Expanded Specifications Zeiss SFL 10X40 Binoculars
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| Magnification | 10 × |
| Effective lens diameter | 40 mm |
| Light transmission | 90% |
| Exit pupil diameter | 4.0 mm |
| Twilight factor | 20 |
| Field of view at 1,000 m |
(yds) 115 m (345 ft) |
| Subjective viewing angle | 60° |
| Close focusing distance | 1.5 m (4.9 ft) |
| Diopter adjustment range | − 4.0 | + 4.0 dpt |
| Exit pupil distance | 18 mm |
| Pupil distance | 52 – 74 mm |
| Lens type | UHD |
| Prism system | Schmidt-Pechan |
| LotuTec | Nitrogen filled + | + | Yes |
| Water resistance | 400 mbar |
| Operating temperature |
− 20°C | + 55°C (− 4°F | + 131°F) |
| Length | 144 mm (5.7 ") |
| Width at an interpupillary distance of 65 mm | 114 mm (4.5 ") |
| Weight | 640 g (22.6 oz |
