Opteka GH1 Professional Heavy Duty Metal Gimbal Tripod Head with Arca-Swiss Standard Quick Release Plate (Supports up to 30lbs) Rugged design and construction, smooth, fast tracking horizontally and vertically Horizontal adjustment of the lens platform allows precise positioning to find the center of gravity of any size lens and camera system Calibrated scale for repeatable positioning of lenses Separate panning movement for total control Includes Arca-Swiss type standard quick release plate and built-in compass