Compact twin hinge design easily fits in your hand. Extra-low Dispersion glass for optimum clarity. Fully multi-coated optics to produce sharp images. Focus knob with 1.9 turns. High resolution phase corrected BAK-4 roof prisms. Water repellent coating on objective lenses. Lightweight magnesium alloy chassis with leatherette. Twist-up eye cups with position stops for eye relief. Nitrogen Purged, Waterproof and Fog Proof. Includes: Leather Case, Neck Strap, Lens Covers, Lens Cloth.