Bushnell Trophy 10x42 Waterproof/Fogproof Roof Prism Binocular (Realtree AP Camo) BaK-4 roof prisms for bright, clear, crisp viewing Fully multi-coated optics for superior light transmission and brightness Waterproof, O-ring sealed and nitrogen-purged for 100% reliable, fog-free performance Realtree AP camouflage color great for whenever concealment is crucial to your success 10x magnification, 42-millimeter objective lens