An image capturing apparatus reads out a signal from pixels of an image sensor, sets a region in which a plurality of signals having different viewpoints are read out from each pixel of the image sensor, acquires first depth information for detecting an object using a signal read out from a first signal readout region, acquires evaluation information for detecting a focus state of an object using a read signal, and controls a signal readout amount of the first signal readout region based on the focus state determined based on the evaluation information.