{"product_id":"tele-vue-nagler-t6-13mm-82-eyepiece","title":"Tele Vue Nagler T6 13mm 82° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n  \u003cli\u003e13mm Focal Length\u003c\/li\u003e\n  \u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n  \u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n  \u003cli\u003e12mm Eye Relief\u003c\/li\u003e\n  \u003cli\u003e17.6mm 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 Nagler Type 6 13mm 82° Eyepiece - 1.25\"\u003c\/h2\u003e\n      \u003cp\u003eThe Tele Vue Nagler Type 6 13mm is often the most utilized optic in an observer's kit, providing a mid-range magnification that balances deep-sky reach with a manageable exit pupil. It serves as a practical entry point into ultra-wide-field observing for those who find 100° fields difficult to navigate or overly taxing on eye placement. In an 8-inch f\/10 SCT, this eyepiece yields 154x magnification, a versatile power for resolving globular clusters like M13 while maintaining a dark sky background.\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\u003e17.6mm Field Stop and Framing Reality\u003c\/h3\u003e\n      \u003cp\u003eThis eyepiece is sized for \"set and forget\" observing, where the 17.6mm field stop allows you to keep an object centered longer in non-tracking telescopes compared to a standard Plössl. In an f\/6 Newtonian, the resulting 2.2mm exit pupil is large enough to keep the Orion Nebula (M42) bright while the 82° field provides the physical space to see the outer dust lanes. The compact 1.25-inch form factor ensures the telescope remains balanced, avoiding the frequent re-balancing required by heavier 2-inch wide-field optics.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e82° AFOV:\u003c\/strong\u003e Delivers an immersive experience that fills the primary visual field without requiring the \"head-swivel\" movement often necessary for 100° designs.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e7-Element Optical Train:\u003c\/strong\u003e Maintains sharp star points across the field in fast f\/4.5 systems, reducing the need to swap eyepieces when moving from the center to the edge of the frame.\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 and Trade-offs\u003c\/h3\u003e\n      \u003cp\u003eThe Tele Vue Nagler Type 6 13mm is a specialized tool for observers who prioritize a lightweight, high-transmission path over long eye relief or extreme field width. It represents a specific mechanical choice for binoviewer users who require narrow housings to accommodate interpupillary distances.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003evs. Tele Vue Delos 14mm:\u003c\/strong\u003e The Delos offers 20mm of eye relief for comfortable use with glasses, but the 13mm Nagler provides a wider field in a package half the weight.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003evs. 13mm Plössl:\u003c\/strong\u003e While a Plössl has fewer glass elements, its 50° field physically cannot frame the full extent of the North American Nebula (NGC 7000) at this focal length.\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 Nagler Type 6 13mm suitable for eyeglass wearers?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWith 12mm of eye relief, the \u003cstrong\u003eTele Vue Nagler Type 6 13mm\u003c\/strong\u003e is typically used without glasses to see the full 82° field. Observers with significant astigmatism may prefer the \u003cstrong\u003eTele Vue Delos\u003c\/strong\u003e or \u003cstrong\u003eDeLite\u003c\/strong\u003e series which offer 20mm of eye relief.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the 13mm Nagler for a binoviewer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eTele Vue Nagler Type 6 13mm\u003c\/strong\u003e features a slim 1.9-inch maximum diameter, making it one of the few ultra-wide eyepieces that comfortably fits \u003cstrong\u003ebinoviewers\u003c\/strong\u003e for observers with narrow interpupillary distances. Its light weight also prevents excess strain on the binoviewer's internal prisms.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 13mm Nagler require a coma corrector?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile the \u003cstrong\u003eTele Vue Nagler Type 6 13mm\u003c\/strong\u003e is corrected for edge-of-field aberrations, Newtonians faster than f\/5 will still show coma inherent to the telescope mirror. Using a \u003cstrong\u003eTele Vue Paracorr\u003c\/strong\u003e is recommended to achieve diffraction-limited performance across the entire 82° field.\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\u003e13 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e17.6 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\u003e0.40 lbs (6.4 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLens Elements\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eParfocal Group\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=\"Nagler 13mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Nagler-13mm-Eyepiece-1.jpg?v=1776224242\" class=\"DAV-img-box\"\u003e\n          \u003cdiv\u003e\n            \u003cp class=\"DAV-item-title\"\u003eNagler 13mm Type 6 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-Nagler-T6-13mm-82-Eyepiece-Manual.pdf?v=1776224731\" 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\n","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51170897920285,"sku":"TV-EN6-13.0","price":391.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Nagler-13mm-Eyepiece-1.jpg?v=1776225124","url":"https:\/\/davidastro.com\/en-eu\/products\/tele-vue-nagler-t6-13mm-82-eyepiece","provider":"David Astro","version":"1.0","type":"link"}