Bushnell PowerView binoculars offer the best of both worlds, combining contemporary styling and design with traditional Bushnell quality and durability. This particular PowerView binocular offers a 20x magnification--among the most powerful in its class--and a 50mm objective diameter. The multicoated optics, meanwhile, guarantee superior light transmission and brightness, helping you see just about any target, whether you're searching for birds or trying to get a better view of the football field. And users will love the patented InstaFocus focusing system, which holds your subject in sharp focus with a touch of the fingertip. Additional features include a porro prism system, a nonslip rubber armor housing that absorbs shock while providing a firm grip, a neck strap, and 9mm of eye relief. Specifications: Magnification: 20x Objective lens diameter: 50mm Size class: Standard Focus system: InstaFocus Prism system: Porro Prism glass: BK-7 Lens coating: Multi Field of view @ 1,000 yards: 170 feet Close focus distance: 45 feet Exit pupil: 2.5mm Eye relief: 9mm Eyecups: Fold down Waterproof/fogproof: No Adapts to tripod: Yes Weight: 30 ounces Warranty: Limited lifetime