Expanded Specifications Zeiss SFL 8X40 Binoculars
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| Magnification | 8x |
| Effective lens diameter | 40mm |
| Light transmission | 90% |
| Exit pupil diameter | 5.0mm |
| Twilight factor | 17.9 |
| Field of view at 1,000m (yds) | 140m (420 ft) |
| Subjective viewing angle | 60° Ww |
| Close focusing distance | 1.5m (4.9 ft) |
| Diopter adjustment range |
− 4.0 | + 4.0 dpt |
| Exit pupil distance | 18mm |
| Pupil distance | 52–74mm |
| Lens type | UHD |
| Prism system |
Schmidt-Pechan |
| Water resistance | 400 mbar |
| Operating temperature |
−20°C | +55°C (−4°F | +131°F) |
| Length | 144mm (5.7") |
| Width at an interpupillary distance of 65mm | 114mm (4.5") |
| Weight | 640g (22.6oz) |
