Magnification (x) 10 Angular Field of View (real) (degrees) 5.6 Nikon Binoculars Sporter EX 10x50 Angular Field of View (apparent) (degrees)* 52.1 Effective Objective Diameter (mm) 50 Field of View at 1,000m (m) 98 Exit pupil (mm) 5.0 Relative Brightness 25.0 Eye Relief (mm) 19.6 Close Focus Distance (m) 5.0 Interpupillary Distance Adjustment (mm) 56-72 Weight (g) 825 Length (mm) 187 Width (mm) 139 Type Roof