{"title":"Explore Scientific 92° Series Eyepieces","description":"\u003cp\u003eExplore Scientific 92° Series eyepieces provide a 92° apparent field in waterproof, argon-purged housings. The ED models come in 9mm, 14mm, 20mm and 25mm, and the 12mm and 17mm Long Eye Relief versions in 2\" barrels give more room for observers who wear glasses.\u003c\/p\u003e\u003cp\u003eWith a field close to the 100° class, these eyepieces suit deep-sky observers using Dobsonians and fast refractors who want wide star fields and more time with each object before it drifts out of view.\u003c\/p\u003e","products":[{"product_id":"explore-scientific-92-12mm-long-eye-relief-waterproof-eyepiece-2","title":"Explore Scientific 92° 12mm Long Eye Relief Waterproof Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e12mm Focal Length\u003c\/li\u003e\n\u003cli\u003e92° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eLong Eye Relief for Viewing Comfort\u003c\/li\u003e\n\u003cli\u003eArgon-Purged Waterproof 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\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° 12mm Long Eye Relief Waterproof Eyepiece - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 92° 12mm Eyepiece redefines wide-field observing with its hyper-wide 92° apparent field of view. This 12mm ocular fits any 2-inch focuser, providing high power for detailed views of planets and small deep-sky objects.\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 92° Hyper-Wide Apparent Field of View\u003c\/h3\u003e\n\u003cp\u003eWith an apparent field of view of 92°, this eyepiece delivers an immersive, 'spacewalk' experience that makes you feel like you're floating in the cosmos. This expansive view not only makes finding celestial objects easier but also keeps them in the field of view longer in non-driven telescopes like Dobsonians, reducing the need for constant nudging.\u003c\/p\u003e\n\u003cp\u003eThe wide canvas is particularly effective for framing moderately sized objects like the Hercules Cluster (M13) or the Lagoon Nebula (M8) in their entirety. It also aids in the use of averted vision, allowing you to place faint targets on the more sensitive periphery of your retina to tease out subtle details.\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\u003eLong Eye Relief in a 12mm Design\u003c\/h3\u003e\n\u003cp\u003eHigh-power, wide-field eyepieces often come with the trade-off of short, uncomfortable eye relief. Explore Scientific has engineered the 92° 12mm eyepiece with long eye relief, ensuring you can see the entire 92° field comfortably without pressing your eye against the lens. This is a critical feature for eyeglass wearers, who can observe with their glasses on and still take in the full, expansive 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\u003eA 2-Inch Waterproof Eyepiece: Argon-Purged for Longevity\u003c\/h3\u003e\n\u003cp\u003eDesigned for real-world observing conditions, the 92° 12mm eyepiece is fully waterproof. The optical housing is sealed and purged with inert argon gas, which prevents the formation of internal fogging during sudden temperature drops. This process also protects the internal lens coatings from moisture and fungus, ensuring the eyepiece delivers high-contrast views for years.\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 92° vs. 82° Series: The Extra 10 Degrees\u003c\/h3\u003e\n\u003cp\u003eWhile the 82° field of view has long been a standard for \"ultra-wide\" eyepieces, the 92° series pushes that boundary for a more profound sense of immersion. The key difference lies in the observational experience.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e82° Field of View:\u003c\/strong\u003e An 82° eyepiece provides a generous window into space, a significant step up from standard Plössls. It's a workhorse field of view that balances width with optical correction and cost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e92° Field of View:\u003c\/strong\u003e The 92° field is so large that it can fill your eye's peripheral vision, creating the sensation of having no eyepiece at all. This \"spacewalk\" effect is what defines the 92° series, offering a more engaging and captivating view, especially on large, diffuse objects.\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 objects are best for the Explore Scientific 92° 12mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 12mm focal length provides medium-to-high magnification, making it ideal for resolving details in globular clusters like M13, observing planetary nebulae such as the Ring Nebula (M57), and framing smaller galaxies like the Whirlpool Galaxy (M51). In a telescope with a 2000mm focal length, it yields 167x magnification, perfect for planetary observing on nights of good seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 92° field of view on the 12mm eyepiece help with a Dobsonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a manual telescope like a Dobsonian, objects drift across the field of view due to Earth's rotation. The hyper-wide 92° field of the Explore Scientific 12mm eyepiece means an object will take significantly longer to drift from one side to the other compared to a standard eyepiece. This allows for longer, more relaxed observations at high power before you need to reposition the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Explore Scientific 92° 12mm eyepiece with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This eyepiece is specifically designed with \u003cstrong\u003elong eye relief\u003c\/strong\u003e, a feature that allows eyeglass wearers to position their eye at a comfortable distance from the lens and still see the entire 92° apparent field of view. This makes it an excellent choice for observers with astigmatism.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Argon-Purged\" mean for the Explore Scientific 12mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\"Argon-Purged\" means the interior of the eyepiece has been filled with inert argon gas and sealed. This process serves two purposes:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt prevents internal optics from fogging up when moving the eyepiece from a warm house to a cold outdoor environment.\u003c\/li\u003e\n\u003cli\u003eIt protects the delicate lens coatings from long-term degradation due to moisture, ensuring a lifetime of crisp, high-contrast views.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need a coma corrector with the 92° 12mm eyepiece in a fast Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn fast telescopes (f\/5 or lower), hyper-wide eyepieces like the Explore Scientific 92° 12mm will reveal the coma inherent in the telescope's optics, causing stars at the edge of the field to appear elongated. For the sharpest possible views across the entire 92° field, using a high-quality coma corrector is strongly recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the Explore Scientific 92° 12mm eyepiece over a zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile a zoom eyepiece offers convenience, a fixed focal length eyepiece like this 12mm model is optically simpler. This generally results in a wider apparent field of view (92° vs. typically 40°-60° in a zoom), better light transmission, and higher contrast, providing a more immersive and detailed image at its specific magnification.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e92°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003eLong\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproof\u003c\/td\u003e\n\u003ctd\u003eYes, Argon-Purged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257017386\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\"\u003eExplore Scientific 92° 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\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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":44967202259229,"sku":"ES-EPWP9212-01","price":433.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-92-deg-12mm-Long-Eye-Relief-Waterproof-Eyepiece-EPWP9212-01-1__04558.1594240356.1280.1280.jpg?v=1684338774"},{"product_id":"explore-scientific-92-17mm-long-eye-relief-waterproof-eyepiece-2","title":"Explore Scientific 92° 17mm Long Eye Relief Waterproof Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e17mm Focal Length\u003c\/li\u003e\n\u003cli\u003e92° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eLong Eye Relief Design\u003c\/li\u003e\n\u003cli\u003eArgon-Purged Waterproof 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° 17mm Long Eye Relief Waterproof Eyepiece - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 92° 17mm eyepiece delivers a hyper-wide 92° apparent field of view in a rugged, waterproof 2\" barrel. Its 17mm focal length provides the medium-high magnification needed to resolve detail in globular clusters and galaxies, while the vast field makes finding and tracking your targets effortless.\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 92° Window on the Universe at 17mm\u003c\/h3\u003e\n\u003cp\u003eWith an apparent field of view of 92°, this eyepiece creates a true \"spacewalk\" experience, dissolving the boundary between you and the night sky. The 17mm focal length is ideal for resolving individual stars in globular clusters like the Hercules Cluster (M13) or revealing the faint structure in galaxies like the Whirlpool Galaxy (M51).\u003c\/p\u003e\n\u003cp\u003eThis combination of magnification and field width frames celestial objects in a way that narrower designs cannot, providing context and an immersive sense of scale. The generous long eye relief design further enhances comfort during long observing sessions, reducing eye strain as you take in the expansive 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\u003eArgon-Purged for a Lifetime of Dew-Free Views\u003c\/h3\u003e\n\u003cp\u003eUnlike standard eyepieces, the Explore Scientific 92° 17mm is hermetically sealed and purged with inert argon gas. This process makes the eyepiece completely waterproof, preventing internal fogging when moving from a warm environment to cold outdoor temperatures—a common issue that can end an observing session.\u003c\/p\u003e\n\u003cp\u003eThis sealed construction also protects the delicate internal multi-coatings from dust, fungus, and moisture for the life of the eyepiece. You get consistent, high-contrast views every time you observe, without worrying about internal contamination or dew.\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\u003eHow 92° Benefits Non-Driven Scopes\u003c\/h3\u003e\n\u003cp\u003eThe vast 92° field of view is a significant advantage for users of non-driven telescopes like Dobsonians. An object will remain in the field of view for a remarkably long time before your telescope needs to be nudged, allowing for more relaxed, uninterrupted study of faint details.\u003c\/p\u003e\n\u003cp\u003eThis wide expanse of sky also aids in the use of averted vision. When hunting for faint objects like the Veil Nebula (NGC 6960), the extra space around your target makes it easier to look slightly to the side, placing the image on a more light-sensitive part of your retina and revealing details that are invisible to direct vision.\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\u003eES 92° 17mm vs. Tele Vue Nagler 17mm: Field and Durability\u003c\/h3\u003e\n\u003cp\u003eThe Tele Vue Nagler series is a benchmark for sharp-to-the-edge performance. The Explore Scientific 92° 17mm, however, offers two distinct advantages for the field observer.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider Apparent Field:\u003c\/strong\u003e The 92° apparent field of the Explore Scientific is significantly more immersive than the 82° field of the 17mm Nagler Type 4, creating a more dramatic viewing experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof Construction:\u003c\/strong\u003e The argon-purged, sealed design of the ES 92° eyepiece provides a level of environmental protection against internal dew and contaminants that is not a standard feature of the Nagler line.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor observers prioritizing the widest possible view and all-weather durability, the Explore Scientific 92° 17mm presents a compelling choice.\u003c\/p\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 is the main advantage of the Explore Scientific 92° 17mm eyepiece's field of view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of the \u003cstrong\u003e92° apparent field of view\u003c\/strong\u003e is the incredibly immersive, \"spacewalk\" experience it provides. For users of non-driven telescopes like Dobsonians, it also means objects stay in the field of view much longer, requiring less frequent manual adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is an argon-purged eyepiece like the ES 92° 17mm better for field use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn argon-purged and sealed eyepiece is \u003cstrong\u003ecompletely waterproof\u003c\/strong\u003e. This prevents internal optics from fogging up when you take it from a warm house into the cold night air. It also permanently seals out dust, moisture, and fungus, protecting the lens coatings and ensuring high-contrast views for years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the ES 92° 17mm perform on globular clusters like M13 in an 8\" f\/6 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an 8\" f\/6 Dobsonian (1219mm focal length), the 17mm eyepiece yields about 72x magnification. This is an excellent power for viewing the Hercules Cluster (M13), providing enough magnification to resolve its dense core into individual stars while the 92° field frames the cluster beautifully against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 17mm focal length of this ES 92° eyepiece a good choice for the Orion Nebula (M42) in a 10\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 10\" f\/10 SCT (2540mm focal length), this eyepiece provides 149x magnification. This is a relatively high-power view that will not fit the entire Orion Nebula (M42) in the field. However, it is an exceptional choice for examining fine details within the nebula's core, easily resolving the four main stars of the Trapezium (Theta Orionis) and the intricate cloud structures surrounding them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 92° 17mm eyepiece suitable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this eyepiece is designed with \u003cstrong\u003elong eye relief\u003c\/strong\u003e for enhanced viewing comfort. This generally allows observers who wear glasses for astigmatism to see most or all of the 92° field of view without having to remove their glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Explore Scientific 92° 17mm compare to an 82° eyepiece at the same focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ES 92° 17mm provides a noticeably larger and more immersive apparent field than an 82° eyepiece. This creates a more compelling visual experience and allows celestial objects to drift through the field more slowly, which is a significant benefit for observers with manual telescopes.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e17mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e92°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257017379\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\"\u003eExplore Scientific 92° 17mm Eyepiece\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\u003cp\u003eNo manual or software is available for this product.\u003c\/p\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":44967202291997,"sku":"ES-EPWP9217-01","price":517.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-92-deg-17mm-Long-Eye-Relief-Waterproof-Eyepiece-EPWP9217-01-1__97519.1594240356.1280.1280.jpg?v=1684338778"},{"product_id":"explore-scientific-epwp9225ed-01","title":"Explore Scientific 92° ED Series 25mm Waterproof Eyepiece","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e92° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e25mm Focal Length\u003c\/li\u003e\n\u003cli\u003e2\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eExtra-Low Dispersion (ED) Glass\u003c\/li\u003e\n\u003cli\u003eWaterproof and Fog-Proof 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\u003e92° ED Series 25mm Waterproof Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 92° ED Series 25mm Waterproof Eyepiece delivers an ultra-wide, low-magnification viewing experience in a 2-inch barrel format. Its 25mm focal length is designed for sweeping through vast star fields, while the immense 92° apparent field of view creates a genuine \"spacewalk\" immersion that narrower designs cannot replicate.\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 92° Panoramic Window on the Cosmos\u003c\/h3\u003e\n\u003cp\u003eThe 92° apparent field of view fundamentally changes how you observe. Instead of looking through a narrow portal, the view fills your perception, allowing large deep-sky objects to be seen in their entirety. You can frame the full expanse of the Andromeda Galaxy (M31) or trace the intricate dust lanes of the North American Nebula (NGC 7000) without panning your telescope.\u003c\/p\u003e\n\u003cp\u003eThis eyepiece is engineered to serve as a wide-field finder and a primary observing instrument. The low power provided by the 25mm focal length makes it easy to locate targets and appreciate the grand scale of the Milky Way's star clouds.\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\u003eED Glass for High-Contrast, Color-Free Views\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece uses Extra-Low Dispersion (ED) glass to significantly reduce chromatic aberration—the false color fringing seen around bright stars and planetary limbs. By correcting for this distortion, star points remain sharp and white across the field, and subtle color differences in nebulae become more apparent.\u003c\/p\u003e\n\u003cp\u003eThe primary benefit is a dramatic increase in contrast. With chromatic aberration suppressed, the sky background appears darker and the separation between faint objects and the surrounding space is much more distinct, improving the visibility of faint galactic arms and nebulous filaments.\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 Construction for All-Night Observing\u003c\/h3\u003e\n\u003cp\u003eBuilt to withstand challenging field conditions, this eyepiece is fully waterproof. The internal optical chambers are sealed and purged, preventing internal fogging when moving from a warm house to a cool observing site. This also protects the internal lens surfaces from dust and moisture, ensuring long-term optical integrity.\u003c\/p\u003e\n\u003cp\u003eThe design incorporates long eye relief, providing comfortable viewing for extended periods. This is a critical feature for observers who wear eyeglasses, allowing them to see the entire 92° field without having to press their eye against the lens.\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\u003e92° vs. 70° Field: The Immersive Difference\u003c\/h3\u003e\n\u003cp\u003eWhile a 70° eyepiece offers a wide view, a 92° field delivers a qualitatively different experience. The key distinction is the role of the field stop—the black edge of the viewing circle.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e70° Field:\u003c\/strong\u003e You are aware of the field stop. The view feels like a generous window, but it is still clearly a window.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e92° Field:\u003c\/strong\u003e The field stop recedes into your peripheral vision, often disappearing entirely. This creates the sensation of being suspended in space rather than looking through an instrument, which is the ultimate goal of an ultra-wide eyepiece. The trade-off for this immersion is the requirement for a 2\" focuser, which is not standard on all telescopes.\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 makes the Explore Scientific 92° 25mm eyepiece ideal for large deep sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe combination of a long \u003cstrong\u003e25mm focal length\u003c\/strong\u003e (for low magnification) and an enormous \u003cstrong\u003e92° apparent field of view\u003c\/strong\u003e allows you to fit exceptionally large objects like the Andromeda Galaxy (M31) or the Veil Nebula complex into a single frame. This contextual view is impossible to achieve with standard eyepieces at the same magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 92° 25mm eyepiece perform in an 8\" f\/10 SCT on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" f\/10 SCT with a 2032mm focal length, this 25mm eyepiece will yield approximately 81x magnification. The true field of view will be over 1.1°, wide enough to frame not just the core Trapezium stars but also the entire \"wingspan\" of the Orion Nebula (M42) and its neighbor, De Mairan's Nebula (M43), with dark sky around them. The ED glass will ensure the hot, bright stars of the Trapezium are rendered as sharp points without distracting purple halos.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of ED glass in the Explore Scientific 92° 25mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eExtra-Low Dispersion (ED) glass\u003c\/strong\u003e corrects for chromatic aberration. In practical terms, this means you get higher contrast and sharper views. Bright stars will not show false color fringes (like purple halos), and the background sky will appear darker, making it easier to see faint details in galaxies and nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 92° 25mm eyepiece a good choice for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this eyepiece is not designed for high-magnification planetary viewing. Its long 25mm focal length provides low power, which is ideal for deep-sky objects. For observing fine details on Jupiter or the rings of Saturn, a short focal length eyepiece (e.g., 5mm to 9mm) would be a much better choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the long eye relief of this eyepiece suitable for observers who wear glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The long eye relief is a key feature designed for comfort, especially for eyeglass wearers. It allows you to position your eye at a sufficient distance to see the entire vast 92° field of view without removing your glasses, which is critical if you need them to correct for astigmatism.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the \"waterproof\" feature mean for the 92° 25mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBeing waterproof means the eyepiece is internally sealed and purged with an inert gas. This has two major benefits for an observer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Internal Fogging:\u003c\/strong\u003e It won't fog up on the inside during nights with heavy dew.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps Dust Out:\u003c\/strong\u003e The seals prevent dust, pollen, and other contaminants from getting inside the eyepiece and settling on the lens surfaces, ensuring a clean view for years.\u003c\/li\u003e\n\u003c\/ul\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":52909354582301,"sku":"ES-EPWP9225ED-01","price":700.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-92-ED-Series-25mm-Waterproof-Eyepiece-1_a286425f-d806-4d32-98c2-c9651fb00c61.jpg?v=1789061413"},{"product_id":"explore-scientific-epwp9209ed-01","title":"Explore Scientific 92° ED Series 9mm Waterproof Eyepiece","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e9mm 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\u003c\/li\u003e\n\u003cli\u003eWaterproof and 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 9mm Waterproof Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 92° ED Series 9mm Waterproof Eyepiece delivers an ultra-wide 92° apparent field of view in a 9mm focal length, optimized for high-magnification planetary and deep-sky observation. This 2-inch barrel eyepiece is engineered to create a fully immersive, \"spacewalk\" experience, keeping targets in the view longer at high power and reducing the need for constant scope adjustments.\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 92° Spacewalk: High-Power Views in a 9mm Eyepiece\u003c\/h3\u003e\n\u003cp\u003eThe 92° apparent field of view transforms high-power observing from looking through a keyhole into a panoramic experience. At the high magnification provided by the 9mm focal length, this expansive view allows you to frame not just Jupiter, but its Galilean moons in a single, dramatic vista. For smaller deep-sky objects like the Ring Nebula (M57) or the Hercules Cluster (M13), the wide field provides context, making the object feel suspended in a vast, dark 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\u003eED Glass in a 2-Inch Barrel: Maximizing Contrast and Color Fidelity\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece uses Extra-Low Dispersion (ED) glass to virtually eliminate chromatic aberration, or false color fringing. This correction is critical at high magnifications, ensuring fine details on bright objects like the lunar terminator or Saturn's rings resolve with maximum sharpness and contrast. The result is a color-pure image, preserving the subtle hues of Jupiter's cloud bands and the true colors of double stars.\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\u003eHigh-Power Comfort: The 9mm ED's All-Weather Design\u003c\/h3\u003e\n\u003cp\u003eEngineered for demanding field use, this 9mm eyepiece is fully waterproof and gas-purged. This process prevents internal optics from fogging during nights with heavy dew, protecting your investment and ensuring your views remain clear. The design also incorporates long eye relief, providing comfortable viewing during extended sessions and reducing eye strain when studying faint planetary details.\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\u003eES 92° 9mm vs. TV 9mm Nagler: A 92° Field vs. an 82° Benchmark\u003c\/h3\u003e\n\u003cp\u003eThe Tele Vue 9mm Nagler is a long-standing benchmark for high-power, wide-field viewing, known for its sharp optics and compact form factor. The Explore Scientific 92° 9mm eyepiece, however, presents a compelling alternative with distinct advantages.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider Apparent Field:\u003c\/strong\u003e The primary difference is the Explore Scientific's 92° field compared to the Nagler's 82°. This extra 10 degrees creates a noticeably more immersive view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-Weather Construction:\u003c\/strong\u003e The waterproof and gas-purged design of the Explore Scientific eyepiece is a significant practical advantage for observers in humid climates, a feature not standard on the Nagler.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-Offs:\u003c\/strong\u003e To achieve its ultra-wide field, the 92° eyepiece is physically larger than a Nagler. Both eyepieces represent a significant step up from standard Plössl or Kellner designs in both view quality and physical size.\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\"\u003eHow does the Explore Scientific 92° 9mm eyepiece perform on Jupiter with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" f\/10 SCT (2032mm focal length), the 9mm eyepiece yields 226x magnification. This is an ideal power for resolving fine details like the Cassini Division in Saturn's rings and intricate cloud bands on Jupiter. The 92° field of view will comfortably frame the planet and all four Galilean moons simultaneously.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 9mm focal length of this Explore Scientific eyepiece suitable for viewing the Ring Nebula (M57) in a 10\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. A 10\" f\/4.7 Dobsonian (1200mm focal length) would achieve 133x with this 9mm eyepiece. This magnification is high enough to show the central star within M57 on a good night, while the 92° field provides a dark, expansive backdrop that makes the nebula stand out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of the 92° field of view on the Explore Scientific 9mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is the immersive, \"spacewalk\" feeling it creates, which makes observing more engaging. Practically, it keeps objects within the field of view for a longer time, especially on non-driven mounts like Dobsonians, reducing the need to constantly nudge the telescope at high power.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the \"ED\" in the Explore Scientific 92° 9mm eyepiece mean for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eED\u003c\/strong\u003e stands for \u003cstrong\u003eExtra-Low Dispersion\u003c\/strong\u003e glass. For the observer, this means the eyepiece corrects for chromatic aberration (false color). Views of high-contrast targets like the Moon, planets, and bright stars will be sharper, with higher contrast and no distracting purple or yellow color fringing around the edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 92° 9mm eyepiece comfortable for observers who wear glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis eyepiece is designed with long eye relief, which allows you to hold your eye at a comfortable distance from the lens and still see the entire 92° field of view. This makes it significantly more comfortable for eyeglass wearers than eyepieces with short eye relief.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a waterproof eyepiece like the Explore Scientific 92° 9mm useful?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWaterproofing is achieved by sealing the eyepiece and purging the air inside with an inert gas like argon or nitrogen. This prevents moisture, dew, and dust from getting inside the eyepiece barrel. It ensures the internal lens surfaces stay clean and prevents internal fogging on cold or humid nights.\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":52909355761949,"sku":"ES-EPWP9209ED-01","price":630.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-92-ED-Series-9mm-Waterproof-Eyepiece-1_c518bb4d-de4b-42b7-809a-2bc8526ffb07.jpg?v=1789061423"},{"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":630.0,"currency_code":"CAD","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"},{"product_id":"explore-scientific-epwp9220ed-01","title":"Explore Scientific 92° ED Series 20mm Waterproof Eyepiece","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e92° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e20mm Focal Length\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 and Gas-Purged Construction\u003c\/li\u003e\n\u003cli\u003eLong Eye Relief for Viewing Comfort\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 20mm Waterproof Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 92° ED Series 20mm Waterproof Eyepiece combines a massive 92° apparent field of view with a versatile 20mm focal length. This design, housed in a rugged 2-inch barrel, creates a panoramic viewing experience ideal for framing large nebulae and galaxies without sacrificing the magnification needed to resolve their structure.\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 92° Panoramic Window on the Deep Sky\u003c\/h3\u003e\n\u003cp\u003eThe ultra-wide 92° apparent field of view fundamentally changes your connection to the night sky, creating a \"spacewalk\" effect where the eyepiece body seems to disappear. This expansive perspective allows you to frame entire star clusters and large emission nebulae like the North American Nebula (NGC 7000) in a single, immersive view. Objects also drift through the field more slowly, allowing for more relaxed, extended observation without constant adjustments.\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\u003eED Glass: Color-True Views at 20mm\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 20mm eyepiece's optical train is an element of Extra-Low Dispersion (ED) glass. This premium material corrects for chromatic aberration, minimizing the false color fringing often seen on bright stars and lunar limbs in less-corrected designs. The result is a sharper, higher-contrast image with pure color rendition, revealing subtle details in planetary atmospheres and the faint outer arms of galaxies.\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\u003eBuilt for Comfort: A Waterproof 2-Inch Barrel Design\u003c\/h3\u003e\n\u003cp\u003eEngineered for real-world observing conditions, this eyepiece is fully waterproof and argon-purged. This prevents internal fogging during nights with heavy dew and protects the internal coatings from moisture and fungus for long-term durability. The design also features long eye relief, allowing you to see the full 92° field comfortably, even with eyeglasses on, making long nights at the telescope more enjoyable.\u003c\/p\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\"\u003eHow does the 92° field of the 20mm ED eyepiece change the view of large objects like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 92° field provides a panoramic context that most eyepieces cannot. With the \u003cstrong\u003eExplore Scientific 20mm 92° eyepiece\u003c\/strong\u003e, you can frame the entire core and a significant portion of the dust lanes of the Andromeda Galaxy (M31) at once, creating a sense of scale and depth that is impossible in a narrow-field view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 20mm focal length of this 92° eyepiece a good choice for my f\/10 Schmidt-Cassegrain?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. On a typical 8\" f\/10 SCT with a 2000mm focal length, the 20mm eyepiece yields 100x magnification and a 2mm exit pupil. This is a sweet spot for resolving detail in many galaxies and planetary nebulae while the 92° field provides an incredibly wide true field of view for this level of magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"ED Glass\" mean for the 92° 20mm eyepiece's views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eExtra-Low Dispersion (ED) glass\u003c\/strong\u003e is a premium optical glass that significantly reduces chromatic aberration. For you, this means:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper Stars:\u003c\/strong\u003e Stars will appear as tight, color-pure points of light without distracting blue or purple halos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Contrast:\u003c\/strong\u003e By focusing all colors to the same point, contrast is enhanced, making it easier to see faint details on planets and in nebulae.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the waterproof design on the 92° 20mm ED eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe waterproof and argon-purged construction protects your investment. It prevents internal fogging on dewy nights, which can ruin an observing session, and seals the internal optics from dust, moisture, and fungus, ensuring the eyepiece delivers crisp views for years to come.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need my glasses when using the 20mm 92° ED eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis eyepiece features \u003cstrong\u003elong eye relief\u003c\/strong\u003e, which provides a comfortable viewing distance from the top lens. This design specifically accommodates observers who wear glasses, allowing them to see the entire 92° field of view without having to remove their corrective lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose a 20mm 92° eyepiece over a lower-power, narrower-field eyepiece for finding objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile a lower-power eyepiece might offer a slightly wider true field, the \u003cstrong\u003e20mm 92° eyepiece\u003c\/strong\u003e provides a unique combination of a wide, immersive apparent field and enough magnification to make faint fuzzies \"pop\" against the background sky. Many observers find it easier to identify deep-sky objects in the immersive 92° field compared to looking through a narrower \"tunnel-like\" view.\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e92°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eED Glass element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eWaterproof, Argon-Purged\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\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":52909361103133,"sku":"ES-EPWP9220ED-01","price":630.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-92-ED-Series-20mm-Waterproof-Eyepiece-1_98508514-1d9e-43b8-9da3-d6e8ba11f8c7.jpg?v=1789061440"}],"url":"https:\/\/davidastro.com\/collections\/explore-scientific-92-series-eyepieces.oembed","provider":"David Astro","version":"1.0","type":"link"}