The DDH-06 Panoramic Panning Clamp from Sunwayfoto is an Arca-type compatible panning clamp that can attach directly to your tripod, or on top of your ball head. When it is mounted directly on a tripod it is a simple panning head. With an Arca-type plate (not included), the DDH-06 can be mounted on an Arca-type compatible ball head that turns the ball head into a leveling base, allowing you to pan your camera on axis with the horizon. The clamp rotates a full 360°, and has laser engraved index markings, allowing you to precisely pan your camera between shots.
Grooves in the clamp act as safety stops so that your plate will not slide out of the clamp while you adjust your camera fore and aft.
A long-stemmed clamp locking-knob allows you to use wide plates or cameras and still be able to access the knob.
A bull's-eye bubble level allows you to level your camera on both the horizontal and vertical axes.