Aputure电池控为教20D的，30D的，40D的，50D

Introduction The Power Grip is powerful and versatile. Besides doubling the times of shots of DSLR cameras by only a single charge. the Power Grip also offers the options of a secondary shutter release button for vertical shooting and other professional functional buttons for special camera operation. It comes with the tripod mounting thread as well to stabilize the camera onto tripod during shoots in special situation. Features . Holding two BP-511A batteries and doubling the battery capacity of your camera. . Vertical shutter release button on the Battery Grip making shoots with the camera in a vertical position. . Coming with several other professional functional buttons for much convenient for use.