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 Lens Diameter | 80mm |
|---|---|
| Case | Yes |
| Coatings | Fully Broadband Multi-Coated including Prisms & Oculars |
| Exit Pupil | 4mm |
| Eye Relief | 16mm |
| Field of View (Angular) | 3.0° |
| Inter-Pupillary Distance | 58 - 80mm |
| Magnification | 20x |
| Tripod Adaptable | Yes |
| Warranty | One Year Limited Manufacturer's Warranty |
| Weight | Binoculars 16 lbs, Fork/Tripod 22 lbs |

