Multicoated aspherical eyepiece lenses and BaK4 prisms: Deliver bright high-resolution images under all lighting conditions. - Generous eye relief: For a clear and comfortable view especially for eyeglass wearers. Includes turn-and-slide rubber eyecups. - Fully waterproof/fogproof: Nitrogen-filled and O-ring sealed. - Smooth central focus knob: Fast range of focus for quick viewing. - Durable and protective rubber-armored coating: Provides a sure non-slip grip wet or dry - Focusing System: Central Focus - Magnification: 12 x - Objective Diameter: 25 mm - Angular Field of View (Real): 4.2 - Angular Field of View (Apparent): 47.5 - FOV at 1000 yds: 220 ft - Close Focus Distance: 9.2 ft - Exit Pupil: 2.1 mm - Relative Brightness: 4.4 - Eye Relief: 15.9 mm - Size (Length x Width): 4.1 x 4.5 in - Weight: 12.9 oz - Interpupilary Distance: 56 -72 mm - Prism: Porro
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