Bushnell 141042C Powerview 10X42mm Roof Prism Clam Binocular Accessory Bundle SIZE: 10xmagnification with 42-millimeter objective lens | Standard size with high magnification for long-range observing OPTICS: Fully multi-coated optics deliver bright, high-contrast images and guarantee superior light transmission and brightness PRISM: BaK-7 prisms for high image resolution and clarity | Roof prism system VIEW: Easy-to-use center focus system | 288-foot field of view at 1,000 yards CONSTRUCTION: Non-slip black rubber armor absorbs shock while providing a firm grip