Nikon Prostaff 7S 8x42mm Roof Prism Waterproof Binoculars Black. This Binocular from the optics experts at Nikon Sport Optics attains a stylish exterior to enhance it's fashionability the grip is designed for more comfortable holding and meticulous attention has been paid to details like the the knurling on the focusing ring for user-friendly operation. The Nikon Prostaff 7S Binocular features a nitrogen-gas-filled waterproof structure so that they can be used for a wide variety of purposes such as birdwatching nature watching and other outdoor activities without being affected by the weather. For a great way to make sure you are looking through the clearest possible optics choose the Nikon 8x42mm Prostaff 7S Binocular. Specifications for Nikon Prostaff 7S 8x42mm Roof Prism Waterproof Binoculars: Manufacturer: Nikon Color: Black Magnification: 8 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK-4 Eye Relief: 19.5 mm Exit Pupil: 5.3 mm Field of View Linear: 357 ft at 1000 yds Field of View Angle: 6.8 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 18.3 Interpupillary Distance: 2.2 - 2.85 mm 56 - 72 mm Close Focus: 13.1 ft Diopter Adjustment Range: -2 - 2 dpt Weather Resistance: Fog Resistant Water Resistance Level: Waterproof Length: 8.98 in Weight: 32.54 oz Magnification Type: Fixed Eyecups Types: Turn-and-Slide Fogproof: Yes Brightness Index: 28.1 Features of Nikon Prostaff 7S 8x42 Waterproof Binocular Nikon's Advanced Optical System Ergonomic Rubber Armored Body Turn-and-Slide Rubber Eyecups Waterproof and Fogproof Package Contents: Nikon Prostaff 7S 8x42mm Waterproof Outdoor Binocular 16002 Nikon 16002: Prostaff 7S 8x42 Waterproof Binocular Black