Oberwerk BT-70-45 Binocular Telescope – Oberwerk
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Oberwerk BT-70-45 Binocular Telescope


Oberwerk BT-70-45 Binocular Telescope

(2 customer reviews)
4.50 out of 5 based on 2 customer ratings


Oberwerk 45° 70mm Binocular Telescope, the smallest and least expensive binocular with 1.25″ focusers on market. Includes 16x FMC oculars. Triplet objectives, broadband multi-coating throughout. Aluminum-frame case. Requires tripod mount.

Binocular and Mount Options:

Optional Magnifications:

asy-2010starproduct_logo100wThe new 45° 70mm Binocular Telescope is the smallest and least-expensive binocular telescope on the market. At just over a foot in length, it is approximately half the size of the 45° 100mm Binocular Telescope, and at 8.5 lbs., is just 1/3 of the weight. For those with limited space, or needing easy portability, this new model is a great choice. Of course it also has Oberwerk’s signature broadband multi-coatings on every lens surface, including the porro prisms and triplet objectives. Our finest 23.9mm (16x) fully multi-coated wide-angle (65° AFOV) eyepieces are included, and because of the industry-standard 1.25″ helical focusers, your favorite telescope eyepieces can be used as well. 8mm eyepieces will provide 48x magnification in this binocular, which is the recommended limit. The built-in retractable glare shields minimize reflections.
Complete package price includes binocular, removable handle, aluminum-frame case, and 16x eyepieces. If you need a mount, choose either the Oberwerk 4000 tripod/head, Manfrotto MT190X3 tripod/MVH500AH head or Oberwerk wood tripod/Oberwerk 5000 head. To add a finder, order the BT-70-45 finder mount. Because accurate collimation is critical at higher magnifications, every Oberwerk binocular is collimated prior to shipping- astronomy072013-1so even at high magnifications, you’ll enjoy perfectly merged images. 3-year Limited Warranty.
Here is a BT-70-45 review by Phil Harrington from the July 2013 issue of Astronomy Magazine.

Additional information

Weight 24 lbs
Dimensions 19 x 19 x 11 in

4.0° (16x)

Exit Pupil

4.3mm (16x)

Eye Relief

16mm (16x)

Minimum Focus

15 meters

IPD Range


Product Weight

8.5 lbs.

Product Dimensions

L=12", W=8.5", H=5.5"

2 reviews for Oberwerk BT-70-45 Binocular Telescope

  1. 5 out of 5

    I received my binocular telescope today and I wanted to thank you for the expedited shipping. The binoculars are amazing!! They look gorgeous, are very solid, plus the daytime images are clearer and sharper than I have ever seen in any binocular. I really like it and hope to use it tonight for our 2nd gathering since (at last) we are supposed to have clear skies. Again, thank you so much for your help – this is going to be a great asset for my classes and my own personal use.

  2. 4 out of 5

    BT-70-45 Binocular Telescope was purchased back on November 2016. It’s a truly amazing instrument. The best instrument for astronomy are the ones that are used the most, the portability speaks for itself. There is no reason to be lazy and say “I’m not carrying out this heavy equipment today.” Optical wise the best $800.00 I’ve ever spent. Views of Orion, Cygnus, Lyra constellation, the moon – day or night are amazing. We heard before but good things come in small packages. The only thing I would suggest to the manufacturers is to machine in threads to add filters to the front objective lenses.

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