Patent ID: 8570428

Claim:
A camera system comprising a camera body and an interchangeable lens, wherein the camera body comprises: an imaging unit that captures a subject image formed by the interchangeable lens in a predetermined capturing cycle to generate image data; a body controller that generates a synchronizing signal having a first cycle correlated with the capturing cycle; and a sending unit that sends the generated synchronizing signal to the interchangeable lens, the body controller further sending information indicating a second cycle to the interchangeable lens through the sending unit, the second cycle is larger than the first cycle and the second cycle is an integral multiple of the first cycle, and the interchangeable lens comprises: a focus lens; a drive unit that drives the focus lens along an optical axis; a receiving unit that receives the synchronizing signal and the information indicating the second cycle which are sent from the camera body; and a lens controller that controls an operation of the interchangeable lens, the lens controller controlling the drive unit to perform, in the second cycle, an autofocus control for capturing a moving image which periodically and minutely moves the focus lens back and forth along the optical axis, and performing other control in the first cycle in the interchangeable lens than the autofocus control.