Patent ID: 8687080

Claim:
An image pickup apparatus comprising: an image pickup element which includes a plurality of imaging pixels configured to perform a photoelectric conversion of an image formed by a light beam from an image pickup optical system and a plurality of focus detection pixels configured to perform a photoelectric conversion of an image formed by a divided light beam of the light beam from the image pickup optical system; a focus detector configured to perform a focus detection of the image pickup optical system based on an output of the focus detection pixels; a vignetting determination portion configured to determine whether or not vignetting is generated in the focus detection pixels; an aperture controller configured to perform a restriction so that an aperture value of the image pickup optical system is equal to or less than a predetermined value in a first mode where the focus detector performs the focus detection and if the vignetting determination portion determines that vignetting is generated in the focus detection pixels, the restriction being not performed in a second mode that is different from the first mode; and an exposure controller configured to adjust an exposure condition in accordance with the aperture value restricted by the aperture controller.