The 15-80x28 High-Power Zoom Binoculars from Vivitar are a high-magnification zoom optic useful for long-range observations. These binoculars feature a closed-bridge body configuration and a reverse Porro prism design as well as a magnification range that is unique to handheld optics. Multiple layers of anti-reflective lens coating enhance the image quality of these binoculars' 1.8-0.65° angle of view.