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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars
Explore Scientific BT-120 SF Large Binoculars

Explore Scientific BT-120 SF Large Binoculars

par Explore Scientific
UGC ES-01-14230
$2,499.99 - $2,499.99
$2,499.99
$2,499.99 - $2,499.99
$2,499.99
Égalisation de prix!
  • Large-Aperture Binocular Telescope Design
  • Angled Eyepiece Holders for Comfortable Viewing
  • Accepts Standard 1.25" Eyepieces
  • Nitrogen-Purged, Waterproof, and Fog-Proof
  • Robust Magnesium Body Construction
  • Individual Helical Eyepiece Focusing
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Livraison GRATUITE aux USA
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Explore Scientific BT-120 SF Large Binoculars

    The 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.

    A Dual Refractor System for Bright, Immersive Views

    By 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.

    Engineered for Fatigue-Free Observation Sessions

    Unlike 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.

    Robust, All-Weather Magnesium Construction

    The 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.

    • Extendable Dew Caps: Integrated dew shields slide forward to prevent condensation from forming on the objective lenses during cool, damp nights and block stray light.
    • Central Carrying Handle: A sturdy handle provides a secure grip for transport and simplifies the process of mounting the heavy binoculars onto a tripod head.

    A Flexible System with Interchangeable 1.25" Eyepieces and Filter Compatibility

    A 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.

    • Mounting Requirement: 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.

  • What makes the Explore Scientific BT-120 SF different from standard binoculars?

    The 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 1.25" astronomical eyepieces. This provides the flexibility to change magnification, a feature typically reserved for telescopes.

    Can I use my existing 1.25" telescope eyepieces with the BT-120 SF?

    Yes. 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.

    Is the BT-120 SF suitable for terrestrial viewing like birdwatching?

    Absolutely. 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.

    How would lunar craters appear in the BT-120 SF binoculars?

    Viewing 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.

    What kind of tripod is required for the Explore Scientific BT-120 SF?

    These 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 Explore Scientific U-Mount, is recommended to ensure stability and provide smooth, controllable movements.

    How does the BT-120 SF perform on bright deep-sky objects like the Orion Nebula (M42)?

    On 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.

  • GTIN 00811803033955
  • Explore Scientific Warranty