The Konus Basic Series is an outstanding binocular line for the value conscious customer. Designed with high quality rubber armoring to absorb shocks and Ruby Coated optics. For a crisp, glare-free image. The Roof Prism compacts have central focusing, include a case, and instructions.Specifications:- Central focusing- Field of view at 1000m/1000yds: 80m/240ft.- Exit pupil diameter: 2.5mm.- Weight: 250gr/8.75oz.