10X50 Marine Binoculars for Adults With Rangefinder Compass Hunting Binoculars for Boating Navigation Nitrogen Waterproof with Internal Rangefinder Compass10x50 Waterproof, Battalion, with Internal Rangefinder Directional Compass, Designed to meet military standards,100% Waterproof and fogproof, Fully multi-coated optics, BAK-4 prisms,Individual eyepiece focus, Fold down eyecups, Attached lens covers, Rubber armor covered, whether you are ashore or on the water, this binocular is designed to perform in the most demanding conditions.Magnification:10XObjective lens diameter: 50mmPrism Type: Porro Prism BinocularsPrism Glass: BAK4Weight(kg):900gType:BinocularsSize:16.5CM*19CM*6CMFocus System: IndividualField Angle: 7.5 degreeField of view: 396 (FT/1000 yards); 132 (M/1000M)Exit Pupil: 6.8mmExit Relief: 23mm (Long eye relief for eyeglass wearers)Lens coating: Fully multi-coatedClose Focusing Distance: 2.5mDiopter adjusting range: -5-+5 DIOPTERInterpupillary distance: 56-72 mmFeatures: Compass,Floating,Rangefinder,WaterproofEye cup: Fold downPacking:1.carrying bag2.neck strap3.objective covers4.lens cleaning cloth5.battery:2 LR936 Note: Due to Air-