These black Leupold BX-3 Mojave 10x50mm binoculars feature proprietary nitrogen fill process, synergy build, open bridge roof prism design, smooth diopter focus, cold mirror coated prisms, twist up eyecups, rugged waterproof armor, slim in-line design, phase coated lenses, BAK 4 prisms, fully multi-coated lenses, and a close focus distance of 10 feet.