Manfrotto 468MG RC2 Hydrostatic Ball Head
The compact, rectangular 200PL quick release plate system fits neatly under small-bodied still cameras up to SLR (even with tele lenses) or small medium format, or under small video cameras or spotting scopes. Its rubber pad gives a good grip without damaging the camera, and its angled sides ensure that it also fits perfectly and tightly into a wide range of Manfrotto heads.
A repositionable ratchet means that the locking lever's action will never be blocked either open or closed by interference with the camera body, tripod shoulder, simply pull the lever outwards and it's free to be positioned more comfortably without affecting the locking mehanism. Then you can continue tightening or loosening the knob.
This head features a secondary security lock so you can't accidentally release the plate (and camera) without meaning to. The lock stops the quick release lever from opening fully.