{"product_id":"bt-82-sf-large-binoculars-with-62-degree-ler-eyepieces","title":"BT-82 SF Large Binoculars with 62 Degree LER Eyepieces","description":"\u003ch1\u003eBT-82 SF Large Binoculars with 62 Degree LER Eyepieces\u003c\/h1\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e\n  The Explore Scientific BT-82 SF is a premium giant binocular built for serious astronomers and dedicated nature observers who demand the best in optical performance. Featuring 82mm objective lenses and a 480mm focal length, the BT-82 delivers bright, high-contrast views of celestial objects, distant landscapes, and wildlife with stunning clarity. Each eye is served by its own complete optical system, dramatically reducing eye fatigue during long observing sessions and creating a deeply immersive viewing experience.\n\u003c\/p\u003e\n\u003cp\u003e\n  Included 62° 20mm LER eyepieces produce 24x magnification and a 2.6° field of view, while compatibility with all standard 1.25\" eyepieces lets you dial in magnification anywhere from 18x to 60x. The rugged magnesium housing is IPX6 waterproof and nitrogen-purged to prevent internal fogging, so you can count on the BT-82 whether you're stargazing in the backyard or observing in demanding field conditions. A 45° viewing angle, extendable dew caps, fine helical focus, and an integrated carrying handle complete a package that balances power, comfort, and portability.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e82mm Objective Lenses:\u003c\/strong\u003e Large aperture gathers abundant light for bright, detailed views of planets, deep-sky objects, the moon, and terrestrial targets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e480mm Focal Length \/ f\/5.7:\u003c\/strong\u003e Achromatic refractor Porro optical design produces sharp, high-contrast images across a wide field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded 62° 20mm LER Eyepieces:\u003c\/strong\u003e Two long eye relief eyepieces deliver 24x magnification and a generous 2.6° true field of view right out of the box.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterchangeable 1.25\" Eyepiece Compatibility:\u003c\/strong\u003e Accepts any standard 1.25\" \/ 31.7mm eyepiece, allowing magnification from 18x to 60x and optional filters for contrast enhancement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIPX6 Waterproof \u0026amp; Nitrogen-Purged:\u003c\/strong\u003e Sealed magnesium housing resists water ingress and internal fogging for reliable all-weather performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e45° Viewing Angle:\u003c\/strong\u003e Angled eyepiece configuration allows comfortable, relaxed viewing during extended astronomy or nature observation sessions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtendable Dew Caps:\u003c\/strong\u003e Help shield objective lenses from dew and stray light, maintaining optical clarity in humid or nighttime conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFine Helical Focus:\u003c\/strong\u003e Smooth, precise focusing mechanism allows easy, accurate adjustments for both near and distant targets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMagnesium Housing:\u003c\/strong\u003e Lightweight yet extremely durable construction designed for rugged outdoor and field use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Carrying Handle \u0026amp; Tripod Mount:\u003c\/strong\u003e Facilitates easy transport and secure mounting on a photo tripod or the optional Explore Scientific U-Mount with Field Tripod.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBT-82 SF Giant Binoculars (82mm)\u003c\/li\u003e\n  \u003cli\u003eTwo 62° 20mm LER Eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy You'll Love It\u003c\/h2\u003e\n\u003cp\u003e\n  The BT-82 SF is the kind of instrument that transforms a casual interest in astronomy or nature watching into a genuine passion - its immersive, wide-field views of star clusters, nebulae, and moonscapes are unlike anything a standard binocular or small telescope can offer. Backed by Explore Scientific's reputation for premium optics and rugged construction, this is a binocular built to deliver night after night of dependable, high-performance observation. The magnesium chassis and IPX6 waterproofing mean it's equally at home on a dewy observing field or a windswept hillside during a wildlife watch. Eyepiece interchangeability gives you lasting flexibility as your interests grow, and the 45° viewing angle makes those long sessions genuinely comfortable rather than a test of endurance. Whether you're a dedicated amateur astronomer, a birding enthusiast, or a nature observer seeking a serious upgrade, the BT-82 SF delivers clarity, comfort, and versatility that will keep you coming back to it for years to come.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eView Product Specs\u003c\/strong\u003e\u003c\/summary\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eItem Number\u003c\/th\u003e\n\u003ctd\u003e01-14210\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Design\u003c\/th\u003e\n\u003ctd\u003eAchromatic Refractor Porro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eObjective Lens Diameter\u003c\/th\u003e\n\u003ctd\u003e82 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd\u003e470 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd\u003ef\/5.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApparent Field of View\u003c\/th\u003e\n\u003ctd\u003e62 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTrue Field of View\u003c\/th\u003e\n\u003ctd\u003e2.6 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnification (Included Eyepieces)\u003c\/th\u003e\n\u003ctd\u003e24x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEyepiece Compatibility\u003c\/th\u003e\n\u003ctd\u003e1.25\" \/ 31.7mm standard eyepieces; 18x to 60x range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoating Type\u003c\/th\u003e\n\u003ctd\u003eEnhanced Multilayer Deposition (EMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit Pupil (Min)\u003c\/th\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Relief\u003c\/th\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWaterproof Rating\u003c\/th\u003e\n\u003ctd\u003eIPX6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eViewing Angle\u003c\/th\u003e\n\u003ctd\u003e45 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Length\u003c\/th\u003e\n\u003ctd\u003e445 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Width\u003c\/th\u003e\n\u003ctd\u003e226 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Height\u003c\/th\u003e\n\u003ctd\u003e122 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e4300 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHousing Material\u003c\/th\u003e\n\u003ctd\u003eMagnesium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a tripod to use the BT-82 SF?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eYes - at 4,300g and 24x magnification, the BT-82 SF requires a sturdy tripod for comfortable, shake-free viewing. The binocular features an integrated carrying handle with a standard tripod mounting point, making it compatible with most heavy-duty photo tripods. For the best experience, Explore Scientific also offers the optional U-Mount with Field Tripod, which is specifically designed for use with their large binocular lineup.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use my own eyepieces with the BT-82 SF?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eAbsolutely. The BT-82 SF accepts any standard 1.25\" (31.7mm) eyepieces, giving you the flexibility to adjust magnification from approximately 18x up to 60x depending on the eyepiece focal length you choose. You can also use 1.25\" filters for enhanced contrast when viewing the moon, planets, or nebulae.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the BT-82 SF suitable for daytime terrestrial use, or is it primarily for astronomy?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe BT-82 SF excels at both. Its 82mm objective lenses and wide 2.6° field of view make it excellent for nature observation, birding, wildlife watching, and scenic viewing during the day, as well as for astronomy at night. The 45° viewing angle is especially comfortable for scanning landscapes or tracking birds over extended periods.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does \"nitrogen-purged\" mean, and why does it matter?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eNitrogen purging means the internal air inside the binocular has been replaced with dry nitrogen gas before sealing. Because nitrogen contains no moisture, it eliminates the risk of internal fogging when the binocular moves between warm and cold environments. Combined with the IPX6 waterproof rating, this makes the BT-82 SF a reliable instrument in humid, cold, or rainy conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the warranty on the Explore Scientific BT-82 SF?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe BT-82 SF comes with an Explore Scientific limited warranty. To activate full coverage, Explore Scientific recommends registering your product within 60 days of purchase. Please refer to Explore Scientific's official warranty policy for complete terms and conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":55918236598577,"sku":"01-14210","price":1799.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/5bf0ebefe92d06b607b32dd75d2d09d4_0114210_m_1.jpg?v=1787663237","url":"https:\/\/omahasportsandgames.com\/products\/bt-82-sf-large-binoculars-with-62-degree-ler-eyepieces","provider":"Omaha Sports \u0026 Games","version":"1.0","type":"link"}