Patent ID: 8614762

Claim:
An auto-focusing apparatus comprising: a focus lens; a driving unit that drives the focus lens; an imaging device that receives an optical signal that has passed through the focus lens and generates an image signal; a focus evaluation value obtaining unit that obtains focus evaluation values related to a focusing state from the image signal; a target position obtaining unit that obtains a target position of the focus lens corresponding to a peak of the focus evaluation values; a compensation driving controller that controls backlash compensation driving of the focus lens when the focus lens is moved to the target position of the focus lens; and an exposure controller that performs imaging by using the imaging device after an exposure preparation control operation is performed, wherein the compensation driving controller controls backlash compensation driving of the focus lens while the exposure preparation operation is being performed, and wherein the exposure preparation control operation is at least one of: erasing a display of a captured image, closing a shutter, and adjusting a diaphragm.