Featuring ashperical multicoated lenses and BaK4 high index Porro style prisms - Turn-and-slide rubber eyecups - Ergonomic lightweight design - Durable and protective rubber-armored coating - Manufactured responsibly with lead and arsenic-free Eco-Glass - Focusing System: Central Focus - Magnification: 10 x - Objective Diameter: 50 mm - Angular Field of View (Real): 6.5 - Angular Field of View (Apparent): 59.2 - FOV at 1000 yds: 341 ft - Close Focus Distance: 23 ft - Exit Pupil: 5 mm - Relative Brightness: 25 - Eye Relief: 11.8 mm - Size (Length x Width): 7 x 7.8 in - Weight: 31.7 oz - Prism: Porro