n  \u003cli\u003e4mm Focal Length\u003c\/li\u003e\n  \u003cli\u003e62° Apparent Field of View\u003c\/li\u003e\n  \u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n  \u003cli\u003e20mm Eye Relief\u003c\/li\u003e\n  \u003cli\u003e4.3mm Field Stop\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n  \u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n  \u003cli\u003eFAQ\u003c\/li\u003e\n  \u003cli\u003eSpecifications\u003c\/li\u003e\n  \u003cli\u003eIn the Box\u003c\/li\u003e\n  \u003cli\u003eDownloads\u003c\/li\u003e\n  \u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eTele Vue DeLite 4mm 62° Eyepiece - 1.25\"\u003c\/h2\u003e\n      \u003cp\u003eThe Tele Vue DeLite 4mm 62° Eyepiece is a high-magnification optic designed to deliver the high-contrast performance of the Delos series in a more compact, lightweight 1.25-inch format. It is engineered to provide a 20mm eye relief while maintaining an extremely high degree of correction for lateral color and scatter. This 4mm focal length is primarily intended for critical lunar, planetary, and double-star observation in systems where high power is required without sacrificing viewing comfort.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e20mm Eye Relief and Mechanical Versatility\u003c\/h3\u003e\n      \u003cp\u003eThe consistent 20mm eye relief and sliding, locking eyeguard assembly allow observers to precisely match the exit pupil position to their eye, which is essential for avoiding blackouts at such short focal lengths. This mechanical design prevents the \"finicky\" eye placement often associated with ultra-short focal length wide-angle eyepieces.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDioptrx Compatibility:\u003c\/strong\u003e The 1.25-inch housing is fully compatible with the Tele Vue Dioptrx corrector, enabling users to correct for eyesight astigmatism without wearing spectacles.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLocking Eyeguard:\u003c\/strong\u003e The adjustable housing can be set and locked at a specific height, ensuring repeatable eye placement for extended sessions on objects like Mars or Jupiter.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eHigh-Magnification Utility in f\/ratio Systems\u003c\/h3\u003e\n      \u003cp\u003eIn an f\/7 refractor, the Tele Vue DeLite 4mm produces a 0.57mm exit pupil and high magnification, suitable for resolving the Rima Hadley on the Moon or the GRS on Jupiter. In an f\/10 Schmidt-Cassegrain (SCT), it yields a 0.4mm exit pupil, reaching the upper limits of useful magnification for splitting tight double stars like Beta Cygni (Albireo) under excellent atmospheric conditions.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSmall Exit Pupil Geometry:\u003c\/strong\u003e The 4mm focal length maintains a 0.8mm exit pupil in f\/5 Newtonians, providing sufficient image brightness for high-power views of the Hercules Cluster (M13).\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eGroup B Parfocality:\u003c\/strong\u003e This eyepiece is parfocal with Tele Vue's 1.25-inch Plössl, Panoptic, and Nagler designs, minimizing focus travel when changing magnifications.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOperational Comparison\u003c\/h3\u003e\n      \u003cp\u003eThe Tele Vue DeLite 4mm offers a specific balance of mass, eye relief, and field size compared to other short focal length Tele Vue designs.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003evs. Tele Vue 4.5mm Delos:\u003c\/strong\u003e The DeLite 4mm is roughly 30% lighter and smaller, making it easier to balance on lightweight mounts, though it provides 10° less apparent field.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003evs. Tele Vue 3-6mm Nagler Zoom:\u003c\/strong\u003e The DeLite 4mm provides a wider 62° field (vs 50°) and significantly longer eye relief (20mm vs 10mm), allowing for more comfortable long-duration viewing.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue DeLite 4mm compatible with Dioptrx?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eYes, the Tele Vue DeLite 4mm features a removable eyeguard that permits the installation of a Dioptrx corrector, allowing observers with astigmatism to see sharp detail without wearing glasses.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Tele Vue DeLite 4mm compare to the 4.5mm Delos?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eThe Tele Vue DeLite 4mm is more compact and weighs significantly less than the 4.5mm Delos, which is beneficial for binoviewer use. While the Delos has a 72° field, both share the same 20mm eye relief and high-contrast optical coatings.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Tele Vue DeLite 4mm work in an f\/10 SCT?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eIn an f\/10 system, the Tele Vue DeLite 4mm produces very high magnification (500x in a 2000mm FL scope) and a 0.4mm exit pupil. This is typically only useful during nights of exceptional atmospheric stability for lunar and double star work.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the field stop diameter of the Tele Vue DeLite 4mm?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eThe Tele Vue DeLite 4mm has a 4.3mm field stop. This determines the true field of view, which can be calculated by dividing the field stop by the telescope's focal length and multiplying by 57.3.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e62°\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e4.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e7.6 oz (215 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eParfocal\u003c\/td\u003e\n\u003ctd\u003eGroup B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n \u003cli\u003e\n    \u003cdiv\u003e\n      \u003cul class=\"DAV-grid\"\u003e\n        \u003cli class=\"DAV-grid-item\"\u003e\n          \u003cimg alt=\"DeLite 4mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-Delite-4mm-Eyepiece-1.jpg?v=1776301479\" class=\"DAV-img-box\"\u003e\n          \u003cdiv\u003e\n            \u003cp class=\"DAV-item-title\"\u003eDeLite 4mm Eyepiece\u003c\/p\u003e\n            \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n        \u003cli class=\"DAV-grid-item\"\u003e\n          \u003cimg alt=\"Dust Cap Top\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-2inch-Dustcap.jpg?v=1774403118\" class=\"DAV-img-box\"\u003e\n          \u003cdiv\u003e\n            \u003cp class=\"DAV-item-title\"\u003eDust Cap (Top)\u003c\/p\u003e\n            \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n        \u003cli class=\"DAV-grid-item\"\u003e\n          \u003cimg alt=\"1.25-inch Dust Cap\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-Dust-Cap-1-25inch-Bottom.jpg?v=1776216395\" class=\"DAV-img-box\"\u003e\n          \u003cdiv\u003e\n            \u003cp class=\"DAV-item-title\"\u003eDust Cap (Bottom)\u003c\/p\u003e\n            \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n    \u003cdiv\u003e\n      \u003cul class=\"DAV-grid\"\u003e\n        \u003cli class=\"DAV-grid-item\"\u003e\n          \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-DeLite-Manual.pdf?v=1776216181\" target=\"_blank\"\u003e\n            \u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n            \u003cdiv\u003e\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\u003c\/div\u003e\n          \u003c\/a\u003e\n        \u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n    \u003cp\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/televue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTeleVue 5-Year Limited Warranty for Telescopes and Accessories\u003c\/a\u003e\u003c\/p\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51174935953693,"sku":"TV-EDE-04.0","price":427.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-Delite-4mm-Eyepiece-1.jpg?v=1776303000","url":"https:\/\/davidastro.com\/fr\/products\/tele-vue-delite-4mm-62-eyepiece","provider":"David Astro","version":"1.0","type":"link"}