Nikon

Bright multicoated optics: Multiple layers of anti-reflective compounds offer excellent brightness and resolution. - Generous eye relief: 22.7mm of eye relief provides comfortable viewing for eyeglass wearers. - Durable rubber armor: Gives you a solid surface to gripeven when wet. - Smooth central focus knob: Fast range of focus for quick viewing. - Large exit pupils: Maximum exit pupil ensures you catch the image even with motion at sea. - Waterproof/fogproof: Nitrogen filled and O-ring sealed. - Focusing System: Central Focus - Magnification: 7 x - Objective Diameter: 50 mm - Angular Field of View (Real): 7.2 - Angular Field of View (Apparent): 50.4 - FOV at 1000 yds: 378 ft - Close Focus Distance: 33 ft - Exit Pupil: 7.1 mm - Relative Brightness: 50.4 - Eye Relief: 22.7 mm - Size (Length x Width): 7.6 x 8 in - Weight: 38 oz - Interpupilary Distance: 56 -72 mm - Prism: Porro