Bushnell H20 7 x 50 Porro Prism Binocular Waterproof binocular with 7x magnification and 50mm objective lenses O-ring-sealed and nitrogen-purged for complete waterproof protection Multicoated optics and premium-quality BaK-4 prism glass Rubber armoring with textured pads; large center focus knob Tripod-adaptable; twist-up eyecups; weighs 34.5 ounces