{"product_id":"explore-scientific-epwp7265ed-01","title":"Explore Scientific 72° ED Series 6.5mm Waterproof Eyepiece","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e6.5mm Focal Length for High Magnification\u003c\/li\u003e\n\u003cli\u003e72° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eExtra-Low Dispersion (ED) Glass Element\u003c\/li\u003e\n\u003cli\u003eWaterproof and Fogproof 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 72° ED Series 6.5mm Waterproof Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific 72° ED 6.5mm eyepiece delivers high-power views of the Moon and planets through a standard 1.25\" barrel. Its 72° apparent field of view creates an immersive, wide-screen perspective, framing celestial targets with more surrounding sky than conventional 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\u003eHigh-Magnification Planetary Viewing: A 6.5mm Focal Length with ED Correction\u003c\/h3\u003e\n\u003cp\u003eThe 6.5mm focal length is engineered for detailed observation, pushing the magnification of your telescope to resolve fine features on planets, lunar craterlets, and tight double stars. An Extra-Low Dispersion (ED) glass element corrects for chromatic aberration, minimizing the false color fringing that can soften planetary limbs and bright stars. This results in sharper, higher-contrast images with accurate color, making it easier to distinguish subtle cloud bands on Jupiter or the Cassini Division in Saturn's rings. However, like all high-power eyepieces, the best results from the 6.5mm focal length depend on stable atmospheric seeing 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\u003eThe 72° Apparent Field Advantage\u003c\/h3\u003e\n\u003cp\u003eCompared to the restrictive 50-52° field of a standard Plössl eyepiece, the 72° apparent field of view offers a noticeably more expansive window on the sky. This wider perspective creates a \"spacewalk\" sensation, reducing the feeling of looking down a narrow tube. For observers with non-tracking mounts like Dobsonians, this wider true field means your target stays in view longer before needing to be repositioned, allowing for more sustained and relaxed 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\u003eField-Ready Ergonomics in a 1.25\" Waterproof Body\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece is fully waterproofed and internally purged, preventing moisture, dust, or fungus from contaminating the internal optics. This robust construction ensures reliability during dewy nights and makes the eyepiece easy to clean without fear of introducing fluid behind the lenses. The design also incorporates generous eye relief, providing comfortable views for extended periods and allowing eyeglass wearers to see the entire 72° field without having to press their eye to the lens.\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 will the Explore Scientific 72° ED 6.5mm 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 an 8\" f\/10 Schmidt-Cassegrain Telescope, the 6.5mm eyepiece will yield approximately 313x magnification. This is an ideal power for resolving fine details like Jupiter's Great Red Spot, smaller cloud belts, and festoons, provided the atmospheric seeing is steady. The ED glass will be crucial at this magnification for minimizing chromatic aberration and maximizing contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 6.5mm focal length on this 72° eyepiece good for splitting double stars like Albireo?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 6.5mm focal length is excellent for splitting close double stars. While a wide pair like Albireo (Beta Cygni) is easily split at lower powers, this eyepiece will provide the high magnification needed to resolve much tighter pairs. The sharp, high-contrast view from the ED optics will help define the separation between close stellar components.\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 72° 6.5mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit of \u003cstrong\u003eExtra-Low Dispersion (ED) glass\u003c\/strong\u003e is the significant reduction of chromatic aberration, or false color. At high magnifications, bright objects like planets and stars can show distracting purple or blue halos in non-ED eyepieces. The ED element in this eyepiece focuses all colors of light to the same point, resulting in a sharper, higher-contrast image with true-to-life colors.\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 72° ED 6.5mm eyepiece while wearing glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This eyepiece is designed with generous eye relief, which means you can hold your eye at a comfortable distance from the lens and still see the entire 72° field of view. This makes it an excellent choice for observers who need to wear glasses to correct for astigmatism.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 72° field of view on this eyepiece compare to a standard Plössl?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard Plössl eyepiece typically has an apparent field of view around 50-52°. The 72° field of this Explore Scientific eyepiece provides a significantly wider, more immersive viewing experience. In a non-tracking telescope, an object will take about 40% longer to drift across the field of view compared to a 50° Plössl at the same magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"waterproof\" mean for the 72° ED 6.5mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe waterproof designation means the eyepiece has a sealed optical housing that is purged of internal air and filled with an inert gas like nitrogen or argon. This has two key benefits:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt prevents internal fogging when moving from a warm environment to cold night air.\u003c\/li\u003e\n\u003cli\u003eIt protects the internal lens surfaces from dew, rain, and dust, ensuring longevity and making it safe to clean the exterior lenses with cleaning solutions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003e6.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e72°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eContains Extra-Low Dispersion (ED) Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eWaterproof, Gas-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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e72° ED Series 6.5mm Waterproof 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\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":52909344522525,"sku":"ES-EPWP7265ED-01","price":420.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-72-ED-Series-6-5mm-Waterproof-Eyepiece-1_a0ff30a9-8a4a-492e-957b-947cac444ee3.jpg?v=1789061357","url":"https:\/\/davidastro.com\/products\/explore-scientific-epwp7265ed-01","provider":"David Astro","version":"1.0","type":"link"}