- Magnification: 14 - Obj. Lens Dia. (mm): 40 - Eye Relief (mm): 13 - Diopter Adjustment: -4 - Minimum Focusing Distance: 5m - Apparent Field of View: 4° - Field of View at 1000m: 87.5 - Exit Pupil Dia. (mm): 2.86 - Relative Brightness: 8.18 - Interpupillary Distance: 60-70mm - Length (mm): 186 - Max Width (mm): 148 - Operating Temperature Range: -10°C~50°C 14°F~122°F