Model | BT5574 | ||
Specification | 8x25mm | 10x25mm | 12x25mm |
Magnification | 8x | 10x | 12x |
Obj.lens (mm) | 25 | 25 | 25 |
Angle | 6.5° | 6.2° | 4.5° |
Field of View at 1000m | 114 | 108 | 78 |
Apparent Field of View | 52° | 62° | 54° |
Exit pupil (mm) | 3.1 | 2.5 | 2.1 |
Eye relief (mm) | 13 | 13 | 13 |
Dusk Index | 14.1 | 15.8 | 17.3 |
Relative Brightness | 9.6 | 6.2 | 4.3 |
Type of Prism | Porro / Bak4 | ||
Focus System | Central | ||
Lens Coating | Fully Multi | ||
Eyecups | Fold-Down | ||
Size (mm) | 115(L)x50(W)x112(H) | ||
Weight (g) | 298 g | ||
ED binoculars Bak4 prism |