{"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: 0.45 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\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\u003e0.45 lbs (204 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","url":"https:\/\/davidastro.com\/products\/tele-vue-nagler-t6-9mm-82-degree-eyepiece","provider":"David Astro","version":"1.0","type":"link"}