Patent ID: 6912358

Claim:
A camera system comprising: a focus lens group that executes a focal point adjustment by moving along an optical axis; a drive unit that drives the focus lens group; a focus lens group detection device that detects a position of the focus lens group along the optical axis; a position storage operation unit operated to store in memory the position of the focus lens group as a preset position; a lens group position storage unit at which at least the position of the focus lens group is stored when an instruction to store the preset position is issued by the position storage operation unit; a position reset operation unit through which an instruction to reset the focus lens group to the preset position stored in memory in response to an operation of the position storage operation unit is issued; and a defocus prevention unit that executes an operation to prevent defocusing when a failure in focusing on a subject is predicted to occur if the focus lens group is reset to the preset position stored in memory through the operation of the position storage operation unit.