Patent ID: 8305483

Claim:
An imaging device comprising: an image pickup device having an arrangement of photoelectric converting units, the arrangement in which a plurality of pairs of photoelectric converting units are arranged along a predetermined direction, each pair of photoelectric converting units receiving light beams of a subject passing through an exit pupil of a shooting optical system, wherein each photoelectric converting unit in the same pair of photoelectric converting units receives the light beams passing through a different portion of the exit pupil than the other photoelectric converting unit in the same pair of photoelectric converting units; and focus detecting means for performing focus detection of a phase-difference detecting technique according to data obtained from the pair of photoelectric converting units in the arrangement of the photoelectric converting units; wherein due to an error in manufacturing the image pickup device, a relative positional shift occurs from a normalized position where the light beams of the subject are received by the pair of photoelectric converting units with a predetermined light-receiving balance, and wherein the focus detecting means includes: correcting means for correcting the data according to a correction amount corresponding to a positional shift amount from the normalized position, and means for performing focus detection of the phase-difference detecting technique according to the data corrected by the correcting means.