Image capturing apparatus and control method for the same

A control method for an image capturing apparatus comprising an image sensor that includes a plurality of photoelectric conversion portions that correspond to each of a plurality of microlenses, and is configured to perform photoelectric conversion on a light flux that enters via an imaging optical system including an image stabilization optical system, and a refocus unit configured to perform refocus processing based on output from the image sensor, the control method comprising:

• determining, based on a shake signal, a drive amount for the image stabilization optical system for correcting the shake, within a range in which variation in defocus amounts at positions of the image sensor, which occurs due to the image stabilization optical system being driven, falls within a range in which a defocus amount is movable by the refocus unit;
• and
• driving the image stabilization optical system based on the determined drive amount.

A computer-readable storage medium storing a program for causing a computer for an image capturing apparatus, comprising an image sensor that includes a plurality of photoelectric conversion portions that correspond to each of a plurality of microlenses, and is configured to perform photoelectric conversion on a light flux that enters via an imaging optical system including an image stabilization optical system, and a refocus unit configured to perform refocus processing based on output from the image sensor, to execute the steps of the control method comprising:

• determining, based on a shake signal, a drive amount for the image stabilization optical system for correcting the shake, within a range in which variation in defocus amounts at positions of the image sensor, which occurs due to the image stabilization optical system being driven, falls within a range in which a defocus amount is movable by the refocus unit;
• and
• driving the image stabilization optical system based on the determined drive amount.