Zoom 10x to 30x closer and any power in between! Features a large 50mm front objective diameter for maximum brightness. Center Focusing with left-eye diopter, Impact Resistant, Rubber Armored, High Resolution Multi-Coated Lenses make this binocular perfect for astronomy and other high power applications. There s also a tripod socket for stand still and stationary Use. Includes Carrying Case, Lens Caps, and Lens Cleaning Cloth.