Keep your eye on the prize when you use the Celestron Nature DX ED 10 x 50 Binoculars. These binoculars are equipped with Extra-Low Dispersion (ED) objective lenses, multicoated optics and Phase coated Bak-4 prisms for crisp, clear and vibrant viewing. The construction features a rubber-armored, polycarbonate housing with a waterproof finish for durability and a dry nitrogen gas-filled design to prevent fog.