Vanguard Endeavor HD 82S Straight Eyepiece Spotting Scope Extra-low Dispersion glass (ED) for accurate color rendition and minimal fringing Bak4 phase-coated prism and fully multi-coated lenses Dual focus wheel for fine and course adjustment 100% waterproof and fogproof Rubber armored magnesium body with built in sunshield Detachable straight eyepiece with soft, comfortable rubber eyecup and long eye relief Premium Lifetime Warranty