Brand Nikon color black Material plastic pupil distance 14mm Description of Binocular Prism Porro Prism Focus type Center focus Apparent field of view: 47.5° (using a formula based on the reference standard ISO14132-1:2002) Brightness: 4.4 Eye relief: 11.1mm Pupil diameter: 2.1mm Visibility at 1000m: 73m Close range (shortest focusing distance): 4.0m