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The BT-80-45 is a smaller and lighter version of Oberwerk's highy-acclaimed 100mm 45° Binocular Telescope. It is the least expensive binocular on the market that offers 45° viewing and 1.25" focusers. Of course, the 45° 80mm Binocular Telescope also has Oberwerk's signature broadband multi-coatings on every lens surface, including the massive porro prisms. 20x fully multi-coated wide-angle eyepieces are included, but because of the industry-standard 1.25" helical focusers, your favorite telescope eyepieces can be used as well. Long f/6.5 focal ratio assures excellent color correction. The same fork mount and hardwood tripod (as shown) that comes standard with the BT-100-45 is included in this package, or use with your own favorite mount (bottom-mount plate is tapped with standard 3/8" threading). Because accurate collimation is critical at higher magnifications, every Oberwerk binocular is collimated prior to shipping - so even at 100x, you'll enjoy perfectly merged images.
| Objective Size |
80mm |
| Magnification |
20x oculars included
Variable using your other 1.25" eyepieces |
| Prism |
BAK4 |
| Optic Coating |
Fully Broadband Multi-coated including prisms and oculars |
| Field of View |
20x- 3.0°
Apparent FOV- ~60° |
| Exit Pupil Diameter |
20x - 4mm |
| Exit Pupil Distance (Eye Relief) |
20x - 16mm |
| Minimum Focus Distance |
58 - 80mm |
| Weight |
16 lbs., fork/tripod 22 lbs. |
If you have any comments or reviews you'd like to share with us, please email us. Thank you. |
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