Bushnell 8-16 x 40 Zoom Powerview Roof Prism Binocular Quality optics with stunning HD clarity 100% quality materials used and tested extensively Beautiful design and durability built to last Standard-sized variable power binoculars with 40-millimeter objective lenses and roof prism system 8 to 16x zoom magnification offers both wide angle overviews and detailed close ups BaK-7 prisms and multi-coated optics for high-quality resolution and image clarity Rugged, shock-absorbing, non-slip rubber armor; center focus knob Limited lifetime warranty