{"product_id":"explore-scientific-01-14240","title":"Explore Scientific BT 82mm ED Giant Binocular","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDual 82mm Extra-Low Dispersion (ED) Objective Lenses\u003c\/li\u003e\n\u003cli\u003eReduces Chromatic Aberration for Color-True Images\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 1.25\" Interchangeable Eyepieces\u003c\/li\u003e\n\u003cli\u003eIncludes Two Explore Scientific 62° 20mm Waterproof Eyepieces\u003c\/li\u003e\n\u003cli\u003eDesigned for Astronomical and Terrestrial Viewing\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 BT 82mm ED Giant Binocular\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific BT 82mm ED Giant Binocular uses dual 82mm Extra-Low Dispersion (ED) objective lenses to deliver high-contrast, color-pure views free of chromatic aberration. These binoculars come ready for observation with a pair of included 20mm eyepieces that provide a wide 62° apparent field of view, creating an immersive, two-eyed perspective on the cosmos and distant landscapes.\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\u003e82mm ED Objectives: High-Contrast, Color-Pure Views\u003c\/h3\u003e\n\u003cp\u003eThe optical core of the BT 82mm ED is its pair of 82mm air-spaced triplet objectives featuring premium ED glass. This design gathers significant light for bright views of nebulae and galaxies while virtually eliminating chromatic aberration, or \"color fringing.\" When observing the limb of the Moon, bright planets, or high-contrast terrestrial subjects, you see sharp, well-defined edges without the distracting purple or blue halos common in standard achromatic binoculars.\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 Included 20mm 62° Eyepiece Pair\u003c\/h3\u003e\n\u003cp\u003eYour first view is ready out of the box with the included pair of Explore Scientific 62° Series 20mm Waterproof Eyepieces. These eyepieces provide a wide, comfortable field of view perfect for sweeping the Milky Way or taking in broad landscapes. Because the BT 82mm ED uses standard 1.25\" helical focusers, you can easily swap in other eyepiece pairs to change magnification for more detailed views of planetary surfaces or tight 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 Solid Foundation: Mounting the 82mm Binoculars\u003c\/h3\u003e\n\u003cp\u003eDue to their size and power, the BT 82mm ED binoculars are designed exclusively for mount-based observing; they are not intended for handheld use. A stable platform is essential to achieving the steady, high-resolution views these optics are capable of producing. Pairing them with a dedicated U-mount and tripod (sold separately) allows for smooth, comfortable scanning across the sky at any angle from the horizon to the zenith.\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\u003eBT 82mm ED vs. Standard Achromatic Binoculars: The ED Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile standard achromatic binoculars offer a great entry into two-eyed astronomy, the ED glass in the BT 82mm ED provides a distinct visual upgrade. The difference is most apparent on high-contrast targets where optical precision is critical.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Achromat:\u003c\/strong\u003e Bright stars like Vega or Sirius often show a noticeable violet halo, and the edge of the Moon can appear soft with a fringe of false color. This lowers overall contrast and obscures fine detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBT 82mm ED:\u003c\/strong\u003e The same targets resolve to sharp, color-pure points of light. Lunar craters and mountains along the terminator snap into focus with crisp definition, revealing a level of detail that false color would otherwise mask.\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 BT 82mm ED model?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is the use of \u003cstrong\u003eExtra-Low Dispersion (ED) glass\u003c\/strong\u003e in the 82mm objective lenses. This specialized glass significantly reduces chromatic aberration, resulting in sharper, higher-contrast, and more color-accurate views compared to standard achromatic binoculars, especially on bright objects like the Moon, planets, and stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the BT 82mm ED Giant Binocular?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese binoculars require a sturdy mount and tripod for stable viewing. They are not designed to be handheld. A \u003cstrong\u003ebinocular U-mount\u003c\/strong\u003e, like the Explore Scientific U-Mount with Tripod, is the ideal solution as it provides smooth motion and allows you to aim the binoculars high into the sky without difficulty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use other eyepieces with the BT 82mm ED binoculars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The BT 82mm ED features standard \u003cstrong\u003e1.25\" helical focusers\u003c\/strong\u003e, allowing you to use any pair of standard 1.25\" astronomical eyepieces. This lets you change the magnification for different targets, from low-power wide-field scanning to high-power views of planets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Moon look through the BT 82mm ED with the included 20mm eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith the included 20mm eyepieces, the Moon will appear incredibly sharp and detailed. The ED glass ensures the bright lunar limb is free of color fringing, providing a stark, high-contrast view. You will be able to resolve individual crater chains, mountain ranges, and subtle rilles with the immersive quality that only a two-eyed view can provide.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the BT 82mm ED binoculars good for viewing deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The dual 82mm objectives gather a great deal of light, making them excellent for deep-sky objects. On the Orion Nebula (M42), you can expect to see the four stars of the Trapezium clearly resolved within the glowing nebulosity, with the binocular view providing a striking sense of depth and structure in the surrounding gas clouds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre these BT 82mm ED binoculars suitable for daytime terrestrial viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, they are outstanding for long-range terrestrial viewing. The superior color correction of the ED glass is a significant advantage in daylight, providing exceptionally crisp, vibrant, and high-contrast images of wildlife, ships at sea, or distant mountain scenery.\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\u003e811803036925\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\"\u003eBT 82mm ED Giant Binocular\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\"\u003eExplore Scientific 62° 20mm Waterproof Eyepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\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":52909234749725,"sku":"ES-01-14240","price":3299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-BT-82mm-ED-Giant-Binocular-1_37456e21-ef39-4cd7-9ade-ce64db53a79f.jpg?v=1789060834","url":"https:\/\/davidastro.com\/en-us\/products\/explore-scientific-01-14240","provider":"David Astro","version":"1.0","type":"link"}