{"product_id":"explore-scientific-01-14230","title":"Explore Scientific BT-120 SF Large Binoculars","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLarge-Aperture Binocular Telescope Design\u003c\/li\u003e\n\u003cli\u003eAngled Eyepiece Holders for Comfortable Viewing\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 1.25\" Eyepieces\u003c\/li\u003e\n\u003cli\u003eNitrogen-Purged, Waterproof, and Fog-Proof\u003c\/li\u003e\n\u003cli\u003eRobust Magnesium Body Construction\u003c\/li\u003e\n\u003cli\u003eIndividual Helical Eyepiece Focusing\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-120 SF Large Binoculars\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific BT-120 SF Large Binoculars merge the light-gathering power of a dual refractor telescope with the comfort of two-eyed viewing, producing exceptionally bright and detailed images for both astronomy and terrestrial observation. These giant binoculars deliver an immersive, wide-field experience, revealing stunning detail on the Moon's craters, planets, and bright deep-sky objects. For terrestrial use, they bring distant landscapes and wildlife into sharp, clear focus.\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 Dual Refractor System for Bright, Immersive Views\u003c\/h3\u003e\n\u003cp\u003eBy using two large objective lenses—one for each eye—the BT-120 SF creates a three-dimensional effect that a single telescope cannot replicate. This design enhances contrast and makes faint details easier to perceive. All optical surfaces feature professional-grade coatings to maximize light transmission, resulting in bright, vivid images with high contrast 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\u003eEngineered for Fatigue-Free Observation Sessions\u003c\/h3\u003e\n\u003cp\u003eUnlike straight-through binoculars that force you to crane your neck, the BT-120 SF features angled eyepiece holders for comfortable, sustained viewing, whether you're scanning the zenith or a distant horizon. Each eyepiece focuses independently with a smooth, precise helical mechanism, allowing you to achieve perfect focus for your individual eyes. The design incorporates generous eye relief and soft eyecups, ensuring comfort during long 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\u003eRobust, All-Weather Magnesium Construction\u003c\/h3\u003e\n\u003cp\u003eThe BT-120 SF is built to withstand the rigors of field use in any environment. The main body is constructed from a robust magnesium housing that is both strong and lightweight. The optical barrels are sealed and purged with inert nitrogen gas, which prevents internal fogging and makes the binoculars fully waterproof, protecting the internal optics from humidity, dew, and rain.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtendable Dew Caps:\u003c\/strong\u003e Integrated dew shields slide forward to prevent condensation from forming on the objective lenses during cool, damp nights and block stray light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentral Carrying Handle:\u003c\/strong\u003e A sturdy handle provides a secure grip for transport and simplifies the process of mounting the heavy binoculars onto a tripod head.\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\u003eA Flexible System with Interchangeable 1.25\" Eyepieces and Filter Compatibility\u003c\/h3\u003e\n\u003cp\u003eA key feature of the BT-120 SF is its ability to accept standard 1.25\" astronomical eyepieces. This allows you to change magnification by swapping eyepiece sets, tailoring the view to your target. The eyepieces are held securely by precise brass compression ring clamps that ensure perfect alignment without marring the eyepiece barrels. The 1.25\" format also means you can use standard color and nebula filters to enhance your astronomical observations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Requirement:\u003c\/strong\u003e Due to their size and weight, these binoculars require a substantial mount. For optimal stability and smooth motion, the optional Explore Scientific U-Mount with a compatible field tripod is highly recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Explore Scientific BT-120 SF different from standard binoculars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe BT-120 SF is a binocular telescope. Unlike standard binoculars, it features very large objective lenses for superior light gathering, and crucially, it allows you to use interchangeable \u003cstrong\u003e1.25\" astronomical eyepieces\u003c\/strong\u003e. This provides the flexibility to change magnification, a feature typically reserved for telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my existing 1.25\" telescope eyepieces with the BT-120 SF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The BT-120 SF is designed to be compatible with most standard 1.25\" eyepieces. This allows you to leverage your existing eyepiece collection to achieve a wide range of magnifications for viewing everything from wide star fields to fine planetary detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the BT-120 SF suitable for terrestrial viewing like birdwatching?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The immense light-gathering ability and high-resolution optics make the BT-120 SF exceptional for long-distance terrestrial observation. The angled eyepieces provide a comfortable viewing posture for observing wildlife, landscapes, or maritime traffic for extended periods.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would lunar craters appear in the BT-120 SF binoculars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eViewing the Moon through the BT-120 SF is a truly immersive experience. The two-eyed view creates a distinct 3D-like effect, making craters and mountain ranges along the terminator appear to have more depth and relief than in a conventional single-eyepiece telescope. The view is bright, sharp, and incredibly detailed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of tripod is required for the Explore Scientific BT-120 SF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese are large, heavy instruments and require a very sturdy support system. A standard photographic tripod is insufficient. An astronomical-grade tripod paired with a specialized mount, such as the \u003cstrong\u003eExplore Scientific U-Mount\u003c\/strong\u003e, is recommended to ensure stability and provide smooth, controllable movements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the BT-120 SF perform on bright deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn objects like the Orion Nebula (M42) or the Andromeda Galaxy (M31), the BT-120 SF's large twin apertures gather a great deal of light, resulting in a bright, high-contrast image. The binocular view often makes it easier to perceive faint, extended nebulosity and structure compared to viewing with a single eye.\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\u003e00811803033955\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":52909235962141,"sku":"ES-01-14230","price":3500.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-BT-120-SF-Large-Binoculars-with-62-Degree-LER-Eyepieces-1_9b7b614d-34af-470a-a6ac-312801358c32.jpg?v=1789060847","url":"https:\/\/davidastro.com\/products\/explore-scientific-01-14230","provider":"David Astro","version":"1.0","type":"link"}