The Gitzo Series 3 Center Ball Head is constructed of magnesium and is designed to meet the high performance standards of all Gitzo tripods. It can accommodate dSLR cameras with large lenses. Its quick release plate is Arca compatible and also accepts Gitzo C-profile plates, allowing for either slide-in or snap-in mounting, and features a spring-assisted double pin safety locking system that prevents the camera from falling off when the locking knob is released. Weighing 1.9 lb, this ball head can support 46 lb. A large locking knob controls the movement of the ball, while a separate lock controls the 360° panning motion. In the center of the locking knob is a tension, or friction control dial that allows you adjust the tension of the ball to match the weight of your gear.