Image capturing apparatus, control method therefor, and program

An image capturing apparatus comprising:

• an image capturing unit which converts, into an image signal, an object image formed by an imaging optical system including a zoom lens;
• a motion vector detection unit which detects a motion vector quantity representing a shift amount between images from image signals successively obtained by said image capturing unit;
• an angle conversion unit which converts the motion vector quantity detected by said motion vector detection unit into an angular displacement amount between the images on the basis of a zoom position of the zoom lens;
• a shift angle calculation unit which calculates a shift angle from an optical axis of the imaging optical system by calculating the angular displacement amount obtained by said angle conversion unit;
• a shift amount conversion unit which converts the shift angle calculated by said shift angle calculation unit into a shift amount on an image plane of said image capturing unit on the basis of the zoom position of the zoom lens;
• and
• a correction unit which corrects a shift on the basis of the shift amount on the image plane.