Powerful and durable, the GVM 12x50 HD Roof Prism Binoculars are made with compact BAK4 roof prisms and anti-reflection multicoated lens surfaces to boost their light-gathering ability and produce bright, clear high-contrast images with accurate color representation. These full-sized binoculars have large 50mm objectives that improve their light-gathering ability to extend their use into the predawn and dusk hours, when many animals are most active, or to look into heavily wooded or densely canopied areas. In more open areas, like fields and sporting events, the 12x50 HD have a wide viewing angle that allows you to see a large area without having to move your head from side to side very much.