Celestron Nature DX 12x56 Binoculars OD Green. This binocular manufactured by the experts at Celestron features phase-coated BaK-4 prisms and fully multi-coated optics to increase contrast and resolution. With large 56 mm objective lenses the Celestron Nature DX 12x56 Waterproof Binocular provides increased light-gathering abilities and maximum light transmission through the entire optical path for brighter images even in low light conditions. Celestron Nature DX 12x56 Fogproof Binoculars are waterproof fogproof and nitrogen purged to withstand harsh conditions. Specifications for Celestron Nature DX 12x56mm Roof Prism Binoculars: Manufacturer: Celestron Color: Green Magnification: 12 x Objective Lens Diameter: 56 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 16 mm 0.63 in Exit Pupil: 4.6 mm Field of View Linear: 289 ft at 1000 yds Field of View Angle: 5.5 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 21.16 Interpupillary Distance: 74 mm Close Focus: 9.8 ft Diopter Adjustment Range: +/-3 dpt Water Resistance Level: Waterproof Length: 6.5 in Weight: 36 oz Package Type: Box Included Accessories: Rainguard Instruction Manual Objective Lens Caps Lens Cloth Neck Strap Carrying Case Magnification Type: Fixed Width: 5.75 in Tripod Adaptable: Yes Fogproof: Yes Brightness Index: 21.16 Case: Yes Nitrogen Filled: Yes Height: 3 in Armoring: Rubber Armored Features of Celestron Nature DX 12x56 Fogproof Binoculars: Waterproof and fully rubber armored. Phase coated BaK-4 prisms for increased contrast and resolution. Fully multi-coated optics provide brighter images by increasing light transmission through the entire optical path. Tripod adaptable for long viewing sessions. Sturdy twist-up eyecups with multiple stops. Eyeglass friendly with 16 mm of eye relief. Package Contents: Celestron Nature DX 12x56 Binocular Celestron 71336: Nature DX 12x56 Binoculars OD Green