The 10-30x50mm 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 | Barska | | 10-30x50mm Gladiator Zoom Binoculars | Black | Best Buy