Velbon QHD-71Q Heavy Duty Magnesium Ball Socket Head with it's built-in quick release mechanism. is compact, and lightweight as the ballhead is manufactured from magnesium alloy. The magnesium construction allows for a 20% weight reduction in weight over traditional metals, while it still maintains the same quality and stability. The one-touch locking/release knob controls both the panning and ball movement at the same time. This head supports a load up to 7.5kg and is ideal for professional DSLR with super telephoto lens or professional HDV camera.