Bushnell Powerview Wide Angle Binocular, Porro Prism Glass BK-7 Quality optics with stunning HD clarity 100% quality materials used and tested extensively Beautiful design and durability built to last Wide-angle, Perma Focus binoculars with 10x magnification and 50-millimeter objective lenses Fixed-focus operation dials in focus at any distance automatically Fully coated optics for improved clarity and light transmission Ergonomic rubber housing for a secure grip and shock resistance Designed for sporting events and nature observation; limited lifetime warranty