Camera system, camera body and interchangeable lens

An interchangeable lens mountable to a camera body comprising:

• a movable member;
• a driving unit configured to drive the movable member;
• a receiving unit configured to receive a synchronizing signal and a command from the camera body;
• a lens controller configured to control the driving unit according to the received command based on the received synchronizing signal;
• a prediction unit configured to generate prediction information while the driving unit drives the movable member, the prediction information indicating whether an operation of the driving unit, which is performed according to the received command, will be completed within a predetermined time;
• and
• a sending unit configured to send the prediction information to the camera body.

A camera system comprising an interchangeable lens and a camera body,

• the camera body comprising:
• a body controller configured to generate a synchronizing signal and a command;
• and
• a sending unit configured to send the generated synchronizing signal and the command to the interchangeable lens,
• the interchangeable lens comprising:
• a movable member;
• a driving unit configured to drive the movable member;
• a receiving unit configured to receive the synchronizing signal and the command from the camera body;
• a lens controller configured to control the driving unit according to the received command based on the received synchronizing signal;
• and
• a prediction unit configured to generate prediction information while the driving unit drives the movable member, the prediction information indicating whether an operation of the driving unit, which is performed according to the received command, will be completed within a predetermined time;
• wherein the lens controller sends the prediction information generated by the prediction unit to the camera body, and
• the prediction information is information indicating a number of cycles of the synchronizing signal required to complete the operation of the driving unit which is performed according to the received command.