Light Transmission: 88% - Magnification: 8x - Lens Diameter: 25 mm - Exit Pupil Diameter: 3.1 mm - Twilight Factor: 14.1 - Field of View at 1000 m (yds): 119 m (357 ft) - Angular Field of View: 52° - Close Focusing Distance: 1.9 m (6.2 ft) - Diopter Adjustment Range: ?3.0 | + 3.0 dpt - Exit Pupil Distance: 16.0 mm - Interpupillary Distance: 35–72 mm - LotuTec | Nitrogen Filled: + | + - Water Resistance: 100 mbar - Operating Temperature: ?20 °C | + 63 °C (-4 °F | + 145 °F) - Length: 111 mm (4.4) - Width at an Interpupillary Distance of 65 mm: 115 mm (4.5) - Weight: 310 g (10.9 oz)