When weight and size are factors, the nimble ergonomics and sheer versatility of the Eterna Midsize can make the difference between enduring your trip, and enjoying it. Bright 32 mm objective diameter, Emerald Fire. full multi-coating and BaK 4 prism glass deliver superb image quality under a wide range of conditions. Multi-step eye relief keeps things comfortable with or without eyeglasses. Features:BaK-4 prism glass. State-of-the-art phase coating. AL reflective coating. Emerald Fire. full multi-coating. Multi-step eye relief system. Waterproof. Nitrogen filled/fogproof. Ergonomic body armor.Power: 10X. Objective diameter: 32mm. Eye relief: 15mm. Exit pupil: 3.2mm. Field of View: 315 ft @ 1,000 yds. Eye cup type: twist up. Frame / body material: polymer. Close focus : 4 ft. Includes: Bino Glove and neoprene neck strap.