Celestron Nature DX 8X42mm Roof Prism Binoculars Black. This Binocular from the experts at Celestron you'll get the important features you're looking for like fully multi-coated optics and BaK-4 prisms while staying within your budget. The Celestron 8x42mm DX Outdoor Binocular can withstand harsh weather thanks to its fully waterproof housing that is purged of air and filled with dry nitrogen gas. Specifications for Celestron Nature DX 8x42mm Roof Prism Binoculars: Manufacturer: Celestron Color: Black Magnification: 8 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK-4 Eye Relief: 17.5 mm Exit Pupil: 5.25 mm Field of View Linear: 388 ft at 1000 yds Field of View Angle: 7.4 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 18.33 Interpupillary Distance: 56 - 74 mm Close Focus: 6.5 ft Diopter Adjustment Range: -3 - 3 dpt Water Resistance Level: Waterproof Length: 5.3 in Weight: 22.2 oz Fabric/Material: Steel Package Type: Box Magnification Type: Fixed Tripod Adaptable: Yes Fogproof: Yes Case: Yes Brightness Index: 27.56 Nitrogen Filled: Yes Features of Celestron Nature DX 8x42mm Roof Prism Binoculars Phase coated BaK-4 prisms produce vivid true-to-life colors Fully multi-coated optics deliver maximum light transmission through the optical path Eyeglass friendly - generous eye relief and sturdy twist-up eyecups with multiple stops 6.5ft close focus Accepts an optional tripod adapter for extended viewing sessions Package Contents: Celestron Nature DX 8x42mm Roof Prism Binoculars Neck Strap Objective Lens Caps Rainguard Carrying Case Lens Cloth Instruction Manual Celestron 72322: Nature DX 8X42mm Roof Prism Binoculars Black