A camera system (1) includes an interchangeable lens (200) and a camera body (100). The camera body (100) includes a body controller (140) configured to generate a command, and a sending unit (150) configured to send the generated command to the interchangeable lens. The interchangeable lens (200) includes a movable member (230, 260), a driving unit (233, 261) configured to drive the movable member, a receiving unit (250) configured to receive a command from the camera body, and a lens controller (240) configured to control the driving unit according to the received command. Further, a prediction unit (140, 240) is provided in either one of the camera body and the interchangeable lens, which predicts whether an operation of the driving unit of the interchangeable lens according to the received command will be completed within a predetermined time.