{"product_id":"tele-vue-delos-12mm-72-degree-eyepiece","title":"Tele Vue Delos 12mm 72° Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFocal Length: 12mm\u003c\/li\u003e\n\u003cli\u003eApparent Field of View: 72°\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 1.25\"\u003c\/li\u003e\n\u003cli\u003eEye Relief: 20mm\u003c\/li\u003e\n\u003cli\u003eField Stop Diameter: 15.1mm\u003c\/li\u003e\n\u003cli\u003eCoatings: Fully Multi-Coated\u003c\/li\u003e\n\u003cli\u003eWeight: 12.8 oz (0.80 lbs)\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\u003eHigh-Contrast Clarity Meets Immersive Comfort in a Planetary Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Delos 12mm 72° Eyepiece is an optical instrument designed to deliver the immersive feel of a wide-field eyepiece with the high-contrast, on-axis performance of a dedicated planetary ocular. It combines a generous 72° apparent field with long eye relief, creating a viewing experience that is both expansive and comfortable for extended sessions at the telescope, whether you wear eyeglasses or not.\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 72° Apparent Field Optical System\u003c\/h3\u003e\n\u003cp\u003eThe Delos optical design achieves a wide 72° apparent field of view while maintaining exceptional control over aberrations. Every glass surface is fully multi-coated, and lens edges are blackened to maximize light throughput and suppress internal reflections. The result is a bright, high-contrast image with a neutral color balance, allowing the natural hues of planets and stars to be observed without artificial tint.\u003c\/p\u003e\n\u003cp\u003eThis level of correction makes the 12mm Delos a versatile performer. On a short focal length refractor, it can frame open clusters like the Pleiades with pinpoint stars across the field. In a large Dobsonian, it provides the magnification needed to resolve fine detail in globular clusters such as M13, where the wide field helps to frame the object against a dark, velvety background.\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 20mm Eye Relief and Adjustable Eyeguard\u003c\/h3\u003e\n\u003cp\u003eA defining feature of the Delos line is its comfortable and consistent 20mm of eye relief across all focal lengths. This is a significant benefit for observers who wear eyeglasses for astigmatism, as it allows you to see the entire 72° field without having to press your glasses against the lens. You can simply leave your glasses on and enjoy the full view.\u003c\/p\u003e\n\u003cp\u003eTo accommodate observers who do not wear glasses, Tele Vue developed an intuitive sliding, locking eyeguard. This mechanism allows you to set the height of the soft rubber eyeguard to the perfect position for your eye, effectively blocking stray light and preventing blackouts. Once set, it stays put, ensuring a comfortable and repeatable viewing position every time you use 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\u003eReady for Dioptrx Astigmatism Correction\u003c\/h3\u003e\n\u003cp\u003eFor observers with astigmatism who prefer not to wear glasses at the eyepiece, the Delos series is fully compatible with the Tele Vue Dioptrx system. The eyeguard housing is specifically designed to accept any Dioptrx corrector, which simply drops into the top of the eyepiece. This allows you to dial in your precise astigmatism correction, ensuring the sharpest possible views without corrective lenses in the way.\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 Flat Field for Sharpness Edge-to-Edge\u003c\/h3\u003e\n\u003cp\u003eThe Delos optical formula is engineered to produce a flat focal plane, a critical performance factor, especially in well-corrected telescopes. This means that if a star is in sharp focus in the center of the field, it remains a tight point of light all the way to the field stop. This characteristic is vital for lunar and planetary observing, where you want to see uniform sharpness across the entire disk of Jupiter or the Moon's terminator.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this level of correction in a compact 1.25\" barrel is weight. The Delos 12mm is a substantial eyepiece, and its mass is a direct consequence of the large, high-index glass elements required to achieve this performance. While it balances well on most telescopes, it is a point of consideration for users with very small, lightweight instruments.\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 with Internal Baffling\u003c\/h3\u003e\n\u003cp\u003eBeyond the lens coatings, the internal mechanics of the Delos are optimized for contrast. All interior surfaces are treated with anti-reflective finishes, and sharp-edged baffles are placed to intercept stray light paths. This attention to detail pays off when observing faint details near bright objects, like trying to spot the Cassini Division in Saturn's rings or resolving faint craterlets on the floor of Plato on the Moon.\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\u003eSecure Fit with the 1.25\" Barrel and Safety Undercut\u003c\/h3\u003e\n\u003cp\u003eThe Delos 12mm uses a standard 1.25\" barrel for broad compatibility with any telescope accepting this format. It features a machined safety undercut, which is a groove that allows the focuser's set screw to securely lock the eyepiece in place. This provides peace of mind, helping to prevent the eyepiece from accidentally slipping out of the focuser if a screw loosens slightly during a cold 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\u003eObserving with the Delos 12mm\u003c\/h3\u003e\n\u003cp\u003eImagine using the 12mm Delos in an 8-inch, f\/10 Schmidt-Cassegrain, yielding about 169x magnification. Centered on Jupiter, the planet's disk is large and sharply defined. As your eye adapts, the main equatorial belts resolve into finer, parallel bands with subtle coloration. The Great Red Spot, when visible, stands out not just as a smudge but as an entity with structure, all while the Galilean moons hang like sharp diamonds in the dark space nearby, perfectly in focus even at the edge of the 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 Mid-Power Tele Vue Eyepiece\u003c\/h3\u003e\n\u003cp\u003eThe Delos 12mm occupies a space between several other Tele Vue families, each with distinct advantages.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Nagler 12mm Type 4:\u003c\/strong\u003e The Nagler offers a wider 82° apparent field, creating a more pronounced \"spacewalk\" effect. However, the Delos provides significantly more eye relief (20mm vs. 12mm), making it the clear choice for observers who wear eyeglasses. The Delos is also often perceived as having slightly higher contrast for planetary viewing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Panoptic 15mm:\u003c\/strong\u003e The 15mm Panoptic has a smaller 68° apparent field and is much lighter than the Delos. It is an excellent choice for a lower-power, grab-and-go eyepiece. You would choose the 12mm Delos when you need more magnification and prefer its longer eye relief and slightly wider, more corrected field.\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 Tele Vue Delos 12mm good for someone with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is an excellent choice. The Delos 12mm features a long 20mm of eye relief, which allows most eyeglass wearers to see the full 72° field of view comfortably without removing their glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Delos 12mm compare to the Nagler 12mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Nagler 12mm has a wider 82° apparent field, but the Delos 12mm offers more eye relief (20mm vs 12mm) and is often considered to have slightly higher contrast, making it a strong performer on planets and the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the Delos adjustable eyeguard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adjustable eyeguard allows you to set the perfect distance between your eye and the eyepiece lens. This helps to see the entire field of view easily and blocks stray light from your surroundings, which improves contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a Tele Vue Delos eyepiece with a Dioptrx astigmatism corrector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, all Delos eyepieces are designed to be fully compatible with the Tele Vue Dioptrx system. The corrector fits directly into the top of the eyepiece, allowing you to observe without your glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Delos 12mm too heavy for a small telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt 12.8 ounces (363 grams), the Delos 12mm is a substantial eyepiece. While it will work with any 1.25\" focuser, it may present a balance challenge on very small, lightweight telescopes. It is always best to check your mount's capacity.\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\u003eModel #\u003c\/td\u003e\n\u003ctd\u003eEDL-12.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e12mm\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\u003e72°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e15.1mm\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\u003e12.8 oz (0.80 lbs \/ 363 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e4.3\" L x 2.0\" W\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 Delos 12mm 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_Delos_12mm_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":51223878730013,"sku":"TV-EDL-12.0","price":613.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Delos_12mm_Eyepiece_1.jpg?v=1777515020","url":"https:\/\/davidastro.com\/fr\/products\/tele-vue-delos-12mm-72-degree-eyepiece","provider":"David Astro","version":"1.0","type":"link"}