The cover contains a clear plastic window through which you can access the auto focus and distance scale. There's also a handy orientation hole that aligns with the red dot on the lens for easy mounting even with the cover installed. The Digital Camo is an advanced computer generated camouflage pattern. It is modeled after the U.S. Army's standard-issue ACU pattern, which provides a pixelated pattern that maximizes visual break up. The pattern, constructed from small rectangular pixels of color, mimics naturally occurring dappled textures and rough boundaries.