Bushnell H2O 12x42 Waterproof/Fogproof Binocular Waterproof, fogproof binoculars designed for use on or in the water O-ring-sealed and nitrogen-purged to complete lock out moisture Rubber armoring with textured pads; large center focus knob 12x magnification and 42mm objective diameter; 15-foot close focus distance Fold-down eyecups and long 15mm eye relief; limited lifetime warranty