{"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: 0.45 lbs \/ 204 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\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\u003e0.45 lbs \/ 204 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop\u003c\/td\u003e\n\u003ctd\u003e9.8mm\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\/div\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","url":"https:\/\/davidastro.com\/products\/tele-vue-nagler-t6-7mm-82-degree-eyepiece","provider":"David Astro","version":"1.0","type":"link"}