{"title":"TeleVue Nagler 82° Eyepieces","description":"\u003cp\u003eTeleVue Nagler eyepieces popularized the 82° apparent field of view, giving wide, sharp views for deep-sky objects and planets. This collection covers several generations, from Type 4 to Type 7.\u003c\/p\u003e\u003cp\u003eModels include the Type 6 in 3.5mm to 13mm for 1.25\" focusers, the Type 7 from 5.5mm to 19mm, the Type 5 16mm and 31mm, and the Type 4 22mm. The Nagler Zoom 3-6mm is a compact 50° zoom for high-power planetary viewing.\u003c\/p\u003e","products":[{"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","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51170897920285,"sku":"TV-EN6-13.0","price":533.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Nagler-13mm-Eyepiece-1.jpg?v=1776225124"},{"product_id":"tele-vue-nagler-t5-31mm-82-eyepiece","title":"Tele Vue Nagler T5 31mm 82° Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e31mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2\" Diameter Barrel\u003c\/li\u003e\n\u003cli\u003e19mm Eye Relief\u003c\/li\u003e\n\u003cli\u003e42mm 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 T5 31mm 82° Eyepiece - 2\"\u003c\/h2\u003e\n      \u003cp\u003eThe Type 5 31mm Nagler delivers the maximum possible true field of view in a 2-inch format while maintaining an expansive 82° apparent field. Known affectionately as \"The Terminator,\" this six-element powerhouse is designed to provide a spacewalk perspective that remains sharp across the entire focal plane. It serves as the definitive low-power tool for large-aperture Dobsonians and fast refractors where framing massive celestial structures is the priority.\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\u003eTrue Field and Edge Performance\u003c\/h3\u003e\n      \u003cp\u003eBy utilizing a 42mm field stop, the 31mm Nagler pushes the physical limits of the 2-inch barrel to maximize the amount of sky visible at moderate magnifications. This allows for high-contrast views of expansive targets like the Orion nebula or the Pleiades without sacrificing the magnification needed to resolve fine structural details.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNagler Contrast:\u003c\/strong\u003e Full multi-coatings and blackened lens edges eliminate internal reflections, ensuring a dark background sky even near bright lunar or planetary targets.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eField Correction:\u003c\/strong\u003e The Nagler design effectively minimizes astigmatism and lateral color, keeping star points tight and undistorted from the center to the field stop.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eEyeglass Compatibility:\u003c\/strong\u003e 19mm of eye relief ensures that most observers can take in the full 82° field without removing their glasses.\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\u003eHandling and Mechanical Considerations\u003c\/h3\u003e\n      \u003cp\u003eDue to its significant 2.2 lb mass, the 31mm Nagler requires intentional management of telescope balance and focuser tension. The rubberized grip ring ensures secure handling in cold environments or when wearing gloves, providing confidence during eyepiece swaps.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFocuser Load:\u003c\/strong\u003e The weight of this eyepiece can cause slip in friction-based focusers; ensure your drawtube tension is adjusted to prevent focal shift.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Given its physical volume, this eyepiece requires a dedicated large-format foam cutout in your accessory case to prevent movement during transport.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSafety Taper:\u003c\/strong\u003e The 2\" barrel is machined with a safety undercut to prevent the eyepiece from falling out of the diagonal or focuser should the set screw loosen.\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\u003eFlagship eyepieces are defined by the trade-off between apparent field, exit pupil, and physical portability.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003evs. Tele Vue 41mm Panoptic:\u003c\/strong\u003e The 41mm Panoptic offers a slightly larger 46mm field stop, but the 31mm Nagler provides higher magnification and a much more immersive 82° apparent field.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003evs. Tele Vue 31mm Nagler (Type 4):\u003c\/strong\u003e While the Type 5 is the modern standard, the previous Type 4 designs focused on even longer eye relief at the cost of a slightly larger physical footprint.\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\"\u003eWill the 31mm Nagler work well with an f\/4.5 telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, but it produces a 6.9mm exit pupil; if your eye's pupil cannot dilate this wide, you will lose light and may see the secondary mirror shadow in reflectors.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs a Paracorr necessary for this eyepiece?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIn fast Newtonian systems (f\/5 or faster), the wide field will make mirror coma very obvious at the edges, so a Tele Vue Paracorr is highly recommended to maintain sharpness.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 31mm Nagler on a 1.25\" focuser?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this is a dedicated 2\" eyepiece; the 42mm field stop is physically too large to be supported by the 1.25\" format.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I prevent the eyepiece from fogging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eDue to the large mass of glass, it takes longer to reach ambient temperature; using dew heater strips or keeping the eyepiece in a pocket when not in use is recommended.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes it include Dioptrx compatibility?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, the top of the eyepiece is designed to accept Tele Vue Dioptrx astigmatism correctors, allowing for glasses-free observing.\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\u003eModel #\u003c\/td\u003e\n\u003ctd\u003eEN5-31.0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e31 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\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\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e42 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.2 lbs (1000 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eElements\/Groups\u003c\/td\u003e\n\u003ctd\u003e6 \/ 4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-Nagler-31mm-Eyepiece-1.jpg?v=1776474226\" alt=\"Tele Vue 31mm Nagler Eyepiece\" class=\"DAV-img-box\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e31mm Nagler 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 src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-2inch-Dustcap.jpg\" alt=\"2-inch Dust Caps\" class=\"DAV-img-box\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.televue.com\/pdf\/literature\/Nagler%20Type%204%20and%205%20Instructions.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/televue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51181118128413,"sku":"TV-EN5-31.0","price":1104.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-Nagler-31mm-Eyepiece-1.jpg?v=1776474226"},{"product_id":"tele-vue-nagler-t4-22mm-82-degree-eyepiece-2-inch","title":"Tele Vue Nagler T4 22mm 82° Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 22mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 2-inch\u003c\/li\u003e\n\u003cli\u003eEye Relief: 19mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 31.1mm\u003c\/li\u003e\n\u003cli\u003eParacorr Type 2 Optimized\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\u003eManual\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eThe Deep-Sky Spacewalk: A 22mm Nagler Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T4 22mm 82° Eyepiece is a definitive low-power, wide-field eyepiece designed for observers seeking the most immersive views possible from their telescopes. It delivers a vast, corrected window on the universe that feels less like looking through an instrument and more like floating in space. For owners of Dobsonian reflectors, Schmidt-Cassegrains, and large refractors, the 22mm Nagler provides the perfect balance of magnification and true field for sweeping the Milky Way and framing large deep-sky objects.\u003c\/p\u003e\n\u003cp\u003eThis eyepiece isn't simply about providing a wide view; it's about ensuring that view is sharp, contrasty, and comfortable from edge to edge. Every element of its design, from the glass to the coatings to the mechanical housing, is engineered to remove distractions and connect you directly to the target. It's the eyepiece you reach for when you want to see an object in its full galactic context.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Nagler Type 4 Optical Engine\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 22mm Nagler is the Type 4 optical design, a sophisticated arrangement of high-index glass that corrects for aberrations like astigmatism and field curvature. This means stars remain sharp points not just in the center, but across the entire expansive 82° field. The result is a flat, distortion-free canvas that allows you to explore the full view without chasing focus or losing detail at the periphery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn 82° Apparent Field of View\u003c\/h3\u003e\n\u003cp\u003eThe 82° apparent field of view is the signature of the Nagler design, creating the famous \"spacewalk\" effect. This is not a gimmick. By filling your peripheral vision, the eyepiece removes the sense of a boundary, allowing your eye to relax and scan the starfield naturally. When viewing the Veil Nebula or the Andromeda Galaxy, this immersive presentation lets you trace faint structures and outlying star clusters in a single, cohesive view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFully Multi-Coated Optics for Maximum Contrast\u003c\/h3\u003e\n\u003cp\u003eEvery glass-to-air surface in the 22mm Nagler T4 receives multiple layers of anti-reflective coatings. This meticulous process maximizes light transmission, which is critical for observing faint deep-sky objects. The direct visual benefit is a darker sky background and enhanced contrast, allowing the delicate tendrils of nebulosity and the faint arms of galaxies to stand out against the void.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComfortable Viewing with the Insta-just Eyeguard\u003c\/h3\u003e\n\u003cp\u003eA generous 19mm of eye relief makes the 22mm Nagler comfortable for all observers, including those who wear eyeglasses. To make this long eye relief perfectly usable, Tele Vue developed the Insta-just eyeguard. This click-stop mechanism lets you instantly set and lock the eyeguard height, ensuring your eye is positioned at the ideal distance to see the full field of view without blackouts or stray light interference, night after night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for Fast Reflectors with Paracorr\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T4 design is specifically engineered to work as a system with the Tele Vue Paracorr Type 2 coma corrector. Owners of fast Newtonians and Dobsonians (f\/5 or faster) can achieve tack-sharp stars across the entire 82° field, correcting the coma inherent in their telescope's optics. This synergy turns a fast reflector into an uncompromising wide-field instrument, delivering views that are as sharp at the edge as they are in the center.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRobust Mechanical Design and Safety\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece is built for a lifetime of use in the field. A textured rubber grip ensures secure handling, even with gloves on, while the 2-inch barrel features a machined undercut, or safety kerf. This groove gives your focuser's set screw a positive lock, significantly reducing the risk of the heavy eyepiece accidentally slipping out and falling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Window on the Cygnus Loop\u003c\/h3\u003e\n\u003cp\u003eIn a 12-inch f\/5 Dobsonian with a quality O-III filter, the 22mm Nagler T4 transforms the Cygnus Loop. At this focal length, the magnification is low enough to frame either the Eastern or Western Veil in its entirety. As your eye adapts, the nebula resolves from a ghostly arc into a complex, three-dimensional network of filaments. The sharp, wide field allows you to follow the delicate, intertwined strands against a dark background, providing a sense of scale and structure that higher magnifications miss.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eConsiderations and Trade-Offs\u003c\/h3\u003e\n\u003cp\u003eThe optical performance of the 22mm Nagler T4 is accompanied by significant size and weight. Observers using smaller equatorial mounts will need to ensure their system is properly counterbalanced. Furthermore, while the eyepiece performs well in any telescope, achieving its full potential in reflectors faster than f\/6 requires pairing it with a Paracorr, which represents an additional investment in the optical train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Your Wide-Field Nagler\u003c\/h3\u003e\n\u003cp\u003eThe Tele Vue Nagler family offers several options for immersive, low-power viewing. The 22mm T4 occupies a crucial sweet spot.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler 16mm T5:\u003c\/strong\u003e The 16mm provides a step up in magnification and a darker sky background, making it a better choice for resolving detail in smaller galaxies or planetary nebulae. The 22mm T4 offers a wider true field of view, making it the superior choice for scanning and observing very large objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler 31mm T5:\u003c\/strong\u003e The 31mm is the ultimate low-power eyepiece, delivering the widest possible true field in the 82° series. However, it is substantially larger, heavier, and more expensive. The 22mm T4 provides a similarly immersive experience in a more manageable and affordable package, making it a more practical choice for many observers and telescope systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr for the 22mm Nagler T4?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf your telescope is a Newtonian or Dobsonian reflector with a focal ratio of f\/5 or faster, using a Paracorr Type 2 is highly recommended. It will correct the coma inherent in the telescope, ensuring stars are pinpoint sharp across the entire 82° field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 22mm Nagler a good choice for an SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice for Schmidt-Cassegrain and Maksutov-Cassegrain telescopes. It will provide a wide true field of view at low magnification, which is ideal for locating objects and observing large star clusters and nebulae that would otherwise not fit in the view of a shorter focal length eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 22mm Nagler T4 compare to the 17mm Nagler T4?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 22mm Nagler provides lower magnification and a wider true field of view, making it better for large, diffuse objects like the North America Nebula. The 17mm Nagler offers higher magnification, which helps to darken the sky background and provides more resolution for smaller objects like the Ring Nebula or globular clusters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Type 4\" mean in the Nagler series?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \"Type\" number indicates a specific optical and mechanical design generation within the Nagler series. The Type 4 eyepieces are known for their long eye relief and inclusion of the Insta-just adjustable eyeguard, making them particularly comfortable for all observers, including those who wear glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 19mm eye relief on the Nagler T4 comfortable with glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 19mm of eye relief is very generous and is specifically designed to allow most eyeglass wearers to see the entire 82° field of view comfortably. The adjustable eyeguard helps you find the perfect distance for your specific glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN4-22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e22mm\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e31.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.50 lbs (680 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e5.25\" x 2.7\" dia.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T4 22mm 82° 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_4_22mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879090461,"sku":"TV-EN4-22.0","price":771.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T4_22mm_Eyepiece_1.jpg?v=1777515025"},{"product_id":"tele-vue-nagler-t5-16mm-82-degree-eyepiece","title":"Tele Vue Nagler T5 16mm 82° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 16mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 10mm\u003c\/li\u003e\n\u003cli\u003eField Stop: 22.1mm\u003c\/li\u003e\n\u003cli\u003eWeight: 0.44 lbs (201g)\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\u003eManuals\/Downloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eThe Spacewalk View in a Compact Form Factor\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T5 16mm 82° Eyepiece delivers the signature, immersive \"spacewalk\" experience in a compact and lightweight 1.25\" format. This eyepiece is engineered for observers who demand expansive, sharp-to-the-edge views but are constrained by the size, weight, or focuser limitations of larger 2\" eyepieces. It represents a critical mid-power focal length, ideal for framing detailed globular clusters, planetary nebulae, and galaxy groups in a wide, dark field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eNagler Type 5 Optical Design: Wide-Field Correction\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 16mm Nagler is a 6-element optical design that manages the complex corrections required for an 82° apparent field. This design controls for aberrations like coma and astigmatism, which would otherwise stretch stars into unflattering shapes at the edge of the field in fast telescopes. The result is a flat, sharp field where stars remain tight points from the center to the edge, preserving the natural appearance of star clusters and rich fields.\u003c\/p\u003e\n\u003cp\u003eThis level of correction is what separates a Nagler from simpler wide-field designs. It ensures that the immersive quality of the view isn't compromised by distracting distortions. The observer's eye can relax and roam across the entire field, trusting that the view at the edge is as faithful as the view in the center.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Apparent Field of View Experience\u003c\/h3\u003e\n\u003cp\u003eThe 82° apparent field of view (AFOV) is the defining feature of the Nagler family. This geometry is so wide that the edge of the field is not immediately visible to the relaxed eye, creating the sensation of looking through a window into space rather than looking through an eyepiece. This effect makes objects feel suspended in a vast, black background, enhancing the context and scale of deep-sky targets.\u003c\/p\u003e\n\u003cp\u003eWith the 16mm focal length in a telescope with a 1200mm focal length, for example, the Ring Nebula (M57) is framed perfectly at 75x magnification. You see not just the nebula itself, but the surrounding star patterns and the faint foreground stars within the ring, all presented in a single, cohesive view that feels like a porthole on a spacecraft.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMaximum Contrast from Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eEvery air-to-glass surface in the Nagler T5 16mm receives a robust, multi-layer anti-reflective coating. This is not a trivial detail. These coatings are tuned to maximize light throughput at critical wavelengths and to suppress internal reflections that manifest as ghosting and flare, which can wash out faint detail.\u003c\/p\u003e\n\u003cp\u003eThe practical benefit is a view with higher contrast and darker sky backgrounds. Faint extensions on galaxies or delicate wisps of nebulosity stand out more clearly against the blackness of space. When observing a bright object like Jupiter, these coatings mean you see crisp detail in the cloud bands without a distracting halo of scattered light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComfort and Usability: Eye Relief and Mechanics\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T5 series features a 10mm eye relief, which is a key trade-off for its compact size. While comfortable for many observers, it can be tight for those who must wear eyeglasses to correct for significant astigmatism. The adjustable rubber eyeguard helps you find the optimal eye position to see the full field of view and blocks stray light from the side, improving perceived contrast.\u003c\/p\u003e\n\u003cp\u003eThe physical construction is designed for confident handling in the dark. A textured rubber grip ring provides a secure hold, while the chrome-plated 1.25\" barrel resists wear and includes a safety undercut to prevent it from accidentally slipping out of the focuser. The barrel is also threaded to accept standard 1.25\" astronomy filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eParfocal Design for an Efficient Workflow\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece is designed to be nearly parfocal with other Tele Vue eyepieces in the 1.25\" family, such as Plössls, Panoptics, and Delos models. This means that when you switch from another eyepiece in this group to the 16mm Nagler, you will need to make only a minimal adjustment to the focuser. This is a significant workflow advantage during an observing session.\u003c\/p\u003e\n\u003cp\u003eThis design feature saves valuable time at the telescope, keeping your target centered and in near-focus as you change magnifications. This allows you to quickly compare views at different image scales without the frustrating process of having to completely re-acquire and refocus the object each time you swap eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Your Nagler: The 16mm T5 vs. Siblings\u003c\/h3\u003e\n\u003cp\u003eThe Nagler eyepiece family offers several choices, and selecting the right one depends on your telescope and observing goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler 13mm T6:\u003c\/strong\u003e The 13mm T6 is even smaller and lighter, with a longer 12mm eye relief, making it slightly more comfortable for eyeglass wearers. The 16mm T5, however, provides a wider true field of view and a larger exit pupil, making it a better choice for framing larger objects or for use in telescopes with longer focal lengths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler 22mm T4 (2\"):\u003c\/strong\u003e The 22mm T4 is a 2\" eyepiece that delivers a significantly wider true field of view, making it a superior choice for sweeping large nebulae or finding objects. The 16mm T5 is the right choice when your telescope has a 1.25\" only focuser, or when you need the higher magnification and darker sky background it provides for resolving details in smaller targets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 16mm Nagler T5 good for someone who wears glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 10mm eye relief is considered short for eyeglass wearers. While some may be able to see most of the field, those with significant astigmatism who cannot remove their glasses may find it difficult to see the full 82° view. For better eye relief, consider the Tele Vue Delos line.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the best use for the 16mm Nagler T5 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis eyepiece excels at medium-power, wide-field views of deep-sky objects. It is ideal for resolving the cores of globular clusters like M13, framing medium-sized open clusters, and observing planetary nebulae and smaller galaxies with their surrounding star fields.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this eyepiece work well in my fast f\/4.5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, Nagler eyepieces are specifically designed to deliver sharp, well-corrected views in fast telescopes. A Paracorr Type 2 coma corrector is still recommended to achieve the sharpest possible stars across the entire field, but the eyepiece itself performs very well in fast systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 16mm Nagler T5 compare to the 17.3mm Delos?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 17.3mm Delos offers a smaller 72° apparent field but has a much more comfortable 20mm of eye relief, making it a better choice for eyeglass wearers. The Nagler T5 provides a more immersive, \"spacewalk\" feeling due to its wider 82° field, but at the cost of shorter eye relief.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"parfocal\" mean for this eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt means the 16mm Nagler T5 requires little to no refocusing when you switch it with most other 1.25\" Tele Vue eyepieces (like Panoptics or Plössls). This saves time and makes it easier to change magnifications without losing your target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN5-16.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e16mm\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\u003eApparent Field of View (AFOV)\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\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eNagler Type 5 (6 elements in 4 groups)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e22.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eYes (1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParfocal\u003c\/td\u003e\n\u003ctd\u003eYes, with Tele Vue Group B eyepieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 lbs \/ 7.1 oz \/ 201 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e3.1\" \/ 79mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Diameter\u003c\/td\u003e\n\u003ctd\u003e1.9\" \/ 48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T5 16mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Top Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Bottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_5_16mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879123229,"sku":"TV-EN5-16.0","price":585.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T5_16mm_Eyepiece_1.jpg?v=1777515025"},{"product_id":"tele-vue-nagler-t6-9mm-82-degree-eyepiece","title":"Tele Vue Nagler T6 9mm 82° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 9mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 12mm\u003c\/li\u003e\n\u003cli\u003eOptical Elements: 7\u003c\/li\u003e\n\u003cli\u003eWeight: 0.42 lbs \/ 190 g\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\u003eManuals\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003c!-- TAB-MARKER-1: DESCRIPTION --\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\u003eThe Spacewalk View in a Compact Barrel: The 9mm Nagler T6 Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T6 9mm is an 82° wide-field eyepiece that delivers the famous \"spacewalk\" viewing experience in a compact and lightweight 1.25\" format. It is engineered for observers who demand immersive, high-contrast views at a useful medium-high magnification without the weight and balance challenges of larger 2\" eyepieces. This makes it an ideal choice for planetary detail, tight double stars, and resolving globular clusters in any telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Seven-Element Nagler Optical Engine\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 9mm T6 is Al Nagler's renowned seven-element optical design. This specific arrangement of lenses, including high-index glass, is what makes the 82° apparent field possible while controlling for aberrations like astigmatism and field curvature, even in fast f\/ratio telescopes. The result is an image that presents sharp, point-like stars across the majority of the expansive field of view.\u003c\/p\u003e\n\u003cp\u003eThis level of correction means you can study objects for longer without constantly re-centering them. When observing the core of the Hercules Globular Cluster (M13), individual stars resolve into sharp pinpricks not just in the center, but deep into the surrounding field, creating a true sense of immersion that simpler designs cannot match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn Immersive 82° Apparent Field of View\u003c\/h3\u003e\n\u003cp\u003eThe 82° apparent field of view is the defining feature of the Nagler experience. This wide vista fills your eye's field of perception, causing the eyepiece body to effectively disappear. The effect is less like looking through a telescope and more like looking out of a window into space, which is why it earned the \"spacewalk\" nickname.\u003c\/p\u003e\n\u003cp\u003eOn a target like the Orion Nebula (M42), the 9mm focal length in a moderately-sized Dobsonian provides enough magnification to resolve the Trapezium stars cleanly, while the 82° field is wide enough to frame the surrounding nebulosity. This allows you to see the object within its greater context, a quality often lost with narrow-field planetary eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast-Optimized Coatings and Baffling\u003c\/h3\u003e\n\u003cp\u003eEvery air-to-glass surface in the Nagler T6 is fully multi-coated to maximize light throughput and prevent ghosting or flare. Furthermore, the lens edges are meticulously blackened to absorb stray light that would otherwise reduce contrast. This attention to internal reflection control is critical for teasing out faint details.\u003c\/p\u003e\n\u003cp\u003eWhen observing a bright object like Jupiter, these features directly translate to seeing more subtle detail. You will find it easier to distinguish between faint cloud belts and pick out low-contrast ovals and festoons. The background sky remains truly black, making the planet's disk appear to float in space with enhanced definition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePractical Ergonomics and Eye Relief\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T6 series was designed to be parfocal, meaning you should need little to no refocusing when switching between different focal lengths in the series. The 9mm model provides 12mm of eye relief, which is comfortable for most observers who do not require eyeglasses. A soft, fold-down rubber eyeguard helps position the eye correctly and blocks stray light from the side.\u003c\/p\u003e\n\u003cp\u003eThe main trade-off for its compact size and wide field is the eye relief. Observers who must wear glasses to correct for significant astigmatism may not be able to see the entire 82° field at once. For those users, the Tele Vue Delos line, with its 20mm of eye relief, would be a more suitable choice, though it offers a smaller 72° apparent field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Versatile 1.25\" Barrel Design\u003c\/h3\u003e\n\u003cp\u003eThe standard 1.25\" barrel makes the Nagler T6 9mm compatible with virtually any telescope, from small refractors to large Dobsonians. It includes standard 1.25\" filter threads for use with nebula or planetary filters. A machined undercut on the barrel helps secure the eyepiece in focusers with compression rings or thumbscrews, reducing the risk of it accidentally slipping out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Your Nagler T6 Magnification\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T6 series offers a range of focal lengths designed to work together as a system. The 9mm hits a sweet spot for many observers, providing a significant step up in magnification from a typical low-power eyepiece.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNagler T6 13mm:\u003c\/strong\u003e The next step down in magnification, ideal for framing larger deep-sky objects or for use on nights with less-than-perfect seeing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNagler T6 9mm:\u003c\/strong\u003e The subject of this page, this is often the go-to choice for globular clusters, planetary nebulae, and detailed views of Jupiter and Saturn.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNagler T6 7mm:\u003c\/strong\u003e A higher-power option for nights of good seeing when you want to push magnification on planets, the moon, or for splitting tight double stars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor an observer with an 8\" f\/6 Dobsonian, the 9mm T6 yields 133x, a perfect magnification for resolving the core of M13 or seeing detail in Saturn's rings, including the Cassini Division. It provides a noticeable jump in image scale without being so powerful that it is often unusable due to atmospheric turbulence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-2: FAQ --\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Nagler T6 9mm good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is an excellent choice for planetary viewing. The high-contrast optics reveal subtle cloud belt details on Jupiter and fine divisions in Saturn's rings, while the 82° field provides a comfortable and immersive viewing experience.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I be able to see the whole 82° field with glasses on?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 12mm of eye relief is tight for most eyeglass wearers. While you can use it with glasses, you will likely not be able to see the full 82° field of view at once. For comfortable viewing with glasses, consider the Tele Vue Delos or DeLite series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Nagler T6 9mm compare to the Nagler T5 9mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler T6 series is smaller, lighter, and parfocal, making it more convenient to switch between different T6 eyepieces. The optical performance is very similar, with the T6 line being the more modern and compact design choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this eyepiece good for a fast Dobsonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. Nagler eyepieces are specifically designed to deliver sharp stars to the edge of the field in fast (f\/4 to f\/5) telescopes. For the best performance in very fast Newtonians, it should be used with a Tele Vue Paracorr coma corrector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between a Nagler and a Plössl eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Nagler eyepiece uses a complex 7-element design to provide a very wide 82° apparent field of view with good edge correction. A Plössl uses a simpler 4-element design, resulting in a narrower field of view (around 50°) but often at a lower cost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to get the whole Nagler T6 set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, each eyepiece stands on its own. The 9mm is a very popular and useful single focal length for medium-to-high power observing. The benefit of the set is that the eyepieces are parfocal, minimizing refocusing time when you switch between them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-3: SPECIFICATIONS --\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN6-09.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e9mm\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e7 elements in 4 groups (Nagler)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e12.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003e1.25\" Standard (M28.5 x 0.6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParfocal\u003c\/td\u003e\n\u003ctd\u003eYes, with other Nagler Type 6 eyepieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.42 lbs (190 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e3.2 in (81.3 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Diameter\u003c\/td\u003e\n\u003ctd\u003e1.9 in (48.3 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-4: IN THE BOX --\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T6 9mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003c!-- TAB-MARKER-5: MANUAL --\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_6_9mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-6: WARRANTY --\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879155997,"sku":"TV-EN6-09.0","price":533.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T6_9mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t6-7mm-82-degree-eyepiece","title":"Tele Vue Nagler T6 7mm 82° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 7mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 12mm\u003c\/li\u003e\n\u003cli\u003eOptical Elements: 7\u003c\/li\u003e\n\u003cli\u003eWeight: 0.50 lbs \/ 227 g\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\u003eManuals\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eThe Spacewalk Experience in a Compact Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T6 7mm 82° Eyepiece delivers the celebrated \"spacewalk\" view in a compact and lightweight 1.25\" format. This high-magnification eyepiece is engineered for observers using any telescope, but its performance shines in fast Dobsonians and refractors where its advanced optical correction provides sharp, high-contrast planetary and deep-sky views across its entire expansive field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Nagler Type 6 Optical Engine\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this eyepiece is the 7-element Nagler Type 6 design, a significant evolution of the original \"spacewalk\" concept. This specific optical formula is designed to deliver a consistently sharp, flat 82° apparent field of view with excellent control over pupil-induced aberrations. The result for you is an immersive viewing window where stars remain tight points from the center all the way to the field stop.\u003c\/p\u003e\n\u003cp\u003eThis level of correction makes the 7mm Nagler T6 a powerful tool for planetary observation and for resolving fine detail in smaller deep-sky objects. On a target like the Orion Nebula's Trapezium, the four primary stars resolve into hard, brilliant diamonds, while the surrounding nebulosity fills your entire field of vision without distortion, creating a sense of total immersion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Index Glass and Full Multi-Coatings\u003c\/h3\u003e\n\u003cp\u003eTele Vue utilizes specialized high-index glass to achieve the demanding light-bending requirements of the Nagler design within a small physical package. This choice of materials allows for superior control of chromatic aberration, meaning you see the target's true color without distracting false-color fringing, even on bright objects like Jupiter or the lunar limb.\u003c\/p\u003e\n\u003cp\u003eEvery air-to-glass surface receives a robust multi-coating optimized for maximum light throughput. This ensures the image you see is as bright and contrasty as possible. Faint details, like the spiral arms in the Whirlpool Galaxy or subtle banding on Saturn, are rendered with more clarity because less light is lost to reflection and scatter within the eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComfort and Control with the Instadjust Eyeguard\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T6 series features Tele Vue's Instadjust eyeguard, a crucial ergonomic component for enjoying the wide field. This click-stop mechanism lets you set and hold the perfect distance between your eye and the top lens, which is essential for seeing the entire 82° field comfortably, especially if you wear eyeglasses for astigmatism.\u003c\/p\u003e\n\u003cp\u003eBy extending the eyeguard, you can effectively block stray light from your surroundings from interfering with your view. This simple adjustment improves perceived contrast and allows your eye to become fully dark-adapted, making it easier to pick out faint details that might otherwise be lost in ambient light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eParfocal Design for Seamless Viewing\u003c\/h3\u003e\n\u003cp\u003eThe 7mm Nagler T6 is designed to be nearly parfocal with most other Tele Vue 1.25\" eyepieces, including Plössls, Panoptics, and Delos models. This means that when you switch from a lower-power Tele Vue eyepiece to the 7mm Nagler, you will only need a minimal turn of the focus knob to restore a sharp image.\u003c\/p\u003e\n\u003cp\u003eThis practical feature saves valuable observing time and reduces frustration. You can move from finding an object with a low-power Panoptic to magnifying it with the 7mm Nagler without losing the object from the field of view while refocusing, creating a more fluid and uninterrupted observing session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBuilt for the Field\u003c\/h3\u003e\n\u003cp\u003eThe 1.25\" barrel is a universal format, ensuring compatibility with virtually any telescope focuser or diagonal. A machined safety undercut on the barrel helps prevent the eyepiece from accidentally slipping out of the focuser if the locking screw loosens, protecting your investment.\u003c\/p\u003e\n\u003cp\u003eInside, the edges of all seven lens elements are blackened. This is a critical manufacturing step that absorbs stray light traveling sideways through the glass, preventing internal reflections that can reduce contrast. This attention to detail is a key reason why the background sky in a Nagler eyepiece appears truly black, making stars and nebulae stand out more vividly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Your High-Power Nagler\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T6 series offers a range of high-magnification options. The 7mm Nagler occupies a sweet spot for many observers, providing a significant power jump without pushing magnification beyond what typical atmospheric seeing allows.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler T6 5mm:\u003c\/strong\u003e The 5mm provides higher magnification for nights of exceptional seeing, ideal for resolving double stars or planetary detail. The 7mm offers a wider exit pupil, making it more comfortable for general use and more forgiving on nights with average atmospheric stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler T6 9mm:\u003c\/strong\u003e The 9mm offers a wider true field of view and is an excellent choice for viewing moderately sized open clusters and brighter nebulae. The 7mm provides the extra power needed to resolve globular cluster cores or get a closer view of planetary features like Jupiter's Great Red Spot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Nagler T6 7mm good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is an excellent planetary eyepiece. Its sharp optics and 82° field of view allow you to comfortably observe a planet at high magnification while letting it drift across the field for a long time before needing to adjust the telescope, which is especially useful with non-driven mounts like Dobsonians.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Nagler T6 7mm compare to a Delos 6mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler T6 7mm offers a wider 82° apparent field of view for a more immersive \"spacewalk\" feel. The Delos 6mm has a smaller 72° field but provides a longer, more comfortable 20mm of eye relief. If you wear glasses or prioritize eye comfort, the Delos is often the better choice; if maximum field of view is your goal, the Nagler is the one to get.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this eyepiece work well in my f\/5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Nagler design is specifically corrected to perform well in \"fast\" optical systems like f\/4 to f\/5 Newtonians. It will deliver sharp stars across the entire field of view where simpler eyepiece designs would show significant astigmatism or coma away from the center.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main trade-off with the Nagler T6 series?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary trade-off for the compact size and wide 82° field is the eye relief, which is 12mm for this model. While usable for many, observers who require thick eyeglasses for astigmatism may find it difficult to see the entire field of view at once and might be better served by a Delos eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr with the 7mm Nagler?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf you are using a fast Newtonian telescope (f\/5 or faster), a Paracorr is highly recommended. The Paracorr corrects coma inherent in the telescope's mirror, not the eyepiece. Using a Nagler with a Paracorr will ensure the sharpest possible stars across the entire 82° field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN6-07.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e7mm\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\u003eApparent Field of View (AFOV)\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\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElements\/Groups\u003c\/td\u003e\n\u003ctd\u003e7\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.50 lbs \/ 227 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop\u003c\/td\u003e\n\u003ctd\u003e9.7mm\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T6 7mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEyepiece Dust 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEyepiece Barrel 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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_6_7mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879188765,"sku":"TV-EN6-07.0","price":533.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T6_7mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t6-5mm-82-degree-eyepiece","title":"Tele Vue Nagler T6 5mm 82° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 5mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 12mm\u003c\/li\u003e\n\u003cli\u003eOptical Design: Nagler Type 6 (7 elements)\u003c\/li\u003e\n\u003cli\u003eWeight: 7.9 oz (0.22 kg)\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\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\u003eThe Planetary Powerhouse Nagler Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T6 5mm 82° Eyepiece is a high-magnification specialist, designed to deliver expansive, sharp views of planets and small deep-sky objects in a compact 1.25\" format. It leverages the renowned Nagler design to create an immersive \"spacewalk\" experience, transforming high-power observing from a keyhole view into a wide, engaging window on the universe. This eyepiece is for the observer who refuses to sacrifice field of view for magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eNagler Type 6 Optical Design for High Power\u003c\/h3\u003e\n\u003cp\u003eThe 5mm Nagler T6 is built on a 7-element optical design that controls aberrations like astigmatism and field curvature, even at this demanding focal length. Using a unique pairing of high-index glasses, this design delivers sharp, high-contrast images from the center to the edge of the field. The result is a flat, well-corrected view that allows you to study fine planetary detail without constant re-centering.\u003c\/p\u003e\n\u003cp\u003eThis level of correction is what separates the Nagler from simpler wide-field designs. When you use the 5mm in a quality telescope, planetary limbs are sharp, and stars in the tight cores of globular clusters resolve into distinct points. It’s an optical system engineered to handle the high magnifications needed for detailed lunar and planetary work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFully Multi-Coated for Maximum Contrast\u003c\/h3\u003e\n\u003cp\u003eEvery air-to-glass surface in the 5mm Nagler T6 receives a robust multi-coating optimized for maximum light throughput and minimal scatter. At high magnifications, where targets are often dim and subtle details are critical, this is not a luxury. The coatings ensure that the faint festoons in Jupiter's belts or the delicate Cassini Division in Saturn's rings are rendered with as much contrast as your telescope and seeing conditions will allow.\u003c\/p\u003e\n\u003cp\u003eThe lens edges are also blackened to further suppress internal reflections. This attention to detail reduces stray light, which enhances the perceived blackness of the space background. This makes faint objects, like the central stars of planetary nebulae, easier to detect against the sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Spacewalk Experience\u003c\/h3\u003e\n\u003cp\u003eThe signature feature of any Nagler is the 82° apparent field of view. At the high power a 5mm focal length provides, this wide field is transformative. Instead of a narrow, restrictive view of a planet, you see the target suspended in a wide, black field of space, allowing you to observe for longer periods without the object drifting out of sight. This makes for a more relaxed and immersive session.\u003c\/p\u003e\n\u003cp\u003eOn a target like the globular cluster M13, the 5mm Nagler provides enough power to resolve the core while the 82° field frames the cluster beautifully. The experience is less like looking *at* an object and more like being *in* the starfield. This is the core of the \"spacewalk\" effect that made the Nagler design famous.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eConsistent Eye Relief and Viewing Comfort\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T6 series was designed with a consistent 12mm of eye relief across all focal lengths. This means you can switch between them without having to significantly change your head position. The 5mm model features an adjustable rubber eyeguard that you can raise to set the perfect distance, which is crucial for blocking stray light and maintaining a stable view.\u003c\/p\u003e\n\u003cp\u003eWhile 12mm of eye relief is not enough for observers who must wear glasses to correct for significant astigmatism, it is comfortable for most users. The design provides a generous eye lens, making the eyepiece feel less constricted than typical high-power oculars. This eyepiece is also compatible with Tele Vue's DIOPTRX astigmatism correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStandard 1.25\" Barrel and Filter Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 5mm Nagler T6 uses a standard 1.25\" barrel, making it compatible with the vast majority of telescopes and focusers. The barrel is threaded to accept standard 1.25\" filters, a vital feature for planetary observers who rely on color filters to enhance specific details, like Mars's polar caps or Jupiter's Great Red Spot. The barrel also features a safety undercut to help prevent it from accidentally falling out of the focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSmall Form Factor for Easy Balancing\u003c\/h3\u003e\n\u003cp\u003eUnlike many extreme wide-field eyepieces, the Nagler T6 series is intentionally compact and lightweight. The 5mm model weighs only 7.9 ounces, which means it won’t cause significant balance issues when used in smaller refractors or on Dobsonians. Its size also means it is nearly parfocal with Tele Vue's Plössl eyepieces, minimizing the amount of refocusing needed when switching between low-power finding and high-power observing.\u003c\/p\u003e\n\u003cp\u003eThis makes the 5mm T6 an excellent choice for a \"grab-and-go\" kit. It provides the performance of a much larger eyepiece in a package that doesn't demand a heavy-duty mount or extensive counterweighting. It is a limitation, however, that the compact size contributes to its shorter eye relief compared to larger eyepieces like the Delos series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eObserving with the Nagler T6 5mm\u003c\/h3\u003e\n\u003cp\u003eOn a night of steady seeing, place the 5mm Nagler T6 in a quality 8-inch Schmidt-Cassegrain telescope for a magnification of 406x. Center on Saturn. The planet and its rings fill a pleasing portion of the 82° field, leaving ample black space around them. As your eye settles, the Cassini Division snaps into focus as a sharp, dark line tracing the ansae.\u003c\/p\u003e\n\u003cp\u003eYou can hold the view for long stretches, watching the subtle banding on the planet's globe without the need to nudge the telescope constantly. The wide field makes tracking effortless, even on a manual mount. This is where the Nagler design proves its worth, combining high-power planetary reach with the comfort of a wide-field view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Your High-Power Nagler\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T6 series offers several high-power options. The 5mm is often the right choice when you need a significant step up in magnification for planetary viewing or splitting tight double stars.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler T6 7mm:\u003c\/strong\u003e The 7mm is an excellent all-around high-power eyepiece, but the 5mm provides a 40% increase in magnification. When seeing conditions are good, the 5mm will reveal finer detail on Jupiter and Saturn that the 7mm may only hint at. The 7mm is more forgiving on nights of average seeing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler T6 3.5mm:\u003c\/strong\u003e The 3.5mm pushes magnification to the limit for most telescopes and atmospheric conditions. The 5mm is a more versatile choice, hitting the sweet spot for high-power observing on more nights of the year. The 3.5mm is a specialist tool for exceptional seeing or for use with shorter focal length telescopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Nagler T6 5mm good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is an exceptional planetary eyepiece. Its 5mm focal length provides high magnification, while the 82° field of view makes it easy to track planets without them quickly drifting out of view, offering a more comfortable and immersive experience.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 5mm Nagler T6 with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 12mm eye relief is generally considered too short for comfortable viewing with glasses. Observers with astigmatism can use this eyepiece without glasses by pairing it with a Tele Vue DIOPTRX corrector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Nagler T6 5mm compare to the 5mm Delos?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 5mm Delos offers a more comfortable 20mm of eye relief and a slightly smaller 72° field of view. The Nagler T6 is smaller, lighter, and provides the iconic 82° \"spacewalk\" experience. If eye relief is your top priority, choose the Delos; if you want the widest possible field in a compact size, choose the Nagler.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this eyepiece work well in my fast f\/4.5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Nagler design is well-corrected for fast telescopes. However, to get the sharpest possible stars across the entire 82° field in a very fast Newtonian, it is best used with a coma corrector like the Tele Vue Paracorr Type 2.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main trade-off with the Nagler T6 design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main trade-off for its compact size and wide 82° field is the modest 12mm of eye relief. This is a deliberate design choice to keep the eyepiece small and light, but it makes it less suitable for eyeglass wearers compared to other Tele Vue lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN6-05.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e5mm\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\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\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eNagler Type 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Elements\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e7.9 oz \/ 224 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e3.2 in \/ 81 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e7.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T6 5mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_6_5mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879254301,"sku":"TV-EN6-05.0","price":533.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T6_5mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t6-3-5mm-82-degree-eyepiece","title":"Tele Vue Nagler T6 3.5mm 82° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 3.5mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 12mm\u003c\/li\u003e\n\u003cli\u003eOptical Design: 7 Elements in 4 Groups (Nagler Type 6)\u003c\/li\u003e\n\u003cli\u003eWeight: 0.53 lbs \/ 241 g\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\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\u003eThe Planetary Powerhouse: Tele Vue Nagler T6 3.5mm Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T6 3.5mm 82° Eyepiece is a specialized high-magnification instrument designed to deliver expansive, sharp views of the solar system's most challenging targets. It leverages the renowned Nagler design to fit a wide 82° apparent field into a compact 1.25\" barrel, providing a \"spacewalk\" experience at magnifications that reveal fine planetary detail, split tight double stars, and resolve globular clusters to their core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eNagler Type 6 Optical Design for High-Power Views\u003c\/h3\u003e\n\u003cp\u003eThe 3.5mm Nagler T6 uses a sophisticated 7-element optical layout to achieve its signature 82° apparent field of view. This design corrects for aberrations like astigmatism and field curvature, which are often pronounced at the high magnifications this eyepiece produces. The result is a sharp, flat field where stars remain pinpoints from the center to the very edge, allowing you to use the entire view with confidence.\u003c\/p\u003e\n\u003cp\u003eUnlike simpler designs that force you to keep targets perfectly centered, the Nagler's correction gives you the freedom to let objects drift across the wide field. This is particularly useful for planetary observing on a Dobsonian mount, as it extends the time between nudges and creates a more comfortable, immersive session. The compact physical size also means it works well in binoviewers or on smaller, balanced telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast-Optimized Coatings for Faint Detail\u003c\/h3\u003e\n\u003cp\u003eEvery air-to-glass surface in the Nagler T6 is fully multi-coated, and the lens edges are blackened to minimize internal reflections. This level of stray light control is critical at high power, where maximizing contrast is the key to seeing subtle features. The high-transmission coatings ensure that the maximum amount of light from the objective reaches your eye, producing a bright, neutral image.\u003c\/p\u003e\n\u003cp\u003eOn a target like Jupiter, this translates to seeing more delicate festoons and swirls within the main cloud belts and better definition in the Great Red Spot. For lunar observers, it means picking out tiny craterlets and rilles along the terminator, where the interplay of light and shadow reveals the finest surface textures. The lack of scattered light creates a clean, dark background that makes faint objects \"pop\" into view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEngineered for High Magnification Comfort\u003c\/h3\u003e\n\u003cp\u003eHigh-power eyepieces are often difficult to look through, but the 3.5mm Nagler T6 is designed for usability. It features 12mm of eye relief, a comfortable distance for observers who do not wear glasses. This fixed eye relief is consistent across the Nagler T6 line, making the transition between different magnifications feel familiar and intuitive.\u003c\/p\u003e\n\u003cp\u003eTo ensure proper eye placement, which is crucial for seeing the full 82° field, the eyepiece includes an adjustable eyeguard. You can raise, lower, and lock the soft rubber eyeguard to the perfect height, which helps block stray light from your surroundings and maintain a steady viewing position. This small ergonomic feature significantly improves comfort during long observing sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Right Tool for Resolving Demanding Targets\u003c\/h3\u003e\n\u003cp\u003eWith its 3.5mm focal length, this eyepiece is built for nights of good atmospheric seeing. In a telescope with a 1000mm focal length, it yields 286x magnification, a power level ideal for resolving the Cassini Division in Saturn's rings or teasing apart the components of the Double-Double star system in Lyra. The wide field of view provides a generous canvas for these objects, making them feel suspended in space rather than cramped in a narrow field.\u003c\/p\u003e\n\u003cp\u003eThe true strength of this eyepiece is revealed when viewing a bright globular cluster like M13. At this magnification, the dense core begins to resolve into a spray of individual stars against a black background. The experience is like flying into the cluster's center, an effect made possible only by the combination of high power and a wide, well-corrected apparent field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eParfocal Design for Seamless Magnification Changes\u003c\/h3\u003e\n\u003cp\u003eThe entire Nagler Type 6 series, from 3.5mm to 13mm, is designed to be nearly parfocal. This means you can switch from the 13mm to the 9mm, and then to the 3.5mm, with little to no refocusing required. This is a significant workflow advantage in the field, as it saves time and preserves your dark adaptation by minimizing interaction with the focuser.\u003c\/p\u003e\n\u003cp\u003eThis feature is a testament to the system-level thinking behind the Tele Vue eyepiece lineup. It encourages you to use your eyepieces as a cohesive set, starting wide to locate a target with a lower-power eyepiece and then stepping up in magnification to study it in detail, all without the distraction of major focus adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eLimitations and Ideal Use Cases for the 3.5mm Nagler T6\u003c\/h3\u003e\n\u003cp\u003eThis is a specialist's eyepiece, not an all-arounder. Its performance is highly dependent on atmospheric conditions. On nights of poor seeing, the high magnification will simply magnify the turbulence, resulting in a blurry, shimmering view. For this reason, it is best paired with lower-power eyepieces to have options for different conditions.\u003c\/p\u003e\n\u003cp\u003eFurthermore, the 12mm of eye relief is not sufficient for observers who need to wear glasses to correct for astigmatism. While Tele Vue's DIOPTRX is an option, those requiring glasses for viewing will be better served by the Delos line, which offers a longer 20mm of eye relief. The Nagler T6 3.5mm is the right choice when atmospheric seeing is steady and you need maximum resolving power on bright, small targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eComparative Perspective: Nagler T6 vs. Other Tele Vue Eyepieces\u003c\/h3\u003e\n\u003cp\u003eChoosing a high-power eyepiece involves trade-offs between field of view, eye relief, and complexity. Here is how the 3.5mm Nagler T6 fits into the Tele Vue family.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Delos 3.5mm:\u003c\/strong\u003e The Delos offers a much longer 20mm of eye relief, making it the clear choice for observers who must wear glasses. However, it has a smaller 72° apparent field of view compared to the Nagler's 82°. The choice is between the more comfortable view of the Delos or the more immersive, \"spacewalk\" field of the Nagler.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler Zoom 3-6mm:\u003c\/strong\u003e The Nagler Zoom provides the convenience of multiple focal lengths in one eyepiece. However, its apparent field of view is only 50°, significantly narrower than the fixed 3.5mm Nagler's 82°. The T6 is for observers who prioritize the expansive field over the flexibility of a zoom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Nagler T6 3.5mm good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is an exceptional choice for planetary viewing on nights of good atmospheric seeing. The high magnification reveals fine details on Jupiter, Saturn, and Mars, while the 82° field provides a comfortable and immersive viewing experience.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Nagler T6 3.5mm with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 12mm of eye relief is generally insufficient for observing with glasses. For a high-power eyepiece that accommodates eyeglasses, consider the Tele Vue Delos line, which offers 20mm of eye relief.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between a Nagler Type 5 and Type 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler Type 6 series was designed to be smaller, lighter, and have more eye relief than the original Type 5 designs of similar focal lengths. Both deliver the signature 82° Nagler field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this eyepiece work well with my f\/5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Nagler design is well-corrected for fast optical systems like f\/5 Dobsonians. It will maintain sharp star images across the entire field of view, even at the edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Barlow lens with this eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most telescopes, the 3.5mm focal length provides very high magnification on its own. A Barlow lens would likely push the magnification beyond what atmospheric conditions or your telescope's optics can support, resulting in a dim, blurry image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 3.5mm Nagler T6 parfocal with other eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is designed to be parfocal with the other eyepieces in the Nagler Type 6 family (13mm, 9mm, 7mm, 5mm). This means you can switch between them with little to no need to refocus your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN6-03.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e3.5mm\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\u003eApparent Field of View (AFOV)\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\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e7 elements in 4 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e4.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.53 lbs \/ 241 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e3.2 in \/ 81.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParfocal\u003c\/td\u003e\n\u003ctd\u003eYes, with Nagler T6 series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T6 3.5mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_6_3.5mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879385373,"sku":"TV-EN6-03.5","price":533.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T6_3.5mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t7-19mm-82-degree-eyepiece","title":"Tele Vue Nagler T7 19mm 82° Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 19mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 2\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 19mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 27.1mm\u003c\/li\u003e\n\u003cli\u003eWeight: 1.28 lbs (20.5 oz)\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eSpacewalk Views with Room for Eyeglasses: The Tele Vue Nagler Type 7 19mm\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler Type 7 19mm delivers the 82° \"spacewalk\" field Naglers are known for, with 19mm of eye relief. Tele Vue designed the Type 7 series to give eyeglass-friendly eye relief without the size and weight of an even wider design, so observers who keep their glasses on can still take in the whole field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Nagler Apparent Field\u003c\/h3\u003e\n\u003cp\u003eAn 82° apparent field is wide enough to reach into your peripheral vision. The edge of the view fades from attention, and the telescope seems to \"disappear,\" which is the effect Al Nagler set out to create. Compared with a 50° eyepiece, an 82° field shows almost three times the area of sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e19mm of Eye Relief and an Adjustable Eyeguard\u003c\/h3\u003e\n\u003cp\u003eLong eye relief is the reason the Type 7 exists. With 19mm of eye relief and an adjustable-height eyeguard, you can set the eyepiece for viewing with glasses on or off. Tele Vue recommends the Type 7 for eyeglass wearers and for observers who correct astigmatism with Tele Vue DIOPTRX lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2\" Barrel\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece uses a 2\" barrel, so plan on a 2\" focuser or diagonal. The larger barrel carries the long-eye-relief optics and the full field stop without vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast by Design\u003c\/h3\u003e\n\u003cp\u003eTele Vue blackens the lens edges, uses anti-reflection threads and fits a rubber eyeguard to keep stray light out of the view. Every Tele Vue eyepiece is visually inspected across its full field on Tele Vue's own flat-field test instruments before it ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Sample View\u003c\/h3\u003e\n\u003cp\u003eIn a 8\" f\/6 Dobsonian (1200mm focal length), the 19mm Type 7 gives about 63x with a true field of roughly 1.29°. That is a comfortable scale for the North America Nebula region and large open clusters, with enough sky around it to keep the view in context.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Among the Naglers\u003c\/h3\u003e\n\u003cp\u003eTele Vue makes four Nagler types to balance different needs. The Type 5 (31mm and 16mm) gives the largest true fields, the Type 6 (13mm to 3.5mm) is the most compact, and the Type 4 22mm and Type 7 series give long eye relief for eyeglass wearers. Choose the Type 7 when you want the full 82° field without taking your glasses off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Nagler Type 7 19mm with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With 19mm of eye relief and an adjustable eyeguard, the Type 7 is one of the Naglers Tele Vue recommends for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes it work with DIOPTRX astigmatism correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Tele Vue recommends the Type 7 series for DIOPTRX users as well as for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat barrel size does it use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 19mm Type 7 uses a 2\" barrel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Type 7 differ from the Type 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBoth have an 82° field. The Type 6 is built for compact size, with 12mm of eye relief; the Type 7 is larger and gives 19mm of eye relief for eyeglass comfort.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr with a fast Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn Newtonian reflectors around f\/5 or faster, a Tele Vue Paracorr Type 2 removes the coma that the mirror itself produces at the edge of the field. Refractors and Schmidt-Cassegrains do not need it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN7-19.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e19mm\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e27.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.28 lbs \/ 20.5 oz \/ 581 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyeguard\u003c\/td\u003e\n\u003ctd\u003eAdjustable height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDIOPTRX Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T7 19mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879418141,"sku":"TV-EN7-19.0","price":1012.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T7_19mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t7-14mm-82-degree-eyepiece","title":"Tele Vue Nagler T7 14mm 82° Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 14mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 2\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 19mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 20.5mm\u003c\/li\u003e\n\u003cli\u003eWeight: 1.23 lbs (19.7 oz)\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\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eSpacewalk Views with Room for Eyeglasses: The Tele Vue Nagler Type 7 14mm\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler Type 7 14mm delivers the 82° \"spacewalk\" field Naglers are known for, with 19mm of eye relief. Tele Vue designed the Type 7 series to give eyeglass-friendly eye relief without the size and weight of an even wider design, so observers who keep their glasses on can still take in the whole field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Nagler Apparent Field\u003c\/h3\u003e\n\u003cp\u003eAn 82° apparent field is wide enough to reach into your peripheral vision. The edge of the view fades from attention, and the telescope seems to \"disappear,\" which is the effect Al Nagler set out to create. Compared with a 50° eyepiece, an 82° field shows almost three times the area of sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e19mm of Eye Relief and an Adjustable Eyeguard\u003c\/h3\u003e\n\u003cp\u003eLong eye relief is the reason the Type 7 exists. With 19mm of eye relief and an adjustable-height eyeguard, you can set the eyepiece for viewing with glasses on or off. Tele Vue recommends the Type 7 for eyeglass wearers and for observers who correct astigmatism with Tele Vue DIOPTRX lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2\" Barrel\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece uses a 2\" barrel, so plan on a 2\" focuser or diagonal. The larger barrel carries the long-eye-relief optics and the full field stop without vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast by Design\u003c\/h3\u003e\n\u003cp\u003eTele Vue blackens the lens edges, uses anti-reflection threads and fits a rubber eyeguard to keep stray light out of the view. Every Tele Vue eyepiece is visually inspected across its full field on Tele Vue's own flat-field test instruments before it ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Sample View\u003c\/h3\u003e\n\u003cp\u003eIn a 10\" f\/5 Dobsonian (1250mm focal length), the 14mm Type 7 gives about 89x with a true field of roughly 0.94°. That is a comfortable scale for globular clusters such as M13, with enough sky around it to keep the view in context.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Among the Naglers\u003c\/h3\u003e\n\u003cp\u003eTele Vue makes four Nagler types to balance different needs. The Type 5 (31mm and 16mm) gives the largest true fields, the Type 6 (13mm to 3.5mm) is the most compact, and the Type 4 22mm and Type 7 series give long eye relief for eyeglass wearers. Choose the Type 7 when you want the full 82° field without taking your glasses off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Nagler Type 7 14mm with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With 19mm of eye relief and an adjustable eyeguard, the Type 7 is one of the Naglers Tele Vue recommends for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes it work with DIOPTRX astigmatism correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Tele Vue recommends the Type 7 series for DIOPTRX users as well as for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat barrel size does it use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 14mm Type 7 uses a 2\" barrel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Type 7 differ from the Type 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBoth have an 82° field. The Type 6 is built for compact size, with 12mm of eye relief; the Type 7 is larger and gives 19mm of eye relief for eyeglass comfort.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr with a fast Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn Newtonian reflectors around f\/5 or faster, a Tele Vue Paracorr Type 2 removes the coma that the mirror itself produces at the edge of the field. Refractors and Schmidt-Cassegrains do not need it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN7-14.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e14mm\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e20.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.23 lbs \/ 19.7 oz \/ 558 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyeguard\u003c\/td\u003e\n\u003ctd\u003eAdjustable height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDIOPTRX Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T7 14mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Top Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Bottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879450909,"sku":"TV-EN7-14.0","price":958.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T7_14mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t7-9mm-82-degree-eyepiece","title":"Tele Vue Nagler T7 9mm 82° Eyepiece - 1.25\"\/2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 9mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\/2\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 19mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 13mm\u003c\/li\u003e\n\u003cli\u003eWeight: 1.21 lbs (19.4 oz)\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\u003eManual\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eSpacewalk Views with Room for Eyeglasses: The Tele Vue Nagler Type 7 9mm\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler Type 7 9mm delivers the 82° \"spacewalk\" field Naglers are known for, with 19mm of eye relief. Tele Vue designed the Type 7 series to give eyeglass-friendly eye relief without the size and weight of an even wider design, so observers who keep their glasses on can still take in the whole field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Nagler Apparent Field\u003c\/h3\u003e\n\u003cp\u003eAn 82° apparent field is wide enough to reach into your peripheral vision. The edge of the view fades from attention, and the telescope seems to \"disappear,\" which is the effect Al Nagler set out to create. Compared with a 50° eyepiece, an 82° field shows almost three times the area of sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e19mm of Eye Relief and an Adjustable Eyeguard\u003c\/h3\u003e\n\u003cp\u003eLong eye relief is the reason the Type 7 exists. With 19mm of eye relief and an adjustable-height eyeguard, you can set the eyepiece for viewing with glasses on or off. Tele Vue recommends the Type 7 for eyeglass wearers and for observers who correct astigmatism with Tele Vue DIOPTRX lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1.25\"\/2\" Barrel\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece has both a 2\" and a 1.25\" barrel, so it fits either size of focuser or diagonal without an adapter. Like other Tele Vue 2\"\/1.25\" models, it also accepts the 2\" Eyepiece Barrel Extension (EBX-2120), which lets you use 2\" filters as well as 1.25\" ones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast by Design\u003c\/h3\u003e\n\u003cp\u003eTele Vue blackens the lens edges, uses anti-reflection threads and fits a rubber eyeguard to keep stray light out of the view. Every Tele Vue eyepiece is visually inspected across its full field on Tele Vue's own flat-field test instruments before it ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Sample View\u003c\/h3\u003e\n\u003cp\u003eIn a 8\" f\/6 Dobsonian (1200mm focal length), the 9mm Type 7 gives about 133x with a true field of roughly 0.62°. That is a comfortable scale for the Ring Nebula and bright planetary nebulae, with enough sky around it to keep the view in context.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Among the Naglers\u003c\/h3\u003e\n\u003cp\u003eTele Vue makes four Nagler types to balance different needs. The Type 5 (31mm and 16mm) gives the largest true fields, the Type 6 (13mm to 3.5mm) is the most compact, and the Type 4 22mm and Type 7 series give long eye relief for eyeglass wearers. Choose the Type 7 when you want the full 82° field without taking your glasses off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Nagler Type 7 9mm with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With 19mm of eye relief and an adjustable eyeguard, the Type 7 is one of the Naglers Tele Vue recommends for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes it work with DIOPTRX astigmatism correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Tele Vue recommends the Type 7 series for DIOPTRX users as well as for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat barrel size does it use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 9mm Type 7 has a 2\" barrel and a 1.25\" barrel, so it fits either size of focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Type 7 differ from the Type 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBoth have an 82° field. The Type 6 is built for compact size, with 12mm of eye relief; the Type 7 is larger and gives 19mm of eye relief for eyeglass comfort.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr with a fast Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn Newtonian reflectors around f\/5 or faster, a Tele Vue Paracorr Type 2 removes the coma that the mirror itself produces at the edge of the field. Refractors and Schmidt-Cassegrains do not need it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN7-09.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e9mm\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\" \u0026amp; 1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.21 lbs \/ 19.4 oz \/ 550 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyeguard\u003c\/td\u003e\n\u003ctd\u003eAdjustable height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDIOPTRX Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T7 9mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_7_9mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879483677,"sku":"TV-EN7-09.0","price":958.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T7_9mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-t7-5-5mm-82-degree-eyepiece","title":"Tele Vue Nagler T7 5.5mm 82° Eyepiece - 1.25\"\/2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 5.5mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 82°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\/2\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 19mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 8.1mm\u003c\/li\u003e\n\u003cli\u003eWeight: 1.29 lbs (20.6 oz)\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\u003eManual\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eSpacewalk Views with Room for Eyeglasses: The Tele Vue Nagler Type 7 5.5mm\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler Type 7 5.5mm delivers the 82° \"spacewalk\" field Naglers are known for, with 19mm of eye relief. Tele Vue designed the Type 7 series to give eyeglass-friendly eye relief without the size and weight of an even wider design, so observers who keep their glasses on can still take in the whole field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Nagler Apparent Field\u003c\/h3\u003e\n\u003cp\u003eAn 82° apparent field is wide enough to reach into your peripheral vision. The edge of the view fades from attention, and the telescope seems to \"disappear,\" which is the effect Al Nagler set out to create. Compared with a 50° eyepiece, an 82° field shows almost three times the area of sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e19mm of Eye Relief and an Adjustable Eyeguard\u003c\/h3\u003e\n\u003cp\u003eLong eye relief is the reason the Type 7 exists. With 19mm of eye relief and an adjustable-height eyeguard, you can set the eyepiece for viewing with glasses on or off. Tele Vue recommends the Type 7 for eyeglass wearers and for observers who correct astigmatism with Tele Vue DIOPTRX lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1.25\"\/2\" Barrel\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece has both a 2\" and a 1.25\" barrel, so it fits either size of focuser or diagonal without an adapter. Like other Tele Vue 2\"\/1.25\" models, it also accepts the 2\" Eyepiece Barrel Extension (EBX-2120), which lets you use 2\" filters as well as 1.25\" ones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContrast by Design\u003c\/h3\u003e\n\u003cp\u003eTele Vue blackens the lens edges, uses anti-reflection threads and fits a rubber eyeguard to keep stray light out of the view. Every Tele Vue eyepiece is visually inspected across its full field on Tele Vue's own flat-field test instruments before it ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Sample View\u003c\/h3\u003e\n\u003cp\u003eIn a refractor or SCT (1000mm focal length), the 5.5mm Type 7 gives about 182x with a true field of roughly 0.46°. That is a comfortable scale for Jupiter, Saturn and close double stars, with enough sky around it to keep the view in context.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Among the Naglers\u003c\/h3\u003e\n\u003cp\u003eTele Vue makes four Nagler types to balance different needs. The Type 5 (31mm and 16mm) gives the largest true fields, the Type 6 (13mm to 3.5mm) is the most compact, and the Type 4 22mm and Type 7 series give long eye relief for eyeglass wearers. Choose the Type 7 when you want the full 82° field without taking your glasses off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Nagler Type 7 5.5mm with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With 19mm of eye relief and an adjustable eyeguard, the Type 7 is one of the Naglers Tele Vue recommends for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes it work with DIOPTRX astigmatism correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Tele Vue recommends the Type 7 series for DIOPTRX users as well as for eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat barrel size does it use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 5.5mm Type 7 has a 2\" barrel and a 1.25\" barrel, so it fits either size of focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Type 7 differ from the Type 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBoth have an 82° field. The Type 6 is built for compact size, with 12mm of eye relief; the Type 7 is larger and gives 19mm of eye relief for eyeglass comfort.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr with a fast Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn Newtonian reflectors around f\/5 or faster, a Tele Vue Paracorr Type 2 removes the coma that the mirror itself produces at the edge of the field. Refractors and Schmidt-Cassegrains do not need it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-EN7-05.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e5.5mm\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\" \u0026amp; 1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e8.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.29 lbs \/ 20.6 oz \/ 584 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyeguard\u003c\/td\u003e\n\u003ctd\u003eAdjustable height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDIOPTRX Compatible\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler T7 5.5mm 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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTop Dust Cap\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\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBottom Dust Cap\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Type_7_5.5mm_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879516445,"sku":"TV-EN7-05.5","price":958.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_T7_5.5mm_Eyepiece_1.jpg?v=1777515026"},{"product_id":"tele-vue-nagler-zoom-3-6mm-82-degree-eyepiece","title":"Tele Vue Nagler Zoom 3-6mm 50° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 3mm to 6mm Zoom\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 50° (Constant)\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 10mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 5.1mm (at 6mm) - 2.6mm (at 3mm)\u003c\/li\u003e\n\u003cli\u003eCoatings: Fully Multi-Coated\u003c\/li\u003e\n\u003cli\u003eWeight: 5.3 oz\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\u003eManual\/Software\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eFour Naglers in One: The Ultimate Planetary Zoom Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler Zoom 3-6mm 50° Eyepiece is a high-performance planetary and high-power observation tool that combines the power of four separate Nagler eyepieces into a single, compact unit. Engineered to hold a constant 50° apparent field and stay in focus across its entire focal range, this eyepiece allows you to precisely match the magnification to atmospheric seeing conditions without ever taking your eye from the target. It is the definitive choice for observers who demand optical consistency and the convenience of instant focal length adjustment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContinuous Zoom with Precision Click-Stops\u003c\/h3\u003e\n\u003cp\u003eThe core of the Nagler Zoom is its seamless focal length adjustment from 6mm down to 3mm. A simple twist of the rubberized barrel moves you through the magnifications, allowing you to fine-tune the view in response to changing atmospheric stability. This means you can start at 6mm for a wider context view, and as moments of steady seeing arrive, you can increase power instantly to catch the finest details on Jupiter's cloud bands or inside a lunar crater.\u003c\/p\u003e\n\u003cp\u003eTo provide repeatability, the zoom mechanism features tactile click-stops at the 3, 4, 5, and 6mm positions. This is invaluable for observers who want to log observations at specific magnifications or for outreach sessions where you want to provide a consistent experience. The mechanism is smooth and precise, holding its position firmly once set.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Constant 50° Apparent Field of View\u003c\/h3\u003e\n\u003cp\u003eUnlike many zoom eyepieces that suffer from a \"tunnel vision\" effect at their highest power, the Nagler Zoom maintains its 50° apparent field of view across the entire range. Al Nagler deliberately limited the field to 50° and the eye relief to 10mm so the design could stay compact with only five elements, while keeping the field and focus constant as you zoom. The practical effect is a more engaging and comfortable viewing experience, especially when tracking objects in a non-driven Dobsonian, as the target takes longer to drift out of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Nagler Optical Engine\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece carries the Nagler name because it delivers the performance associated with it. The complex optical design provides sharp, high-contrast images that are well-corrected for aberrations like chromatic aberration and astigmatism, even in fast f\/ratio telescopes. Stars remain tight points across the field, and planetary details are rendered with high fidelity. The high-index glass and full multi-coatings maximize light throughput, which is critical at the high magnifications this eyepiece produces.\u003c\/p\u003e\n\u003cp\u003eObserving the Moon through the Nagler Zoom demonstrates its optical quality. As you zoom from 6mm to 3mm on the crater Clavius, the central peaks resolve from small bumps into a detailed mountain range. The shadows along the terminator remain pitch-black, with no color fringing, showcasing the contrast and color correction of the design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eErgonomics and Field Use\u003c\/h3\u003e\n\u003cp\u003eThe Nagler Zoom is designed for practical use at the telescope. It features a fold-down rubber eyeguard that helps position your eye correctly to see the full field and blocks stray light from interfering with your view. The 10mm of eye relief is consistent across the zoom range, though it is a tighter specification that requires observers to be close to the lens. This is a deliberate trade-off to achieve the compact size and constant field of view.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" barrel includes a safety undercut groove that engages with the thumbscrew of your diagonal or focuser. This provides a secure connection and helps prevent the eyepiece from accidentally falling when the screw is loosened, protecting your investment. Its lightweight and compact form factor means it will not create significant balance issues, even on smaller telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Right Choice for High-Power Observing\u003c\/h3\u003e\n\u003cp\u003eThe Tele Vue Nagler 3-6mm Zoom is for the observer who prizes efficiency and optical excellence in high-magnification viewing. It excels on nights of variable seeing, where the ability to instantly adapt magnification is a significant advantage. While a set of individual fixed focal length eyepieces might offer slightly more eye relief, they cannot match the convenience and seamless adjustment of the zoom.\u003c\/p\u003e\n\u003cp\u003eThis eyepiece is an ideal partner for any high-quality refractor, Schmidt-Cassegrain, or Dobsonian telescope. It is the tool you reach for to split tight double stars, resolve planetary detail, or get the closest possible view of a small planetary nebula. By consolidating four high-power focal lengths into one, it simplifies your accessory case and maximizes your time observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Nagler 3-6mm Zoom as good as four individual Nagler eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor pure optical performance, it comes very close. While some observers find individual eyepieces to have a slight edge in light transmission or eye relief, the Nagler Zoom's convenience and ability to precisely match magnification to seeing conditions often result in better observed detail. It's a trade-off between ultimate performance and ultimate flexibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the field of view really stay at 50° across the whole zoom range?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, Tele Vue engineered this eyepiece to maintain a constant 50° apparent field of view at every focal length from 3mm to 6mm. This is a key feature that distinguishes it from many other zoom eyepieces where the field of view narrows significantly at higher powers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need to refocus after changing the zoom setting?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler Zoom is nearly parfocal across its range, meaning it requires little to no refocusing when you change magnification. Minor adjustments may be needed depending on your telescope and your eye, but it is designed to hold focus well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 10mm eye relief enough for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 10mm eye relief is considered short and is generally not sufficient for observers who need to wear glasses to correct for astigmatism. For best results, it is recommended to observe without glasses. This eyepiece is compatible with Tele Vue's DIOPTRX correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the best use for the Nagler 3-6mm Zoom?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is primarily a high-power eyepiece for lunar, planetary, and double star observing. Its ability to adjust magnification on the fly makes it perfect for finding the maximum useful power that atmospheric seeing conditions will allow on any given night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Nagler Zoom compare to using a Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler Zoom offers more flexibility than a Barlow. A Barlow lens doubles the magnification of your existing eyepieces, but the zoom provides a continuous range of magnifications. It's a more integrated and convenient solution for adjusting power without swapping multiple pieces of gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eTV-ENZ-0306\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e3mm - 6mm, continuous zoom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e50° (constant)\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\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e5.1mm (at 6mm) to 2.6mm (at 3mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClick Stops\u003c\/td\u003e\n\u003ctd\u003e3, 4, 5, 6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e5.3 oz (0.33 lbs \/ 150 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e3.4\" (86 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cimg class=\"DAV-img-box\" alt=\"Tele Vue Nagler Zoom 3-6mm Eyepiece\" src=\"\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Nagler Zoom 3-6mm 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 class=\"DAV-img-box\" alt=\"Tele Vue 1.25-inch Dust Cap (Top)\" src=\"\"\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 class=\"DAV-img-box\" alt=\"Tele Vue 1.25-inch Dust Cap (Bottom)\" src=\"\"\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\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_3-6mm_Zoom_Eyepiece_Manual.pdf\" target=\"_blank\"\u003e\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\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879581981,"sku":"TV-ENZ-0306","price":682.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Nagler_Zoom_3-6mm_Eyepiece_1.jpg?v=1777515026"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/televue-nagler-82-eyepieces.oembed","provider":"David Astro","version":"1.0","type":"link"}