Abstract: An adapter, for use with items such as cameras and camera accessories, the adapter having a lower portion and an upper portion, the lower portion comprising means adapted to receive and engage with a clamp stud of an item to be connected to the adapter, the upper portion comprising a platform assembly comprising means adapted to attach to another item above the adapter, wherein the lower portion comprises a stud catch mechanism, and wherein the stud catch mechanism is adapted to be connected to the said clamp stud when the stud catch mechanism is in an engaged state and to be not connected to the said clamp stud when the stud catch mechanism is in a disengaged state, the stud catch mechanism having one or more stud catch plates adapted to be moveable into and away from the recess of the clamp stud in use.

Abstract: A releasable connection arrangement, suitable for releasably connecting two items, wherein a base portion comprises a clamp stud and a head portion comprises a stud catch mechanism, and wherein the clamp stud and stud catch mechanism are adapted to be connected to one another when the stud catch mechanism is in an engaged state and to be not connected to one another when the stud catch mechanism is in a disengaged state, the stud catch mechanism providing a substantially frictional connection between the stud catch mechanism and the stud catch when the stud catch mechanism is in the engaged state, the stud catch mechanism comprising a stud catch plate adapted to be moveable and a stud release lever adapted to move the stud catch plate axially towards and away from the clamp stud in use, so that the stud catch plate can engage and disengage the clamp stud in use.