Bushnell Spectator Sport 10x40 BinocularsSPECTATOR SPORT BINOCULARS, 10X40MM #BS11040 Classic roof prism design combines with 10x magnification for optimal viewing experience. PermaFocus Technology Keeps distant objects permanently in focus, eliminating the need for constant adjustment. Nitrogen Purged Fog Proofing Nitrogen inside the scope ensures interior optical surfaces wont fog due to humidity or rapid temperature change. Multi Coated Optics Multiple layers of coatings on all lens