
| Model | BSH637 | ||
| Specification | 15-45x50 | 20-60x60 | 20-60x80 |
| Magnification | 15x - 45x | 20x - 60x | 20x - 60x |
| Obj.lens (mm) | 50 | 60 | 80 |
| Angle | 2.6°-1.26° | 2.3°-1.1° | 1.8° -1.0° |
| Field of View at 1000m | 45 - 22 | 40.2 -19.2 | 31.4 - 17.5 |
| Apparent Field of View | 39°- 56° | 46°- 66° | 36° - 60° |
| Exit pupil (mm) | 3.3 - 1.1 | 3.0 - 1.0 | 4.0 - 1.33 |
| Eye relief (mm) | 17- 14 | 17- 14 | 17- 14 |
| Dusk Index | 27 - 47 | 34 - 60 | 40 - 69 |
| Relative Brightness | 11 - 1.2 | 9.0 - 1.0 | 16 - 1.0 |
| Lens Coating | Fully Multi | ||
| Eyecups | Fold-Down | ||
| Waterpoof(Y/N) | Y | ||
| Size (mm) | 280x90x165 | 340x90x165 | 430x90x165 |
| Weight (g) | 740g | 873g | 1,230g |
| Specification: | 12-36x50mm;15-45x50mm | ||
| 15-45x60mm;20-60x60mm | |||
| 20-60x80mm;25-75x80mm | |||
| * Can connect the camera to take pictures | |||