SPECS: Magnification: 8x Objective Lens: 32mm Length: 5.7 in. Width: 5.1 in. Height: 2.6 in. Weight: 22.8 oz. Exit Pupil Diameter: 4mm Exit Pupil Distance Eye Relief: 18mm Field of View @ 1000 : 450 ft. Field of View Degrees: 8.5deg Field of View w/ Eye Glasses (%): 8.5deg Field of View Apparent: 65deg Shortest Focusing Distance: 6.6 ft. Diopter Adjustment: 4 dpt Diopter Correction At Infinity: 5 dpt Light Transmission: 92% Pupil Distance: 2.1-2.8 in. Twilight Factor Acc. To ISO 14132-1: 16.0 Functional Temperature: -13 to +131degF Storage Temperature: -22 to +158degF Submersion Toughness: 13 ft. / 4 meters water depth DESIGN & DETAILS: Fluorite-containing HD glass elements Ultra-wide 70 degree viewing angle Swarobright, Swarotop, and Swarodur coatings Nitrogen filled construction delivers fogproof & waterproof performance Delivers long eye relief and a comfortable exit pupil Short closed bridge design Three position twist-up eyecups Rubber armored magnesium alloy housing Includes soap & brush cleaning kit