The 10-30x50mm Gladiator Zoom Binoculars from Barska are designed for long-distance terrestrial and astronomical viewing. The powerful variable magnification range allows the viewer to scan a large field of view and then zoom in on the selected object to make detailed observations. An ergonomically-placed zoom lever allows users to make fast magnification changes while viewing through the eyepieces with a simple movement of their right index or middle finger. The large objectives and ruby multi-coatings draw in copious amounts of light to push the low-light capabilities of the optic, while a large exit pupil at low magnification ensures complete coverage of the user's pupil when it gets fully dilated as light fades. Fold-down eyecups enable comfortable viewing with or without eyewear, and rubber armoring provide a slip-resistant grip. For long-duration glassing sessions or when keeping the binoculars steady at high magnifications, they can be tripod mounted using an optional adapter. This version of the Gladiator comes with an adjustable neck strap and carrying case in convenient clamshell packaging.