Brand: Orion Telescopes USD

Orion GiantView™ 22x70mm BT45-deg Binocular Telescope (w/case) (51876)


Brand: Orion Telescopes USD

Orion GiantView™ 22x70mm BT45-deg Binocular Telescope (w/case) (51876)


  • 70mm objective lenses provide bright and immersive views of both starry skies and daytime terrestrial scenes
  • Accepts interchangeable 1.25" eyepiece pairs for a variety of magnification options (additional eyepieces sold separately)
  • Included pair of 18mm, 65 eyepieces provide 22x views out of the box
  • Waterproof and nitrogen purged, featuring comfortable 45 eyepiece orientation and individual eyepiece focusers
  • Weighs 6.6 pounds
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$1,574.95 USD

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Special Order
$1,574.95 USD

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Product Description

With 70mm objective lenses, the Orion GiantView BT-70 Binocular Telescope delivers an immersive experience while being very compact and portable.

Stargazing with two eyes provides an amazing amount of depth while also making observations more relaxing and comfortable. Views of everything from lunar craters to brighter nebulae will take on an almost 3D feel in the GiantView BT-70. These lenses gather 96% more light than 50mm binoculars, so you'll be able to see more objects in the sky with greater clarity. But the fun doesn't stop there! This binocular telescope becomes a fantastic "spotting scope" for terrestrial exploration during the day. The 45° eyepiece angle makes both daytime and nighttime observations comfortable.

The BT-70 includes a pair of 18mm 65° 1.25" eyepieces which provide 22x magnification and a 2.9° field. The included eyepieces are threaded for 1.25" filters which can be used to enhance the view. Individual eyepiece focus provides precise focus control, while compression rings hold eyepieces securely in place.

Our favorite feature of the BT-70 is its ability to accept pairs of 1.25" eyepieces so you can control power depending on your observing goals. For example, a pair of 10mm eyepieces will deliver a 40x view through the 400mm focal length BT-70. For the best results, we recommend using 8mm or longer focal length 1.25" eyepieces with the BT-70.

Since the GiantView BT-70 accepts eyepieces, you can also use pairs of 1.25" light pollution filters to improve contrast while observing brighter deep sky objects. With light pollution filters installed, the GiantView BT-70 provides incredible views of many star clusters and nebulae.

Thanks to its sealed and nitrogen purged body, the rugged BT-70 is waterproof for use in damp conditions, but it's not designed for permanent outdoor installation. The GiantView BT-70 weighs in at 6.6 lbs. and works on most sturdy photo tripods. A built-in threaded 1/4"-20 socket allows secure tripod attachment. Includes hard foam-lined carry case.

    What's in the Box

    • Orion GiantView BT-70 Binocular Telescope
    • Two 18mm 65° 1.25" eyepieces
    • Two objective lens caps
    • Two eyepiece caps
    • Hard foam-lined carry case


    Best for viewing Lunar & bright deep sky
    User level Intermediate
    Magnification 22x
    Optical diameter 70mm
    Field of view - angular 2.9°
    Field of view - linear 74.3 ft./1000 yd
    Apparent field of view 65.0°
    Eye relief 17.0mm
    Exit pupil 3.2mm
    Near focus 40 ft.
    Coatings Fully multi-coated
    Prism BAK-4 Porro
    Interpupillary distance range 61mm - 73mm
    Focus style Individual eyepiece focus
    Waterproof Yes
    Tripod adaptable Yes
    Diopter adjustment Yes
    Weight 6.6 lbs.
    Height 4.7 in.
    Additional included accessories
    • Neckstrap
    • Objective caps
    • Eyepiece caps
    Other features
    • 2nds are covered by Orion's Satisfaction Guarantee
    Warranty One year

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