{"product_id":"tele-vue-nagler-t7-19mm-82-degree-eyepiece","title":"Tele Vue Nagler T7 19mm 82° Eyepiece - 1.25\"","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: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 12mm\u003c\/li\u003e\n\u003cli\u003eOptical Elements: 7\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\u003eA Spacewalk View of the Deep Sky: The Tele Vue Nagler T7 19mm Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Nagler T7 19mm is an 82° wide-field eyepiece engineered to deliver immersive, high-contrast views of large deep-sky objects. This eyepiece provides a generous swath of sky at a useful medium power, making it a foundational piece for observers who want to frame entire star clusters and nebulae within a single, 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 82° Nagler Apparent Field\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of any Nagler is the 82° apparent field of view. This is the angle of the window you look through, and at 82°, it is wide enough to engage your peripheral vision. The practical effect is that the boundary of the eyepiece seems to vanish, creating the celebrated \"spacewalk\" sensation of being suspended in front of the target.\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 Corrected View from Center to Edge\u003c\/h3\u003e\n\u003cp\u003eAchieving a sharp, flat field across such a wide expanse requires a sophisticated optical design. The Nagler T7 19mm uses a seven-element lens configuration to control aberrations like field curvature and astigmatism. This means that stars resolve into tight points not just in the center, but far out toward the edge of the view, maintaining the integrity of star fields and clusters.\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\u003eMaximizing Contrast and Light Throughput\u003c\/h3\u003e\n\u003cp\u003eEvery air-to-glass surface in the Nagler T7 19mm is fully multi-coated to minimize reflections and maximize light transmission. Tele Vue complements this with blackened lens edges, a critical step that absorbs stray light traveling sideways through the glass. The combination of these two sub-systems produces a tangibly darker background sky, making faint nebulosity and the subtle dust lanes in galaxies stand out more clearly.\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\u003eOwners of fast Newtonian and Dobsonian telescopes (typically f\/5 or faster) will find this eyepiece is an ideal partner for the Tele Vue Paracorr coma corrector. The Nagler optical design is specifically calculated to work with the Paracorr, which corrects the comet-shaped stars inherent at the edge of field in parabolic mirrors. The result is a field of sharp, round stars across the entire 82° view, unlocking the full potential of your instrument.\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\u003eTuning the Eyepiece to Your Eye\u003c\/h3\u003e\n\u003cp\u003eComfort and performance are enhanced by a soft, adjustable rubber eyeguard that can be raised or lowered to provide the ideal eye position and block distracting ambient light. For observers with astigmatism, the top of the eyepiece is threaded to accept the Tele Vue DIOPTRX corrector. This allows you to observe without your glasses, seeing the sharpest possible stars your telescope can deliver.\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\u003eFraming the North America Nebula\u003c\/h3\u003e\n\u003cp\u003eIn a telescope with a focal length around 1200mm, the 19mm Nagler provides about 63x magnification and a true field of over 1.3 degrees. This is the perfect scale to frame the sprawling North America Nebula (NGC 7000). The eyepiece is wide enough to capture the prominent \"Cygnus Wall\" and the dark \"Gulf of Mexico\" dust lane in a single, high-contrast view, turning a familiar object into an immersive landscape.\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 Honest Limitation: Eye Relief\u003c\/h3\u003e\n\u003cp\u003eThe primary trade-off for the Nagler's compact form and incredibly wide, corrected field is its eye relief, which is specified at 12mm. While perfectly comfortable for many observers, those who must wear eyeglasses with thick lenses to correct for significant astigmatism may find it difficult to see the entire 82° field at once. This is a deliberate design choice that prioritizes the immersive view and sharpness over long eye relief.\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 19mm Eyepiece: A Tele Vue Comparison\u003c\/h3\u003e\n\u003cp\u003eTele Vue offers several eyepieces around this focal length, each representing a different set of design priorities. Understanding the trade-offs helps you select the right one for your observing style.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Tele Vue Panoptic 19mm:\u003c\/strong\u003e The 19mm Panoptic offers a still-generous 68° apparent field but with a longer 13mm of eye relief, a lighter build, and a lower price. It's the right choice if you prioritize comfort for eyeglass use or want a more compact wide-field eyepiece, but it does not provide the same \"spacewalk\" immersion as the Nagler.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Tele Vue Ethos 21mm:\u003c\/strong\u003e The 21mm Ethos represents the next step up, with a colossal 100° apparent field. It shows a significantly larger true field of view than the Nagler, but it is a much larger, heavier, and more expensive 2-inch eyepiece. The 19mm Nagler offers a similar immersive experience in a much more compact and affordable 1.25-inch format.\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 T7 19mm good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it provides a sharp view, the 19mm focal length generally yields too low a magnification for detailed planetary observation. Observers typically use much shorter focal length eyepieces (like a 5mm or 7mm Nagler) to achieve the high power needed for planets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a Paracorr for this eyepiece with my SCT or refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Paracorr is designed to correct coma, an aberration specific to fast parabolic mirrors used in Newtonian and Dobsonian telescopes. Schmidt-Cassegrains and refractors do not have coma, so a Paracorr is not needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 12mm eye relief on the Nagler 19mm enough for glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt depends on your glasses and facial structure. 12mm can be tight, and some eyeglass wearers may not be able to see the full 82° field stop. If you have astigmatism, using a Tele Vue DIOPTRX corrector instead of your glasses is the ideal solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between a Nagler Type 7 and a Nagler Type 6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \"Type\" designates a specific optical design within the Nagler family. Type 6 Naglers are all short focal length (2.5mm to 13mm) eyepieces with 7 elements. The Type 7 designation is used for the 14mm, 19mm, and 26mm models, which use a different 7-element design optimized for their respective focal lengths.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich filters work best with the Nagler 19mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts medium magnification makes it an excellent eyepiece for use with nebula filters. A UHC or O-III filter will significantly enhance contrast on emission nebulae like the Lagoon, Trifid, or Veil Nebula when viewed with the 19mm Nagler.\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\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\u003eNumber of Elements\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.55 lbs \/ 249 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e21.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003e1.25\" Standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParacorr Recommended\u003c\/td\u003e\n\u003ctd\u003eYes, for f\/5.5 or faster scopes\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","url":"https:\/\/davidastro.com\/products\/tele-vue-nagler-t7-19mm-82-degree-eyepiece","provider":"David Astro","version":"1.0","type":"link"}