Patent ID: 8432480

Claim:
A camera body to which an interchangeable lens is mountable, the interchangeable lens including: an optical system operable to collect light from a subject to form a subject image; a driving unit operable to drive a diaphragm for adjusting an amount of light of the subject image to be collected by the optical system; and a lens transmitting unit operable to transmit, to the camera body, speed information relating to a settable speed of change in the light amount which is changed by the diaphragm driven by the driving unit; the camera body comprising: a receiving unit operable to receive the speed information; a first controller unit operable to select a shooting mode from a moving image shooting mode for shooting a moving image and a still image shooting mode for shooting a still image; a second controller unit capable of setting whether or not to operate in a silent mode which is provided for a situation where a drive sound of the drive unit is desired to be at a low level during the moving image shooting mode; a third controller unit operable to generate a control signal for changing the light amount which is changed by the driven diaphragm, at a constant speed based on the speed information, when the moving image shooting mode is selected by the first controller unit and the silent mode is not set by the second controller unit; and a body transmitting unit operable to transmit the generated control signal to the interchangeable lens.