The Gladiator Zoom Binocular from Barska is designed for long-distance terrestrial and astronomical viewing. The variable magnification range of the binocular allows the viewer to scan a large field of view and then zoom in on the selected object for a closer and greater detailed look. A zoom thumb-lever for making quick and smooth magnification changes is featured. Fold-down eyecups are incorporated into the eyepieces for comfort viewing with or without eyeglasses. FeaturesLevered Zoom MagnificationTripod MountableFold Down Eyecups Technical Information Prism Type:Porro Eye Relief:10mm Exit Pupil Diameter: 2.8mm Field of View @ 1000 Yards (ft):199 Minimum Focus Distance (ft):16 Length:Not listed by manufacturer Weight:12.95 oz Waterproof:Not listed by manufacturer Warranty:Limited Lifetime Lens covers Included:Yes Lens Coating:Multi-Coated