Patent ID: 8654228

Claim:
An imaging apparatus comprising: an optical system configured to collect subject light; an imaging device having an electronic front curtain function, configured to receive the subject light to generate an image signal; a data storage unit configured to store an exit pupil distance of the optical system and a correction amount of the exit pupil distance; a mechanical shutter capable of cutting off the subject light passing through the optical system to the imaging device; and a correction unit configured to obtain the exit pupil distance of the optical system and the correction amount of the exit pupil distance from the data storage unit, obtain a corrected exit pupil distance using the obtained exit pupil distance of the optical system and correction amount of the exit pupil distance, and correct brightness unevenness of the image signal based on the corrected exit pupil distance; wherein the correction amount of the exit pupil distance is a correction amount that nonlinearly changes according to a vignetting of the optical system; and wherein the exit pupil distance of the optical system is a value expressed by using an inverse number of a value of an exit pupil distance of an optical system.