... thumb depressions for comfortable, long-term viewing, waterproof, fogproof, nitroge Binger 10x42 water proof binoculars:Perfect balance, light weight, and ergonomic thumb ... -4 prism. Near foucs from 2m to infinity. Binger 10X42 waterproof binoculars: Item No.HL1042Model:10X42Exit pupil:4.2mmEye relief:15.8mmField ...