Nikon Binoculars Monarch 8.5x56 Magnification (x) 8.5 Objective diameter (mm) 56 Angular field of view (Real/degree) 6.2 Angular field of view (Apparent/degree) 52.7 Field of view at 1,000m (m) 108 Exit pupil (mm) 6.6 Relative brightness 43.6 Eye relief (mm) 19.2 Dioptre adjustment ±2 Close focusing distance (m) 10 Interpupillary distance adjustment (mm) 60-72 Weight (g) 1,140 Length (mm) 197 Width (mm) 144 Type Roof