Incredible views at your fingertips. For big country hunting, the Vortex Viper Spotting Scope features HD extra-low dispersion glass for impressive resolution, XR multi-coated lenses for maximum brightness, dielectric prism coatings, porro prism, ArmorTek scratch-resistant coating, adjustable eyecup, dual focus, built-in sunshade, rotating tripod ring, and picatinny rail.