Steiner 20x80 M2080 Military Binocular puts you at an effective distance of less than 100 yards from one mile-distant targets or other objects. The 80-mm objective lenses, combined with Steiner's legendary optics, deliver far superior low-light performance. These binoculars were developed for military and border patrol applications and are mil. spec. tough: totally waterproof, shock resistant, and rubber armored. Tripod mount is included, but these models are light enough to be hand held. Depth of field is about 80 yards out to infinity once focused for your eyes. Field 174165 Ft/1000 yards, eye relief 15mm. By Steiner.