The BC-139 Ball Head from Oben is a durable aluminum ball head that features an Arca-type compatible quick-release system. It has a large locking knob with a tension control screw to give you maximum control of the ball, and a separate knob for the 360° panning movement.
The BC-139's multiple knobs enable higher-precision adjustments to the head than are possible with single-lever heads. Taking panoramic photos is simple, for instance, because you can pan a specific number of degrees while keeping the head's tilt position locked. In fact, the BC-139 features degree markings around its circumference to aid in that task. A notch in the ball head allows you to quickly change between portrait and landscape orientation.
The included quick-release plate attaches to your camera via its standard 1/4"-20 screw, and is secured in place with an Arca-type clamp. A locking knob controls the opening and closing of the aluminum clamp simply and reliably. Two safety screws on the bottom of the plate help prevent your camera from accidentally being released when adjusting the plate fore and aft. One bubble level on the clamp, and another on the locking knob, both ensure that your camera will be level with the horizon.