Nikon Action EX Extreme 7 x 50 Designed to appeal to those who value tough construction and reliable optical performance under even the most extreme conditions. All-metal chassis with lens fittings housed in a tough, lightweight polycarbonate body shell. Nitrogen-filled and O-ring sealed for total waterproof, fogproof and shockproof performance. The binocular body is ergonomically shaped, tripod adaptable and rubber coated for a non-slip grip. Unique, click-stop eyecup design not only delivers long eye relief, but also allows for variable eye relief that is customizable to the user's own eyes & eyeglasses. Central focus with diopter control to correct for normal right/left eye vision imbalance. Apparent Angles of View that are at,