Waterproof and fog-free with nitrogen gas filling.
The 10x50 Action Extreme ATB Binocular from Nikon is a general purpose optic that offers a weather-sealed housing and slip-resistant handling. Additionally Action Extreme ATB binoculars are equipped with a fully multicoated optical path that displays a 59.2° apparent viewing angle. Nikon's Eco-Glass optics are made of environmentally-friendly lenses and prisms that don't contain lead or arsenic. Complementing the image quality and nitrogen-filled housing are Turn-and-Slide eyecups and a 17mm eye relief allowing the viewer to set a comfortable viewing distance even while wearing eyeglasses.
Eco-Glass Optics: Lead and Arsenic-Free BAK4 Porro Prisms Fully Multicoated Optics Wide Angle Viewing Nitrogen-Filled Fogproof / Waterproof Turn-and-Slide Rubber Eyecups 17mm Eye Relief Rubber Armored Housing
Prism Type: Porro Magnification: 10 x Objective Diameter: 50 mm Angle of View (Actual): 6.5 degrees FOV at 1000 yds: 112 m Close Focusing Distance: 7 m Exit Pupil: 5 mm Relative Brightness: 25 Eye Relief: 17.2 mm Size (Length x Width): 178 x 196 mm Weight: 1020 g