Camera system

A camera system comprising:

• an interchangeable lens;
• and
• a camera body;
• wherein the camera body comprises:
• an imaging portion that picks up a subject image and generates image data continuously by starting and ending an exposure in accordance with a first timing signal generated periodically, and
• a timing signal sending portion that generates a second timing signal periodically by capturing timings for starting and ending the exposure at the imaging portion, and sends the second timing signal to the interchangeable lens,
• the interchangeable lens comprises:
• a focus lens that moves forward and backward along an optical axis direction, thereby varying a focusing state of the subject image,
• a position detection portion that detects a position of the focus lens,
• a timing signal receiving portion that receives the second timing signal from the camera body, and
• a lens control portion that controls an operation of the interchangeable lens,
• and
• the lens control portion performs a control to detect the position of the focus lens in accordance with the second timing signal received from the camera body.