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A ball head is a metal or plastic apparatus placed on top of a
A ball head is a metal or plastic apparatus placed on top of a tripod
A tripod is a portable three-legged frame or stand, used as a platform for supporting the weight and maintaining the stability of some other object. The three-legged (triangular stance) design provides good stability against gravitational loads ...
that increases stability and provides faster, more accurate rotation of the camera for the photographer. They are lighter than traditional three-way pan-tilt tripod heads. With fewer parts and a much simpler mechanism, ball heads are usually preferred by more advanced photographers. They are usually quite expensive most professional-quality heads are more than US$200, although some heads are available for less than $100.
See also
*Tripod head
A tripod head is the part of a tripod system that attaches the supported device (such as a camera) to the tripod legs, and allows the orientation of the device to be manipulated or locked down. Modular or stand-alone tripod heads can be used on ...
References
{{Photo-stub Photography equipment