PowerView 20x50 Porro Binocular Black

20x Magnification with 50mm Objective lens. 100% Waterproof - O-ring sealed and nitrogen purged for fog-free performance. Non-slip rubber armor provides shock resistance and protection. Porro Prism system. BK-7 Prism glass. Field of view @ 1000yds: 175ft. Close focus: 45ft. Exit pupil: 2.5mm. Eye relief: 9mm. Fold down eyecups. Tripod adaptable (tripod NOT included).