The 10-30x60mm Gladiator Zoom binocular has BK-7 porro prisms and tinted ruby colored lenses to help lessen ultra-violet glare. Zoom magnification, multicoated optics, large objective, shock-absorbing rubber armor, and tripod-adaptable fittings for a steady view, contribute to a binocular that's ideal for all outdoor activities and sporting events. The 10-30x60mm 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.