Bushnell Infinity 8.5x45 Waterproof/Fogproof Roof Prism Binocular Rainguard water-repellent lens coating, XTR technology for maximum light transmission and optimal brightness PC-3 phase coating for enhanced contrast and clarity of image Fully multi-coated optics, BaK-4 roof prisms with Super High Reflection coating 100% waterproof, fogproof, dustproof construction 8.5x magnification, 45-millimeter objective lens