Patent ID: 7742695

Claim:
A camera system for driving a diaphragm using a stepping motor including first and second coils and capable of 2-phase driving, comprising: an image sensor; a diaphragm position detection unit configured to detect the diaphragm position; a display unit configured to display a series of images sequentially read from the image sensor; a live view control unit configured to display image signals sequentially read from an image sensor by the display unit; a control unit configured to energize at least one of the first and second coils to drive the diaphragm when the display unit displays the images, and to cut off the energization of the coil after the diaphragm is driven to a first position according to a first diaphragm value; and a correction unit configured to correct a light metering value obtained when the diaphragm position detection unit detects that the diaphragm position has changed to a second diaphragm position after the energization of the coil is cut off by the control unit.