Specifications for Vixen BT81S-A Astronomical Telescope Binoculars:
| Aperture Ratio: | F/5.9 |
| Aperture: | 81mm (3.1") |
| Focal length: | 480 mm |
| Resolving Power: | 1.43 arc sec. |
| Light Gathering: | 134x |
| Interpupillary Distance: | 2.2" to 4" |
| Mount Block: | Dovetail Bar for SX/GP Tripods |
| Visual Back: | 31.7 mm - Friction Fit |
| Dimensions: | 18.9 x 7.4 x 6 inches |
| Weight: | 9 lbs |
Features of Vixen 81mm Astronomical Binoculars 14304:
- Carry Handle
- Finder Bracket
Package Contents:
- Vixen 81mm BT81S-A Astronomical Binoculars 14304