Patent ID: 7477454

Claim:
A digital camera comprising: a first lens group disposed on an optical axis and configured to be related to operations concerned with changing overall relative magnification; a second lens group disposed on the optical axis and configured to be related to operations concerned with changing overall relative magnification and being retracted from the optical axis when a lens barrel is at a collapsed position; a first driving device configured to drive the first lens group; a second driving device configured to drive the second lens group; a photographing device disposed on the optical axis and configured to photograph a subject; a distance determining device configured to determine a distance to the subject; and a floating control device configured to control the first and second lens groups which are concerned with changing overall relative magnification, wherein the floating control device is configured to drive at least one of the first driving device and the second driving device based on distance information obtained from the distance determining device to execute a zoom operation of the first lens group and the second lens group in a manner to maintain an image quality balance between a central and a surrounding part of the image of the subject or in a manner to maintain an image quality balance between a radial direction and a concentric direction of the image of the subject.