{"product_id":"tele-vue-nagler-t7-14mm-82-degree-eyepiece","title":"Tele Vue Nagler T7 14mm 82° Eyepiece - 1.25\"","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: 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 \/ 227g\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\u003eThe Spacewalk View in a Compact Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T7 14mm 82° Eyepiece delivers the celebrated \"spacewalk\" viewing experience in a compact and lightweight 1.25\" format. This eyepiece is engineered for observers who demand an expansive, immersive field of view without the size and weight penalty of larger 2\" eyepieces. It serves as a versatile mid-power option for resolving globular clusters, framing planetary nebulae, and exploring lunar landscapes with 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 82° Nagler Apparent Field\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of this eyepiece is its 82° apparent field of view, a design pioneered by Al Nagler to replicate the immersive perspective of looking through a spacecraft window. This expansive field eliminates the feeling of looking *through* an instrument, instead creating a sense that you are suspended in space. The 14mm focal length provides a useful medium magnification that makes this immersive effect accessible in a wide variety of 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\u003eSeven-Element Optical System with Full Multi-Coatings\u003c\/h3\u003e\n\u003cp\u003eAchieving a sharp, high-contrast 82° field requires a sophisticated optical design. The Nagler T7 14mm uses a seven-element layout that corrects for aberrations like astigmatism and field curvature, ensuring star points remain sharp across the vast majority of the view. Every glass-to-air surface receives Tele Vue's proprietary multi-coatings, which boosts light transmission to over 95% and minimizes reflections for a bright, high-contrast image.\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\u003eInternal Baffling and Blackened Lens Edges\u003c\/h3\u003e\n\u003cp\u003eMaximizing contrast is not just about coatings. This eyepiece incorporates blackened lens edges and internal anti-reflection surfaces to intercept and absorb off-axis stray light. This meticulous internal light control is what produces the Nagler's signature \"black background,\" which makes faint details in nebulae and galaxies stand out more distinctly 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\u003eOptimized for Fast Telescopes with Paracorr\u003c\/h3\u003e\n\u003cp\u003eWhile the Nagler T7 performs well in any high-quality telescope, its design is specifically optimized to work with the Tele Vue Paracorr Type 2 coma corrector. In fast Newtonian reflectors (f\/5 or below), this combination delivers tack-sharp star points from the center of the field right to the edge. This synergy makes it a premier choice for Dobsonian users who want to leverage their large aperture for wide-field deep-sky observation.\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 DIOPTRX Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece features a fold-down rubber eyeguard that helps you maintain the correct 12mm eye relief and blocks stray light from your surroundings. For observers with astigmatism, the top of the eyepiece is threaded to accept Tele Vue's DIOPTRX correctors. This allows you to dial in your exact prescription, enabling you to observe without wearing glasses and still see the entire 82° field with perfect sharpness.\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 View: Resolving M13's Core\u003c\/h3\u003e\n\u003cp\u003eIn a 10-inch f\/5 Dobsonian, the 14mm Nagler provides about 90x magnification, an ideal power for globular clusters. Pointing to the Great Globular Cluster in Hercules, M13, the view is immediately engaging. The cluster doesn't just sit in the field; it fills it, with its outlying stars stretching towards the edges. As your eye settles, the eyepiece's high contrast allows you to resolve countless individual stars deep into the dense core, transforming it from a fuzzy patch into a glittering ball of ancient suns.\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: T7 14mm vs. Other Tele Vue Eyepieces\u003c\/h3\u003e\n\u003cp\u003eThe Nagler T7 14mm occupies a specific niche in the Tele Vue lineup. Its primary trade-off is its modest 12mm eye relief, which can be tight for eyeglass wearers. Understanding the alternatives helps clarify its purpose.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Delos 14mm:\u003c\/strong\u003e The Delos offers a smaller 72° field but provides a much more comfortable 20mm of eye relief, making it the better choice for observers who must wear glasses. The Nagler is chosen when the widest possible field of view is the top priority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler T6 13mm:\u003c\/strong\u003e A very close sibling, the 13mm T6 is even smaller and lighter. The 14mm T7 offers a slightly different magnification step and optical feel that some observers prefer. The choice often comes down to the specific magnification needs of your telescope collection.\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 12mm eye relief on the Nagler 14mm enough for glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most eyeglass wearers, 12mm of eye relief is not enough to see the full 82° field of view. If you need to observe with glasses on, the Tele Vue Delos 14mm with its 20mm of eye relief is a better alternative. The Nagler is best for those who can observe without glasses or use DIOPTRX correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Nagler T7 14mm perform in a fast Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt performs very well, but for optimal edge-of-field sharpness in scopes f\/5 or faster, it is highly recommended to use it with a Tele Vue Paracorr Type 2. The combination is designed to eliminate coma, providing sharp stars across the entire field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between the Nagler T7 and the older Nagler T2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler T7 is a more modern design with improved coatings and better correction for aberrations like chromatic aberration and field curvature compared to much older Nagler versions. It provides a higher contrast and sharper view, especially in high-quality telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this a good eyepiece for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Nagler T7 provides a sharp view, its primary strength is its wide field. For dedicated planetary observation, an eyepiece with simpler optics and a narrower field, like a Tele Vue Plössl or Delos, will often provide slightly higher contrast on subtle planetary details. However, the Nagler is excellent for viewing planets within a wider starfield context.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat filter should I use with the Nagler 14mm for nebulae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 1.25\" barrel is threaded for standard filters. For emission nebulae like the Orion Nebula or Lagoon Nebula, a good quality UHC (Ultra High Contrast) or OIII (Oxygen-III) filter will dramatically increase contrast and reveal fainter structures.\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\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\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\u003e19.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.50 lbs \/ 227g\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","url":"https:\/\/davidastro.com\/products\/tele-vue-nagler-t7-14mm-82-degree-eyepiece","provider":"David Astro","version":"1.0","type":"link"}