... Waterproof, BAK 4 prism, fully multi coated Binger KZR Series binoculars: Features:1. 100% waterproof, nitrogen filled, fog proof, ... has it all. BAK 4 prisms, 7, 8,10, 12,or 16 x magnification with ultra wide field of view. ... enhancing brightness and clarity. Technical specificatioons of Binger waterproof binoculars: Item No.ModelField of viewEye reliefNear focusWaterproofKZR8458X45145m at 1000m435ft ...