Nikon Binoculars Monarch 8x42 DCF Waterproof Magnification (x) 8 Objective diameter (mm) 42 Angular field of view (Real/degree) 6.3 Angular field of view (Apparent/degree)* 47.5 Field of view at 1,000m (m) 110 Exit pupil (mm) 5.3 Relative brightness 28.1 Eye relief (mm) 19.6 Close focusing distance (m) 2.5 Interpupillary distance adjustment (mm) 56-72 Weight (g) 610 Length (mm) 146 Width (mm) 129 Type Roof