Bushnell Trophy 10x42 Realtree Camo Binocular (Camouflage) 10x magnification, 42-millimeter objective binoculars with lightweight and rugged roof prism system BaK-4 prisms and fully multi-coated optics for improved light transmission, image clarity, and brightness Ribbed, non-slip rubber armor absorbs shock while providing a firm grip; large center focus knob 100 percent waterproof/fogproof with O-ring seals and nitrogen purging Designed for hunting, birding, and wildlife viewing; limited lifetime warranty