Camera system, camera body, and interchangeable lens

Abstract

A camera system includes an interchangeable lens and a camera body. A body controller in the camera body performs control to transmit a timing signal and a drive information signal to the interchangeable lens. A lens controller in the interchangeable lens controls drive of a focus lens based on the drive information signal and the timing signal which are received from the camera body. The drive information signal includes information of a driving time which is a period from a start of driving the focus lens until an end of driving the focus lens.

1 . A camera system comprising an interchangeable lens and a camera body,
 the interchangeable lens comprising:
 a focus lens operable to move back and forth in an optical axis direction to change a focus status of a subject image; 
 a driver operable to drive the focus lens; and 
   a lens controller operable to control an operation of the interchangeable lens under control of the camera body,   the camera body comprising:
 an imaging unit operable to image a subject at a predetermined frame rate to generate image data; 
 a drive signal transmission unit operable to transmit a drive information signal for instructing an amount of movement of the focus lens; and 
 a body controller operable to control an operation of the camera body, 
   wherein
 the lens controller controls drive of the focus lens based on the drive information signal received from the camera body, and 
 when the focus lens is not moved by the instructed amount of movement, the lens controller transmits information indicating that the focus lens is not moved by the instructed amount of movement to the body controller.