Bushnell Elite E2 10x42 Waterproof/Fogproof Roof Prism Binocular Advanced fusion hybrid lens system with Rainguard water-repellent lens coating Fully multi-coated optics with PC-3 phase coating, BaK-4 roof prisms O-ring sealed for 100% waterproof, fogproof, dustproof construction 15.5-millimeter long eye relief 10x magnification, 42-millimeter objective lens