Covert Optics 10x42 Binocular Roof Prism BAK-4 Grey. Bullet-proof body construction and ED optics unite to create an exceptional binocular system thats determined to deliver a mix of field-ready performance in a compact design. Constructed around a rugged aluminum housing the dawn-to-dusk lens system delivers high contrast images with exceptional color in a wide variety of lighting conditions. An armor-coated housing ergonomics for exceptional fit and feel thats further enhanced by an ultra-smooth centralized focus and diopter dial for easy adjust. Specifications for Covert Optics 10x42mm Roof Prism Binocular: Manufacturer: Covert Optics Color: Grey Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK-4 Image Stabilizer: No Eye Relief: 17 mm Exit Pupil: 4.2 mm Binoculars Focus System: Center Focus Close Focus: 2 yds Weather Resistance: Fog Resistant Shock Resistant Water Resistant Water Resistance Level: Waterproof Length: 5.35 in Weight: 24 oz Fabric/Material: Aluminum Condition: New Package Type: Case Included Accessories: Standard Magnification Type: Fixed Width: 5 in Fogproof: Yes Shockproof: Yes Features of Covert Optics 10x42 Roof Prism Binocular High quality ED (Extra-Low dispersion) Glass and BAK-4 phase-corrected dielectric coated roof prisms to minimize diffraction; Diamond Bright multicoating for maximum light transmission glare reduction and scratch-resistance Package Contents: Covert Optics 10x42 Roof Prism Binocular Soft Case Neck Strap Lens Covers Lens Cloth Covert Optics CC0074: 10x42 Binocular Roof Prism BAK-4 Grey