The Bushnell Engage is backed with the all-weather assurance of Bushnell&';s exclusive EXO Barrier lens coating repels water, debris, oil and fog. Fully multi-coated optics offer maximum brightness and clarity and they&';re housed in a lightweight and rugged magnesium chassis. Applied to the prisms, PC-3 Phase Coating, enhances resolution and contrast. Features adjustable diopter, twist up eyecups and is tripod compatible.