Product Info for Leupold BX-4 Pro Guide HD 10x42mm Binoculars For performance that won't weigh you down on long, back country hunts, you need the BX-4 Pro Guide HD binoculars. They deliver the brightness, edge-to-edge sharpness, and contrast guides demand, and we've taken extra steps to eliminate glare. You won't find binoculars that work better in the worst light or reveal more in those crucial minutes at dawn and dusk. WARNING: California`s Proposition 65 Specifications for Leupold BX-4 Pro Guide HD 10x42mm Binoculars: Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 16 mm Exit Pupil: 4.2 mm Field of View, Angle: 7.5 degrees Optical Coating: Twilight Max HD Light Management System Binoculars Focus System: Center Focus Close Focus: 2.3 m Weather Resistance: Fog Resistant Water Resistance Level: Waterproof Length: 5.6 in Weight: 24 oz Package Type: Box Included Accessories: Lens Covers, Lens Cloth, Shoulder Strap, Case Magnification Type: Fixed Features of Leupold BX-4 Pro Guide HD Ergonomic Binoculars: Absolute waterproof and fog proof integrity - each is ready for a lifetime in the field, in all conditions. The durable aluminum housing is shrouded in a rubber armor coating that provides a positive grasp. BAK 4 Prisms. Deliver a perfectly round exit pupil with virtually no edge distortion and a crisp, clear image. Ergonomic design ensures our products are slim, lightweight, and fit well in your hands no matter what size they are. Fully multi-coated lens system ensures maximum brightness for clarity, contrast, and color fidelity. High-definition, calcium-fluoride lenses ensure incredible clarity at all magnification levels. Open bridge, roof prism design is extremely lightweight and ergonomic. Phase coated roof prisms significantly increase resolution for a sharp sight picture from edge-to-edge of the visual field. Twilight Max HD Light Management System combines exceptional light transmission and glare management to provide vivid, bright, high contrast images from dawn until dusk. Twist-up eyecups and generous eye relief for comfortable extended viewing. Leupold Full Lifetime Guarantee.