Virtually every modern tripod has some kind of camera quick release system. This is a plate that you mount semi-permanently on the underside or your camera by using the screw thread. The release plate snaps in and can be released from the tripod head quickly.
From Tripod to Handheld
Release plates are a standard facility on the vast majority of tripod heads in the market today. Manufacturers such as Manfrotto, Vinten, Sachtler, Secced, Libec and many others offer this ideal solution for moving a camera from tripod to hand with speed and ease.
Some camera manufacturers also make tripod plates which are compatible with their larger cameras and camcorders, such as the Sony VCT-14 and the JVC KA551U. you can browse a wide selection of tripod camera release plates right now at Pro AV.