{"title":"Explore Scientific 82° Series Eyepieces","description":"\u003cp\u003eExplore Scientific 82° Series eyepieces offer an 82° apparent field in waterproof, argon-purged housings. The 1.25\" models include 11mm and 14mm, plus 4.5mm, 6.5mm and 8.5mm LER versions with long eye relief for comfortable high-power viewing. The 18mm, 24mm and 30mm use 2\" barrels.\u003c\/p\u003e\u003cp\u003eThe wide field keeps objects in view longer on non-tracking telescopes such as Dobsonians, and suits observers who want a spacious view of clusters, nebulae and the Moon.\u003c\/p\u003e","products":[{"product_id":"explore-scientific-82-11mm-waterproof-eyepiece-1-25","title":"Explore Scientific 82° 11mm Waterproof Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e11mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eWaterproof \u0026amp; Argon-Purged Construction\u003c\/li\u003e\n\u003cli\u003eEnhanced Multilayer Deposition (EMD) Coatings\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 82° 11mm Waterproof Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 11mm Waterproof Eyepiece delivers medium-high magnification in a standard 1.25\" barrel, combining a vast apparent field with rugged, all-weather construction. Its 82° field of view creates a \"spacewalk\" experience, presenting a view so wide that the eyepiece body effectively disappears, allowing you to scan detailed targets without constantly nudging 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 82° Field: An Immersive, High-Contrast View\u003c\/h3\u003e\n\u003cp\u003eUsing a combination of low-dispersion and high-refractive-index glasses, this eyepiece is optimized for a high-contrast, flat field of view. Explore Scientific's EMD (Enhanced Multilayer Deposition) coatings maximize light transmission and minimize internal reflections, producing bright images with dark sky backgrounds.\u003c\/p\u003e\n\u003cp\u003eThe visual effect of the 82° apparent field is total immersion. Your eye relaxes, making it easier to hold faint details in view for longer periods. To preserve contrast, all internal barrel surfaces are flat black and lens edges are blackened to eliminate stray light from scattering within the optical path.\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 11mm Focal Length: All-Weather Views of Clusters and Nebulae\u003c\/h3\u003e\n\u003cp\u003eWith its 11mm focal length, this eyepiece provides the magnification needed to resolve individual stars in globular clusters like the Hercules Cluster (M13) or reveal structure in compact planetary nebulae like the Ring Nebula (M57). The argon-purged, waterproof design makes it exceptionally reliable for field use, preventing internal fogging during nights with heavy dew and protecting the coatings from moisture and fungus over the long term.\u003c\/p\u003e\n\u003cp\u003eThis magnification is also ideal for studying the bright core of comets or for initial, lower-power views of planets. When paired with Explore Scientific's focal extenders, you can increase magnification by 2x, 3x, or 5x while maintaining the eyepiece's generous eye relief and immersive 82° 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\u003e82° vs. 52° Eyepieces: The Advantage of Averted Vision\u003c\/h3\u003e\n\u003cp\u003eCompared to a standard Plössl with a 52° field, the 82° field of view offers a fundamentally different observing experience. While a Plössl presents a sharp but constrained \"porthole\" view, the 82° design lets an object drift across a much wider field, allowing for more patient study without constant adjustments to the telescope's position.\u003c\/p\u003e\n\u003cp\u003eThis expansive view is a significant advantage when observing faint objects. It allows you to use averted vision—looking slightly to the side of a target—to place its faint light onto the more sensitive peripheral parts of your retina. The wide field gives you ample dark space to comfortably look \"away\" from the object while still keeping it well within the field of view, making faint details more apparent.\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 makes the Explore Scientific 11mm 82° eyepiece \"waterproof\"?\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 purged of air, which is then replaced with an inert gas, \u003cstrong\u003eargon\u003c\/strong\u003e. This process prevents moisture, dust, and fungus from ever entering the optical housing. It also means the eyepiece will not fog up internally when moving from a warm house to a cold, damp observing site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 82° field of the Explore Scientific 11mm eyepiece help with observing faint objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ultra-wide 82° field provides a large, dark background around your target, which is essential for using \u003cstrong\u003eaverted vision\u003c\/strong\u003e. This technique, where you look slightly to the side of an object, makes faint details pop into view. The wide field makes it easy to do this without the object drifting out of sight, a common issue with narrower eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the best targets for the Explore Scientific 11mm 82° eyepiece in an 8\" 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 SCT with a 2032mm focal length, this 11mm eyepiece yields 185x magnification. This is an excellent power for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobular Clusters:\u003c\/strong\u003e Resolving the dense core of M13, M92, and M15.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlanetary Nebulae:\u003c\/strong\u003e Seeing detail and color in the Ring Nebula (M57) and the Dumbbell Nebula (M27).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalaxies:\u003c\/strong\u003e Studying the dust lanes and bright core of the Whirlpool Galaxy (M51) or Bode's Galaxy (M81).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need to rebalance my telescope when using the Explore Scientific 11mm 82° eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePossibly. The Explore Scientific 82° series eyepieces are substantially larger and heavier than standard Plössl or Kellner eyepieces due to their complex optical design and rugged construction. If you are switching from a much lighter 1.25\" eyepiece, you may need to adjust your counterweights or the position of your optical tube to ensure proper balance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use Barlows or focal extenders with the Explore Scientific 11mm 82° eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This eyepiece is designed to work well with focal extenders and high-quality Barlow lenses. Explore Scientific recommends their own Focal Extenders, which are designed to increase magnification without negatively impacting the eyepiece's native eye relief or wide 82° apparent field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Explore Scientific 11mm eyepiece perform on planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 11mm focal length provides a powerful, detailed view of planets. On a night with steady seeing, you can expect to clearly resolve Jupiter's main cloud bands, the Great Red Spot, and the shadows of its moons during a transit. The wide 82° field is particularly enjoyable as it allows you to watch the planet and its four Galilean moons drift across the field in a single, expansive 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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e11mm\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\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eWaterproof, Argon-Purged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Multilayer Deposition (EMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257014606\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\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":44967199441181,"sku":"ES-EPWP8211-01","price":209.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-82-deg-11mm-Waterproof-Eyepiece-EPWP8211-01-1__63911.1594240342.1280.1280.jpg?v=1684338815"},{"product_id":"explore-scientific-82-14mm-waterproof-eyepiece-1-25","title":"Explore Scientific 82° 14mm Waterproof Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e14mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eWaterproof \u0026amp; Argon-Purged Design\u003c\/li\u003e\n\u003cli\u003eEMD (Enhanced Multilayer Deposition) Coatings\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 82° 14mm Waterproof Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 14mm Waterproof Eyepiece delivers a medium-high power view in a standard 1.25\" barrel. Its 14mm focal length is ideal for resolving details in globular star clusters and planetary nebulae. The expansive 82° apparent field of view provides a fully immersive, spacewalk-like experience that makes you feel like you're floating in space.\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 82° Immersive View at 14mm\u003c\/h3\u003e\n\u003cp\u003eWith an 82° apparent field, this eyepiece creates a window into space so wide your eye can relax and take in the entire scene. This full-immersion effect is not just dramatic; it makes it easier to use averted vision to detect faint details in nebulae or the outer arms of galaxies. The 14mm focal length provides the magnification needed to resolve individual stars in globular clusters like the Hercules Cluster (M13) or see structure in the Ring Nebula (M57).\u003c\/p\u003e\n\u003cp\u003eUsing a combination of low-dispersion and high-refractive-index glasses with Enhanced Multilayer Deposition (EMD) coatings, the optical system is optimized for high contrast and resolution. Views are sharp across the field, minimizing the need to re-center objects to see them clearly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 1.25\" Waterproof, Argon-Purged Eyepiece\u003c\/h3\u003e\n\u003cp\u003eDesigned for years of use in the field, this eyepiece is fully waterproof. The optical housing is purged with inert argon gas, which prevents the formation of internal fogging in damp conditions and protects the coatings from moisture, fungus, and dust. This ensures your view stays clear and the eyepiece maintains its integrity, even in challenging observing environments.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Construction:\u003c\/strong\u003e A precision-machined metal barrel ensures the optical elements remain perfectly aligned for consistent, sharp images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximized Contrast:\u003c\/strong\u003e All internal surfaces are blackened, and the lens edges are darkened to absorb stray light, preventing reflections that can wash out faint details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Fit:\u003c\/strong\u003e The 1.25\" barrel fits any standard focuser or diagonal, making it a straightforward upgrade for virtually any telescope.\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 is the main advantage of the Explore Scientific 14mm eyepiece's 82° field of view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 82° apparent field of view creates a fully immersive experience, often described as a \"spacewalk\" view. It allows your eye to relax, making it easier to observe for longer periods and to use techniques like averted vision to spot faint details that might be missed in a narrower field eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the waterproof, argon-purged design benefit the Explore Scientific 82° 14mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis design makes the eyepiece impervious to the elements. \u003cstrong\u003eArgon purging\u003c\/strong\u003e prevents internal fogging during nights with heavy dew and stops dust or fungus from getting inside the optical housing. This ensures long-term durability and consistently clear, high-contrast views, regardless of the observing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat objects are best for the Explore Scientific 14mm 82° eyepiece in 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 Schmidt-Cassegrain Telescope, the 14mm focal length yields approximately 145x magnification. This is an excellent power for:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eResolving individual stars in bright globular clusters like M13 or M5.\u003c\/li\u003e\n\u003cli\u003eViewing planetary nebulae like the Ring Nebula (M57) or the Dumbbell Nebula (M27).\u003c\/li\u003e\n\u003cli\u003eObserving details in the cloud bands of Jupiter and the rings of Saturn.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 14mm 82° eyepiece suitable for a fast Dobsonian telescope like an f\/5?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The advanced optical design of the Explore Scientific 82° series provides good flat-field characteristics, making it a strong choice for fast telescopes like f\/5 or f\/4.7 Dobsonians. It will deliver sharp stars across most of the wide field of view with minimal distortion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the EMD coatings on the Explore Scientific 14mm eyepiece improve the view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEMD (Enhanced Multilayer Deposition) coatings are advanced anti-reflection coatings applied to all optical surfaces. They dramatically increase light transmission and reduce reflections and ghosting. The result is a brighter, higher-contrast image, which is especially critical for observing faint deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the Explore Scientific 82° 14mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 1.25\" barrel is threaded to accept standard 1.25\" astronomy filters, such as nebula filters (UHC, O-III), color filters for planetary observing, or a moon filter.\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\u003e14mm\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\u003eWaterproof\u003c\/td\u003e\n\u003ctd\u003eYes, Argon-Purged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Multilayer Deposition (EMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257014613\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":44967199473949,"sku":"ES-EPWP8214-01","price":209.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-82-deg-14mm-Waterproof-Eyepiece-EPWP8214-01-1__26427.1594240343.1280.1280.jpg?v=1684338818"},{"product_id":"explore-scientific-82-4-5mm-ler-waterproof-eyepiece-1-25","title":"Explore Scientific 82° 4.5mm LER Waterproof Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e4.5mm High-Magnification Focal Length\u003c\/li\u003e\n\u003cli\u003e15.9mm Long Eye Relief (LER)\u003c\/li\u003e\n\u003cli\u003eArgon-Purged Waterproof Construction\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\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 82° 4.5mm LER Waterproof Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 4.5mm LER eyepiece delivers high-magnification views of the Moon and planets with an immersive, ultra-wide 82° apparent field of view. Its long eye relief of 15.9mm ensures comfortable viewing for all observers, including those who wear glasses. Designed for nights of steady seeing, this 4.5mm eyepiece is built to resolve fine details, from Cassini's Division in Saturn's rings to intricate structures within bright nebulae, all within a waterproof, argon-purged housing for all-weather reliability.\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\u003eImmersive 82° Views with High-Contrast EMD Coatings\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece provides an ultra-wide 82° apparent field that creates a \"spacewalk\" sensation, allowing your eye to relax and take in a vast scene. To ensure maximum contrast, the multi-element optical train uses low-dispersion glass with a high refractive index, and every lens is edge-blackened to eliminate internal reflections. Explore Scientific's Enhanced Multi-Layer Deposition (EMD) coatings maximize light transmission, delivering sharp, high-resolution images with crisp definition against a dark sky 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\u003eA 15.9mm Eye Relief for High-Magnification Comfort\u003c\/h3\u003e\n\u003cp\u003eHigh-power observing often requires you to hold your eye steady for long periods. The 4.5mm LER eyepiece is engineered with a generous 15.9mm of eye relief, a critical feature for comfort. This extended relief allows eyeglass wearers to see the entire 82° field of view without removing their glasses and provides a more comfortable, less strenuous viewing position for everyone, preventing eye fatigue during detailed planetary observation.\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 Waterproofing for All-Weather Reliability\u003c\/h3\u003e\n\u003cp\u003eField conditions are unpredictable, but your eyepiece's clarity shouldn't be. Each eyepiece in this series is O-ring sealed and purged with inert argon gas, creating a completely waterproof and internally fog-proof optical housing. This protects the internal EMD coatings from moisture, dust, and fungus, ensuring long-term durability and making the eyepiece easy to clean without fear of contaminants entering the barrel.\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 vs. Mid-Power: The 4.5mm LER in the 82° Series\u003c\/h3\u003e\n\u003cp\u003eThe 4.5mm focal length places this eyepiece firmly in the high-magnification category. It excels at splitting tight binary stars and resolving fine detail on planetary surfaces when atmospheric seeing is stable. In contrast, a longer focal length eyepiece from the same 82° series would provide a wider true field of view at lower power, better for framing large deep-sky objects like the Orion Nebula (M42). The trade-off for the 4.5mm's resolving power is its sensitivity to atmospheric turbulence; it demands steady skies to deliver its best views.\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 kind of viewing comfort does the Explore Scientific 4.5mm LER eyepiece offer for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Explore Scientific 4.5mm LER is designed with \u003cstrong\u003e15.9mm of long eye relief\u003c\/strong\u003e (LER). This allows observers who wear glasses for astigmatism to see the entire, immersive 82° field of view without having to press their eye against the lens, ensuring a comfortable and complete visual experience.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eOn an 8\" f\/10 SCT, what can I see on Jupiter with the Explore Scientific 4.5mm LER?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an 8\" f\/10 Schmidt-Cassegrain Telescope, this 4.5mm eyepiece yields high magnification ideal for planetary detail. On a night of good seeing, you can expect to resolve Jupiter's main cloud belts, the Great Red Spot (if visible), and potentially smaller ovals and festoons within the zones. The four Galilean moons will appear as distinct, sharp disks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the waterproof design of the Explore Scientific 4.5mm LER benefit observers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eargon-purged and O-ring sealed design\u003c\/strong\u003e makes the eyepiece impervious to internal fogging, even in high-humidity conditions. It also prevents dust, dew, or cleaning fluid from entering the optical housing, protecting the delicate multi-coatings and ensuring the eyepiece performs reliably in any weather.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is \"averted vision\" and how does the 82° field of the Explore Scientific 4.5mm LER help with it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAverted vision is the technique of looking slightly to the side of a faint object to place its image on a more light-sensitive part of your retina. The ultra-wide 82° field of view of this eyepiece makes this technique more natural and effective. It provides ample space around the target, allowing you to detect faint details in nebulae or galaxies that are invisible when stared at directly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 4.5mm LER eyepiece good for deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for specific targets. While its high power is not suited for large objects like the Andromeda Galaxy (M31), it is excellent for resolving detail in smaller, brighter deep-sky objects. Use it to split the stars in the Trapezium within the Orion Nebula (M42), examine the structure of planetary nebulae like the Ring Nebula (M57), or resolve individual stars in bright globular clusters like the Hercules Cluster (M13).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the EMD coatings on the Explore Scientific 4.5mm LER eyepiece do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eEnhanced Multi-Layer Deposition (EMD) coatings\u003c\/strong\u003e are advanced anti-reflection layers applied to all optical surfaces. Their purpose is to maximize light transmission and minimize scatter, resulting in brighter images, higher contrast, and better resolution. This is especially critical for discerning subtle color variations on planets or faint details at the edge of visibility.\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\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e811803030213\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e4.5mm\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\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e15.9mm\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\u003eWaterproof\u003c\/td\u003e\n\u003ctd\u003eYes, Argon-Purged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (EMD)\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":44967199572253,"sku":"ES-EPWP8245LE-01","price":209.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-4-5mm-82-deg-Series-LER-Waterproof-Eyepiece-EPWP8245LE-01-EPWP8245LE-01-1__18786.1594240345.1280.1280.jpg?v=1684338826"},{"product_id":"explore-scientific-82-6-5mm-ler-waterproof-eyepiece-1-25","title":"Explore Scientific 82° 6.5mm LER Waterproof Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e6.5mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e16.8mm Long Eye Relief (LER)\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\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 82° 6.5mm LER Waterproof Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 6.5mm LER Waterproof Eyepiece delivers high-magnification views with a generous 16.8mm of eye relief in a standard 1.25\" barrel. Its 6.5mm focal length is engineered for resolving fine planetary detail and splitting tight binary stars, while the immersive 82° apparent field of view provides a wide, comfortable context for the object, eliminating the \"looking through a straw\" feeling of narrower designs.\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 6.5mm Focal Length: High-Power Views with an 82° Field\u003c\/h3\u003e\n\u003cp\u003eWith a 6.5mm focal length, this eyepiece is a specialist for high-power observation. It excels at revealing details on the Moon's surface, the cloud bands of Jupiter, and the rings of Saturn. The trade-off for this high magnification is a greater sensitivity to atmospheric seeing; on nights of excellent stability, this eyepiece can reveal stunning planetary detail and resolve the core structures of bright nebulae and globular clusters.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmersive Views:\u003c\/strong\u003e The ultra-wide 82° apparent field of view creates a spacewalk-like experience, allowing you to use averted vision more effectively to detect faint details that might be missed in a narrower field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Optics:\u003c\/strong\u003e The design uses low-dispersion glass with a high refractive index, with all lenses fully multi-coated with Enhanced Multi-Layer Deposition (EMD) coatings and edge-blackened to maximize contrast and light transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e16.8mm Long Eye Relief: Critical Comfort for Eyeglass Wearers\u003c\/h3\u003e\n\u003cp\u003eA standout feature of this eyepiece is its 16.8mm of eye relief, a critical specification for observers who wear glasses to correct for astigmatism. Unlike many high-power eyepieces that require you to press your eye against the lens, the long eye relief allows you to see the entire 82° field of view comfortably with your glasses on. This relaxed viewing posture reduces eye strain, enabling longer, more detailed observing sessions.\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 \u0026amp; Waterproof: A Sealed Optical System for All Conditions\u003c\/h3\u003e\n\u003cp\u003eExplore Scientific's LER eyepieces are built to withstand the elements. The optical housing is O-ring sealed and purged with inert argon gas, making it completely waterproof. This process prevents internal fogging when moving the eyepiece from a warm environment to cold outdoor temperatures and protects the internal coatings from moisture, fungus, and dust for the life of the eyepiece. This robust construction also makes cleaning the external surfaces simple and safe.\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 Focal Length: The 6.5mm in the 82° LER Series\u003c\/h3\u003e\n\u003cp\u003eSelecting the right high-power eyepiece depends on your telescope and typical seeing conditions. Within the Explore Scientific 82° series, the 6.5mm model occupies a versatile sweet spot.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Power:\u003c\/strong\u003e Compared to an 11mm or 14mm eyepiece in the series, the 6.5mm provides significantly more magnification, making it the superior choice for planetary observing and resolving close double stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeeing-Dependent:\u003c\/strong\u003e A shorter focal length, like a 4.7mm, would offer even higher magnification but would be usable on far fewer nights due to atmospheric turbulence. The 6.5mm provides a powerful view that remains practical under average-to-good seeing conditions for most locations.\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 6.5mm LER eyepiece perform on Jupiter with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn an 8\" f\/10 SCT, the 6.5mm eyepiece yields approximately 313x magnification. This is an excellent power for observing Jupiter's cloud bands, the Great Red Spot, and shadow transits of its moons, provided the atmospheric seeing is stable. The 82° field will comfortably frame the planet and all four Galilean moons.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 16.8mm eye relief on the Explore Scientific 6.5mm eyepiece enough for viewing with glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With \u003cstrong\u003e16.8mm of long eye relief\u003c\/strong\u003e, this eyepiece is specifically designed for comfort, especially for eyeglass wearers. You should be able to see the entire 82° field of view without needing to remove your glasses, which is essential if you have 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 82° 6.5mm 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 with O-rings. This makes the eyepiece \u003cstrong\u003efully waterproof\u003c\/strong\u003e and prevents internal optics from fogging up in cold or humid weather. It also protects the delicate internal coatings from dust and moisture over the long term.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 6.5mm focal length be too much magnification for my 6\" f\/5 Newtonian when viewing the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA 6\" f\/5 Newtonian has a focal length of about 762mm, so the 6.5mm eyepiece would provide around 117x magnification. While this is excellent for resolving the Trapezium cluster at the heart of the Orion Nebula (M42), it will be too powerful to fit the entire nebula in the field of view. For a full view of M42, a lower-power eyepiece (24mm or longer) would be more suitable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 82° field of view on the 6.5mm eyepiece compared to a standard Plössl?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard Plössl eyepiece has an apparent field of view around 50°-52°. The \u003cstrong\u003e82° field\u003c\/strong\u003e of the Explore Scientific eyepiece provides a much wider, more immersive window onto the sky at the same magnification. This makes objects feel less constrained and allows you to more easily use averted vision to spot faint details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I clean the Explore Scientific 6.5mm waterproof eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBecause the eyepiece is internally sealed, you only need to clean the outer lens surfaces. First, use a blower bulb to remove any loose dust or grit. Then, if needed, apply a few drops of a quality lens cleaning solution to a microfiber cloth and gently wipe the lens in a circular motion from the center to the edge.\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\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e8118030302208\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":44967199670557,"sku":"ES-EPWP8265LE-01","price":209.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-6-5mm-82-deg-Series-LER-Waterproof-Eyepiece-EPWP8265LE-01-EPWP8265LE-01-1__47841.1594240345.1280.1280.jpg?v=1684338829"},{"product_id":"explore-scientific-82-8-5mm-ler-waterproof-eyepiece-1-25","title":"Explore Scientific 82° 8.5mm LER Waterproof Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e8.5mm Focal Length for High Magnification\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e15mm Long Eye Relief (LER)\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\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 82° 8.5mm LER Waterproof Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 8.5mm LER Waterproof Eyepiece delivers high-magnification views with an expansive 82° apparent field of view. Its 8.5mm focal length is ideal for resolving fine detail on planets and tight binary stars, while the generous 15mm of eye relief ensures the entire immersive view is accessible, even with eyeglasses. Housed in a rugged, argon-purged 1.25\" barrel, this eyepiece is sealed against the elements for consistent, fog-free observing in any conditions.\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-Magnification 8.5mm Focal Length and 82° Field\u003c\/h3\u003e\n\u003cp\u003eThe 8.5mm focal length produces high power in most telescopes, perfect for nights of steady seeing when you want to examine the cloud bands of Jupiter, the Cassini Division in Saturn's rings, or the craters of the Moon. Unlike traditional high-power designs, the ultra-wide 82° apparent field creates a \"spacewalk\" sensation, making the view feel boundless and making it easier to track targets as they drift.\u003c\/p\u003e\n\u003cp\u003eThis broad field of view also enhances the use of averted vision, a technique critical for detecting faint details. By looking slightly to the side of an object like the core of the Orion Nebula (M42), you place the image on a more light-sensitive part of your eye, allowing subtle structures to materialize that are invisible with 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\u003e15mm of Long Eye Relief for Viewing Comfort\u003c\/h3\u003e\n\u003cp\u003eMany high-power eyepieces suffer from short eye relief, forcing you to press your eye against the lens to see the full field—an impossible task for eyeglass wearers. The Explore Scientific 8.5mm LER eyepiece solves this with a comfortable 15mm of eye relief, allowing you to hold your head at a relaxed distance and see the entire 82° field, with or without glasses.\u003c\/p\u003e\n\u003cp\u003eThis focus on comfort is not a luxury; it's a critical component of serious observation. When your eye is relaxed, you can observe for longer periods without fatigue, giving you more time to pick out faint planetary details or resolve close 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\u003eA 1.25\" Argon-Purged Barrel with EMD Coatings\u003c\/h3\u003e\n\u003cp\u003eBuilt to withstand real-world observing conditions, every eyepiece in the Explore Scientific 82° Series is housed in a sealed, O-ring-lined 1.25\" barrel that is purged with inert argon gas. This process makes the eyepiece completely waterproof, preventing internal fogging on dewy nights and protecting the optics from dust, pollen, and fungus for a lifetime of use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMD Coatings:\u003c\/strong\u003e Fully multi-coated with Enhanced Multilayer Deposition (EMD) coatings, the optics maximize light transmission for brighter images and higher contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge-Blackened Optics:\u003c\/strong\u003e The edges of each lens are blackened to minimize internal reflections and stray light, ensuring a dark sky background and making faint objects pop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Cleaning:\u003c\/strong\u003e The waterproof design means you can confidently clean the eyepiece without fear of moisture seeping into the housing, simplifying maintenance.\u003c\/li\u003e\n\u003c\/ul\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 82° 8.5mm vs. a Standard Plössl: The Immersive Difference\u003c\/h3\u003e\n\u003cp\u003eWhile a standard 8.5mm Plössl eyepiece is a functional design, it cannot match the experience delivered by the Explore Scientific 82° LER. A Plössl is often lighter and more affordable, but its optical and ergonomic limitations become clear at high power.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eField of View:\u003c\/strong\u003e The most dramatic difference is the 82° apparent field of the ES eyepiece versus the restrictive ~50° field of a Plössl. The ES 82° shows you a significantly larger, more context-rich patch of sky at the same magnification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEye Relief:\u003c\/strong\u003e A high-power Plössl typically has very short eye relief, making it uncomfortable for long sessions and unusable for most eyeglass wearers. The 15mm of relief on the ES 8.5mm is a substantial ergonomic upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmersion:\u003c\/strong\u003e The combination of the wide field and comfortable eye relief in the ES 82° eyepiece creates an immersive, engaging view that makes you feel like you are floating in space, rather than just looking through a small porthole.\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 is the main advantage of the Explore Scientific 82° 8.5mm eyepiece for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is its \u003cstrong\u003e15mm of long eye relief (LER)\u003c\/strong\u003e. This generous distance allows observers who wear glasses for astigmatism to see the entire, expansive 82° field of view without removing their corrective lenses, which is often impossible with standard high-power eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 82° field of view on the ES 8.5mm eyepiece change the experience of observing planets?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile a planet like Jupiter will appear the same size, the 82° field provides a much wider, darker background of space around it. This creates a more immersive \"spacewalk\" feeling and makes it easier to track the planet's movement across the sky, especially in non-driven telescopes like Dobsonians. It also provides more room to frame the planet with its Galilean moons in a single view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 8.5mm LER eyepiece good for observing deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The 8.5mm focal length provides high magnification that is perfect for resolving fine details within brighter deep-sky objects. On the Orion Nebula (M42), this eyepiece will excel at splitting the four main stars of the Trapezium cluster at its core and revealing the intricate wisps and structures within the surrounding nebulosity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Argon-Purged Waterproof\" mean for the ES 82° 8.5mm eyepiece in practice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn practice, it means the eyepiece is completely sealed from the environment.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt will \u003cstrong\u003enot fog up internally\u003c\/strong\u003e when moving from a warm house to a cold observing site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDust, moisture, and fungus\u003c\/strong\u003e cannot get inside the optical housing, preserving optical quality.\u003c\/li\u003e\n\u003cli\u003eYou can \u003cstrong\u003eclean it thoroughly\u003c\/strong\u003e under running water without risk, making it easy to remove dew or fingerprints.\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 Barlow lens with the Explore Scientific 8.5mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt depends on your telescope's focal length. The 8.5mm eyepiece already provides high magnification on its own. For most Schmidt-Cassegrains or long refractors, this eyepiece will be near the maximum useful power on nights of average seeing. You would only pair it with a Barlow lens on nights of exceptionally steady atmospheric conditions for planetary observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the ES 8.5mm LER eyepiece compare to a standard Plössl of a similar focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Explore Scientific 8.5mm offers a significantly more immersive and comfortable view. Compared to a Plössl, it has a much wider \u003cstrong\u003e82° apparent field of view\u003c\/strong\u003e (vs. ~50°), and substantially longer \u003cstrong\u003e15mm eye relief\u003c\/strong\u003e, making it far superior for eyeglass wearers and for extended observing sessions.\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\u003e8.5mm\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\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e15mm\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\u003eWaterproof\u003c\/td\u003e\n\u003ctd\u003eYes, Argon-Purged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Multilayer Deposition (EMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e811803030237\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 82° 8.5mm LER 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\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":44967199703325,"sku":"ES-EPWP8285LE-01","price":209.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-8-5mm-82-deg-Series-LER-Waterproof-Eyepiece-EPWP8285LE-01-EPWP8285LE-01-1__73330.1594240345.1280.1280.jpg?v=1684338832"},{"product_id":"explore-scientific-82-18mm-waterproof-eyepiece-2","title":"Explore Scientific 82° 18mm Waterproof Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e18mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2\" Diameter Barrel\u003c\/li\u003e\n\u003cli\u003eWaterproof and Argon-Purged Construction\u003c\/li\u003e\n\u003cli\u003eEnhanced Multilayer Deposition (EMD) Coatings\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 82° 18mm Waterproof Eyepiece - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 18mm Waterproof Eyepiece delivers an immersive, medium-power view in any 2-inch focuser, combining a vast apparent field with generous eye relief. Its 18mm focal length is perfectly suited for resolving details in globular star clusters and planetary nebulae, while the expansive 82° field of view creates a \"spacewalk\" experience that frames targets in a rich, contextual starfield.\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 18mm Focal Length: An 82° Window on Globular Clusters\u003c\/h3\u003e\n\u003cp\u003eThe 18mm focal length provides a versatile medium-high magnification, ideal for examining the bright cores of comets, planetary nebulae like the Ring Nebula (M57), and resolving individual stars in globular clusters like the Hercules Cluster (M13). The optical design uses low-dispersion and high-refractive-index glasses with Enhanced Multilayer Deposition (EMD) coatings to produce sharp, high-contrast images across its flat 82° field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 82° Immersion Experience: Long Eye Relief for Relaxed Observing\u003c\/h3\u003e\n\u003cp\u003eAn 82° apparent field of view creates a true full-immersion experience, allowing your eye to relax and take in the entire scene. This wide vista makes it easier to use averted vision—looking slightly to the side of a faint object—to detect subtle details in galactic arms or faint nebulosity. The generous eye relief ensures a comfortable viewing position, even for extended periods at 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\u003eRugged 2-Inch Design: Argon-Purged and Waterproof for Field Use\u003c\/h3\u003e\n\u003cp\u003eBuilt for years of use under the stars, this eyepiece features a completely sealed, waterproof optical housing purged with inert argon gas. This process prevents internal fogging in damp conditions and protects the EMD coatings from fungus and moisture, ensuring pristine views for the life of the eyepiece. All internal surfaces are blackened, and lens edges are darkened to eliminate internal reflections and maximize image contrast.\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 18mm 82° vs. a Standard Plössl Eyepiece\u003c\/h3\u003e\n\u003cp\u003eWhile a standard Plössl eyepiece is a capable and affordable design, the Explore Scientific 82° offers a fundamentally different observing experience. A Plössl's field is typically limited to around 50°, whereas this eyepiece's 82° field reveals a significantly larger patch of sky at the same magnification.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContextual Framing:\u003c\/strong\u003e The wider 82° field allows you to see objects within their larger celestial neighborhood, making star-hopping and target acquisition more intuitive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Contrast:\u003c\/strong\u003e The advanced EMD coatings and superior internal baffling of the Explore Scientific 82° design deliver a darker sky background and higher contrast compared to eyepieces with standard coatings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-Offs:\u003c\/strong\u003e The primary advantages of a Plössl are its smaller size, lighter weight, and lower cost. However, for an immersive, high-contrast view, the 82° design is superior.\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 18mm 82° eyepiece perform on the Orion Nebula (M42) in a 10\" f\/5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 10\" f\/5 Dobsonian (1270mm focal length), the 18mm eyepiece yields 70x magnification. This is an excellent power for framing the entire Orion Nebula (M42) sword region, from the bright Trapezium core to the fainter outer loops of nebulosity, all within the expansive 82° field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 18mm focal length of this Explore Scientific eyepiece a good choice for viewing Jupiter's moons with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. In a typical 8\" f\/10 SCT (2032mm focal length), this eyepiece provides 113x magnification. This is enough power to easily resolve Jupiter's four Galilean moons and see the two main equatorial cloud bands on the planet itself, all with plenty of dark sky around the planet for comfortable viewing.\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 18mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eArgon purging\u003c\/strong\u003e means the air inside the sealed eyepiece barrel has been replaced with inert argon gas. This prevents internal fogging during temperature changes, seals out dust and moisture, and stops the growth of fungus on the internal lens surfaces, ensuring a lifetime of clear views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the Explore Scientific 18mm 82° eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 2-inch barrel of the Explore Scientific 18mm eyepiece is threaded to accept standard 2-inch (M48) astronomy filters, such as light pollution, nebula, or planetary color filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the 82° field of view on the Explore Scientific 18mm eyepiece compared to a standard Plössl?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is the immersive, \"spacewalk\" feeling. An 82° field is significantly wider than the approximate 50° field of a Plössl, showing you much more of the surrounding starfield at the same magnification. This makes finding and framing objects easier and provides a more engaging view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Explore Scientific 18mm eyepiece with a focal extender or Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This eyepiece is fully compatible with 2-inch Barlow lenses and Explore Scientific's own Focal Extenders. Using a 2x extender, for example, would effectively turn this into a 9mm eyepiece, doubling the magnification while maintaining its comfortable eye relief and 82° apparent field.\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\u003e18mm\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\u003e2\"\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\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced Multilayer Deposition (EMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257014620\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 82° 18mm Waterproof Eyepiece - 2\"\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\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":44967199736093,"sku":"ES-EPWP8218-01","price":265.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-82-deg-18mm-Waterproof-Eyepiece-EPWP8218-01-1__78414.1594240346.1280.1280.jpg?v=1684338835"},{"product_id":"explore-scientific-82-24mm-waterproof-eyepiece-2","title":"Explore Scientific 82° 24mm Waterproof Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e24mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eArgon-Purged Waterproof Design\u003c\/li\u003e\n\u003cli\u003eEnhanced Multilayer Deposition (EMD) Coatings\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 82° 24mm Waterproof Eyepiece - 2\"\u003c\/h2\u003e\n\u003cp\u003eWith a 24mm focal length and an 82° apparent field, the Explore Scientific Waterproof Eyepiece frames deep-sky targets in a fully immersive, super-wide view. Its 2-inch barrel format is optimized for high contrast and resolution, making this eyepiece a go-to choice for upper-medium power observation of globular clusters, planetary nebulae, and comets.\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 82° Full-Immersion Field of View\u003c\/h3\u003e\n\u003cp\u003eThe 82° apparent field creates a true \"spacewalk\" viewing sensation, relaxing your eye and allowing you to use averted vision to detect faint details in nebulae and galaxies. Explore Scientific uses a combination of low-dispersion and high-refractive-index glasses with Enhanced Multilayer Deposition (EMD) coatings to deliver high-contrast, high-resolution images across a superior flat field.\u003c\/p\u003e\n\u003cp\u003eWhile the optical design provides generous eye relief, the trade-off for any ultra-wide eyepiece is increased sensitivity to optical train limitations. In very fast telescopes (f\/5 and below), you may notice some edge-of-field aberrations like astigmatism, which is a normal characteristic of wide-field designs at extreme focal ratios.\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 Waterproof Construction for Field Use\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece is built to withstand harsh field conditions. The optical housing is purged of all internal air and filled with inert Argon gas, which prevents internal fogging during sudden temperature drops. This waterproof seal also makes the eyepiece easier to clean, as you can rinse it under running water without fear of moisture ingress damaging the internal coatings.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Barrel:\u003c\/strong\u003e The precision-machined metal lens barrel ensures perfect optical alignment for years of use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStray Light Control:\u003c\/strong\u003e All internal surfaces are flat black, and the lens edges are blackened to eliminate internal reflections and maximize image contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e24mm: An Upper-Medium Power Workhorse\u003c\/h3\u003e\n\u003cp\u003eThe 24mm focal length hits a sweet spot for many telescopes, providing enough magnification to resolve details in smaller deep-sky objects without making the view too dim or narrow. It is an ideal choice for examining the cores of globular clusters like M13, resolving the structure of planetary nebulae such as the Ring Nebula (M57), or studying the bright cloud structures around a comet's nucleus.\u003c\/p\u003e\n\u003cp\u003eFor even higher power, this eyepiece maintains its native 82° apparent field and generous eye relief when paired with Explore Scientific's 2X, 3X, or 5X Focal Extenders. This allows you to effectively triple your magnification options without buying three separate high-power eyepieces.\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 makes the Explore Scientific 82° 24mm eyepiece \"waterproof\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eyepiece is hermetically sealed and \u003cstrong\u003epurged with inert Argon gas\u003c\/strong\u003e. This process removes internal, moisture-containing air and replaces it with a dry gas, preventing internal fogging when moving from a warm house to a cold observing site. The seal also protects the internal lens elements and coatings from moisture, dew, and dust.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 82° field of view on the ES 24mm eyepiece help with observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ultra-wide 82° apparent field of view creates an immersive, \"spacewalk\" feeling that makes observing more comfortable and engaging. This wide expanse makes it easier to use \u003cstrong\u003eaverted vision\u003c\/strong\u003e—looking slightly to the side of a faint object—which places the image on a more light-sensitive part of your retina, helping you see finer, fainter details in objects like galaxies and nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the best objects to observe with the Explore Scientific 24mm 82° eyepiece in an 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 Telescope, this 24mm eyepiece yields about 85x magnification, which is ideal for a wide range of deep-sky objects. It excels at framing moderately sized targets in their entirety, such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGlobular Clusters like the Hercules Cluster (M13) and M5.\u003c\/li\u003e\n\u003cli\u003eBright Planetary Nebulae like the Ring Nebula (M57) and the Dumbbell Nebula (M27).\u003c\/li\u003e\n\u003cli\u003eGalaxies where you want to resolve some core detail, such as Bode's Galaxy (M81).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Explore Scientific 24mm 82° eyepiece for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, while 24mm is generally considered a low-to-medium power for planets, it provides excellent initial views of Jupiter, Saturn, and Mars. For more detailed observation, you can pair it with a high-quality \u003cstrong\u003e2X or 3X Focal Extender\u003c\/strong\u003e or Barlow lens. This setup increases the magnification while preserving the eyepiece's comfortable eye relief and wide field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the view change if I use the Explore Scientific 24mm eyepiece with a 2x Barlow on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWithout a Barlow, the 24mm eyepiece will provide a wide, expansive view of the entire Orion Nebula (M42), including the fainter surrounding nebulosity. Adding a \u003cstrong\u003e2x Barlow\u003c\/strong\u003e will double the magnification, effectively making it a 12mm eyepiece. This will narrow your field of view but allow you to zoom in on the core, easily resolving the four primary stars of the Trapezium (Theta¹ Orionis).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is this Explore Scientific 24mm eyepiece in a 2-inch barrel instead of 1.25-inch?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo achieve a wide 82° apparent field at a 24mm focal length, a larger field stop is required than what can physically fit inside a 1.25-inch barrel. The \u003cstrong\u003e2-inch barrel format\u003c\/strong\u003e is necessary to prevent vignetting (darkening at the edges of the view) and allow the entire, expansive 82° field to be illuminated.\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\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e8122570146376\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore_Scientific_Introduction_Booklet_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\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967199801629,"sku":"ES-EPWP8224-01","price":349.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-82-deg-24mm-Waterproof-Eyepiece-EPWP8224-01-1__66199.1594240346.1280.1280.jpg?v=1684338838"},{"product_id":"explore-scientific-82-30mm-waterproof-eyepiece-2","title":"Explore Scientific 82° 30mm Waterproof Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e30mm Focal Length\u003c\/li\u003e\n\u003cli\u003e82° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eWaterproof and Argon-Purged Construction\u003c\/li\u003e\n\u003cli\u003eEnhanced Multilayer Deposition (EMD) Coatings\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 82° 30mm Waterproof Eyepiece - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 82° 30mm eyepiece delivers an expansive 82° apparent field of view in a rugged, waterproof 2\" barrel. Its 30mm focal length produces low-power, wide-field vistas ideal for framing large deep-sky objects like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31) in their entirety.\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\u003e82° Apparent Field: A Full-Immersion Experience\u003c\/h3\u003e\n\u003cp\u003eThe 82° apparent field creates a true \"spacewalk\" viewing experience, allowing your eye to relax and take in a vast scene. This immersive view makes it easier to use averted vision, a critical technique for detecting faint details in nebulae and galaxies by looking slightly to the side of the object. Explore Scientific uses combinations of low-dispersion and high-refractive-index glasses with Enhanced Multilayer Deposition (EMD) coatings to ensure high contrast, sharp resolution, and a superior flat field from edge to edge.\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\u003e30mm Focal Length for Rich-Field Observing\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece provides a low-magnification, rich-field perspective perfect for sweeping the Milky Way or locating targets. It excels at observing large globular star clusters like the Hercules Cluster (M13), the full extent of planetary nebulae like the Dumbbell Nebula (M27), and the cloud structure around comets. For higher power, it is fully compatible with Explore Scientific's 2X, 3X, or 5X Focal Extenders, which increase magnification while preserving the eyepiece's generous eye relief and immersive 82° 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\u003eArgon-Purged and Waterproof for All-Weather Reliability\u003c\/h3\u003e\n\u003cp\u003eDesigned for years of field use, each 82° Series eyepiece is hermetically sealed and purged with inert argon gas. This process prevents internal fogging during nights with heavy dew and protects the internal coatings from moisture and fungus. The precision-machined metal barrel and flat-blackened internal surfaces minimize reflections and light scatter, ensuring the highest possible image contrast reaches your eye.\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 makes the Explore Scientific 30mm 82° eyepiece \"waterproof\" and \"argon-purged\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eyepiece is hermetically sealed to prevent moisture from entering, making it waterproof. It is then purged with inert argon gas, which displaces internal, moisture-containing air. This dual protection prevents internal fogging in humid conditions and protects the delicate optical coatings from long-term degradation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific 30mm 82° eyepiece good for observing large objects like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is an ideal eyepiece for that purpose. Its 30mm focal length provides low magnification and a very wide true field of view, allowing you to fit the entire 3-degree span of the Andromeda Galaxy (M31) and its satellite galaxies M32 and M110 into a single frame in most amateur telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 30mm eyepiece work well in my fast f\/4 Dobsonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt will work, but there is a trade-off. In an f\/4 telescope, this 30mm eyepiece produces a very large 7.5mm exit pupil. Since most dark-adapted human pupils only dilate to about 7mm, some of the light gathered by your telescope may be lost. You may also notice the shadow of your telescope's secondary mirror in the center of the view, which is more apparent with large exit pupils. It performs optimally in telescopes of f\/5 or slower.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 82° apparent field of this Explore Scientific eyepiece help with observing faint details?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ultra-wide 82° field creates an immersive, comfortable viewing experience that allows your eye to relax. This makes it easier to observe for longer periods and to use \u003cstrong\u003eaverted vision\u003c\/strong\u003e—looking slightly to the side of a faint object. This technique places the image on a more light-sensitive part of your retina, often making faint details in galaxies and nebulae \"pop\" into view.\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 30mm 82° eyepiece with a focal extender or Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This eyepiece is designed to work well with telecentric focal extenders, like the Explore Scientific models. Using a 2X focal extender will effectively turn it into a 15mm eyepiece, doubling the magnification while maintaining the comfortable eye relief and wide 82° apparent field of the original eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of views can I expect with the Explore Scientific 30mm 82° in an 11\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an 11\" f\/10 SCT, this eyepiece provides 93x magnification and a true field of view of about 0.88 degrees, which is perfect for framing larger deep-sky objects. The resulting 3mm exit pupil is excellent for bringing out detail in bright globular clusters like Omega Centauri, resolving the core of the Orion Nebula (M42), and providing context for planetary nebulae like the Ring Nebula (M57).\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\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e8122570146444\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\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967199834397,"sku":"ES-EPWP8230-01","price":419.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-82-deg-30mm-Waterproof-Eyepiece-EPWP8230-01-1__86975.1594240346.1280.1280.jpg?v=1684338841"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/explore-scientific-82-series-eyepieces.oembed","provider":"David Astro","version":"1.0","type":"link"}