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Oberwerk 80mm 45° Binocular Telescope The BT-80-45 is a smaller and lighter version of our 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. The same fork mount and hardwood tripod (as shown) that comes standard with the BT-100-45 is available as an option, 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 high magnifications, you'll enjoy perfectly-merged images. Objective size 80mm Magnification Your choice (any 1.25") Ships with 20x pair Prism BAK4 Optic coating Fully Broadband Multi-coated including prisms and oculars Field of view 20x- 3.0° Apparent FOV- ~60° Focal Length 520mm (f/6.5) Exit pupil diameter 20x- 4mm Exit pupil distance (eye relief) 20x- 16mm IPD (inter-pupil distance) range 58-80mm Weight 16 lbs., fork/tripod 22 lbs.

BT-80, Ocular View