Imaging apparatus and method for controlling same

An imaging apparatus comprising:

• an imaging element comprising a plurality of pixels each having a first photoelectric conversion unit configured to output a left-eye image by photoelectrically converting a light flux having passed through a region of an exit pupil of an imaging optical system and a second photoelectric conversion unit configured to output a right-eye image by photoelectrically converting a light flux having passed through a region different from the region of the exit pupil;
• a first image generation unit configured to generate a composite image by adding the left-eye image output by the first photoelectric conversion unit and the right-eye image output by the second photoelectric conversion unit for each pixel;
• a parallax calculation unit configured to calculate a positional shift amount of the left-eye image/right-eye image relative to a position of the generated composite image as a parallax amount and store the calculated parallax amount in a storage unit;
• and
• a second image generation unit configured to generate a left-eye image and a right-eye image to be reproduced by shifting an object included in the generated composite image to a position corresponding to the parallax amount stored in the storage unit.