Ball and three-way heads
Ball heads tend to be faster, as there’s only one main locking knob for all planes of adjustment, but three-way heads offer more control for fine-tuning.
Adjustable friction damper
Enables greater friction to be applied on a ball head when using heavier loads, so the camera doesn’t fall to one side when the locking mechanism is released.
Sometimes featured on ball heads, so that the angle of tilt can remain locked but the camera can be panned horizontally, or swivelled through increments.