FEATURES All-round monocular for nature, Travel, astronomy Magnification: 12 times Lens diameter: 50 mm Prism made from premium BaK-4 glass material Full multi-layer coating on optical surfaces Twist-up eyecup Waterproof Viking Monocular-suitable for use with or without glasses With this monocular, you can observe the surroundings without taking your glasses off. Simply fold down the twist-up eyecup to achieve the perfect distance between your eyes and the ocular lens. The Viking 12×50 monocular is extremely versatile and easy to use. 50mm objective lens will give you a bright image, Bak 4 prisms and fully multi coated. 12-month Warranty