{"product_id":"explore-scientific-epwp9214ed-01","title":"Explore Scientific 92° ED Series 14mm Waterproof Eyepiece","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e14mm Focal Length\u003c\/li\u003e\n\u003cli\u003e92° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2-inch Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eExtra-Low Dispersion (ED) Glass Element\u003c\/li\u003e\n\u003cli\u003eWaterproof, Gas-Purged Construction\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\u003eExplore Scientific 92° ED Series 14mm Waterproof Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 92° ED Series 14mm Waterproof Eyepiece delivers an exceptionally immersive, ultra-wide viewing experience in a 2-inch barrel format. Its 92° apparent field of view provides a \"spacewalk\" perspective, allowing you to see large swaths of the sky and frame extensive deep-sky objects without panning your 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 92° Apparent Field: A Spacewalk-Like View\u003c\/h3\u003e\n\u003cp\u003eWith a 92° apparent field, this eyepiece renders an image that can fill your entire field of vision, creating the sensation of looking through a spaceship porthole rather than an eyepiece. This ultra-wide perspective is ideal for observing large nebulae like the North American Nebula (NGC 7000) or scanning the dense star fields of the Milky Way, as it keeps the object comfortably framed with a dark sky border.\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\u003e14mm Focal Length with ED Glass: High-Contrast Views\u003c\/h3\u003e\n\u003cp\u003eThe 14mm focal length provides moderate magnification, making it a versatile workhorse for a wide range of celestial targets. An integrated Extra-Low Dispersion (ED) glass element significantly reduces chromatic aberration, or color fringing, which is especially noticeable on bright objects like Jupiter and the lunar limb. This results in sharper, higher-contrast images with more accurate color rendition across the 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\u003eWaterproof, Purged Body in a 2-Inch Format\u003c\/h3\u003e\n\u003cp\u003eDesigned for durability in the field, the eyepiece is fully waterproofed and purged with an inert gas. This prevents internal fogging during nights with high humidity or rapid temperature drops and protects the internal lens surfaces from dust and fungus. The robust 2-inch barrel provides a secure connection to the focuser and is necessary to accommodate the large lens elements required for the ultra-wide 92° 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\u003eExplore Scientific 14mm 92° vs. Tele Vue 13mm Nagler: Field of View and Features\u003c\/h3\u003e\n\u003cp\u003eWhen choosing an ultra-wide eyepiece, a common comparison is with the Tele Vue Nagler series. The 13mm Nagler is a benchmark for edge-of-field sharpness and correction in a compact format.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApparent Field of View:\u003c\/strong\u003e The Tele Vue 13mm Nagler offers an 82° apparent field. The Explore Scientific eyepiece provides a noticeably larger 92° field, increasing the sense of immersion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeatherproofing:\u003c\/strong\u003e The Explore Scientific 92° series is gas-purged and waterproof, a significant advantage for observers in humid climates or those concerned with long-term durability. The Nagler series is not sealed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEye Relief:\u003c\/strong\u003e Both eyepieces have similar eye relief, though the longer eye relief of the Explore Scientific design may be more comfortable for some observers during extended sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Size:\u003c\/strong\u003e The Explore Scientific 14mm uses a 2-inch barrel exclusively, while the 13mm Nagler is a dual-format 1.25\"\/2\" design, offering more flexibility for different focusers.\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\"\u003eWhat kind of objects is the Explore Scientific 14mm 92° eyepiece best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis eyepiece excels at observing large deep-sky objects where a wide, immersive field is beneficial. It's ideal for open star clusters like the Pleiades (M45), large emission nebulae like the Orion Nebula (M42), and for scanning the star clouds of Sagittarius in the Milky Way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 14mm 92° eyepiece perform in my 8-inch f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" f\/10 Schmidt-Cassegrain with a 2032mm focal length, the 14mm eyepiece will provide 145x magnification. This is an excellent medium-high power for resolving detail in globular clusters like the Hercules Cluster (M13) and viewing planetary nebulae, all while enjoying the expansive 92° field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 14mm 92° eyepiece good for fast telescopes like an f\/4.5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUltra-wide eyepieces can be demanding on fast optical systems. While the Explore Scientific 92° series is well-corrected, you may notice some astigmatism or coma at the very edges of the field in telescopes faster than f\/5. Using a coma corrector with a fast Newtonian is highly recommended to get the best performance across the full 92° field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"waterproof and purged\" mean for the 14mm 92° eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eyepiece barrel is sealed with O-rings and filled with an inert gas (like argon or nitrogen). This has two main benefits:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt prevents moisture from getting inside the eyepiece on dewy nights, stopping internal fogging.\u003c\/li\u003e\n\u003cli\u003eIt keeps dust, pollen, and fungus from contaminating the internal lens surfaces over the life of the eyepiece.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does this eyepiece only come in a 2-inch barrel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo achieve a 92° apparent field of view at a 14mm focal length, the lenses must be very large. A standard 1.25-inch barrel is physically too small to accommodate the required lens diameter without severe vignetting (cutting off the light path), so a 2-inch barrel is necessary.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the long eye relief on the Explore Scientific 14mm 92° help with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the long eye relief is designed to provide a more comfortable viewing experience, especially for observers who wear glasses to correct for astigmatism. You should be able to see a significant portion of the wide field of view with your glasses on, though seeing the absolute edge may still require careful eye placement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909357826333,"sku":"ES-EPWP9214ED-01","price":449.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-92-ED-Series-14mm-Waterproof-Eyepiece-1_8aca00c4-046a-459a-a59a-7371285e1a80.jpg?v=1789061431","url":"https:\/\/davidastro.com\/en-us\/products\/explore-scientific-epwp9214ed-01","provider":"David Astro","version":"1.0","type":"link"}