A control apparatus comprising: detection means configured to detect an object area in an image captured by an image capturing apparatus; dividing means configured to divide the image into a plurality of divided areas (701, 702, 703); and first calculation means configured to calculate a luminance difference as a difference between a luminance value of the object area and a luminance value of each of the divided areas after the image capturing apparatus executes exposure control by setting the object area as a photometric area; characterized by: second calculation means configured to calculate a first amount of change as a difference between luminance values of the object area before and after the image capturing apparatus executes the exposure control and a second amount of change as a difference between luminance values of the divided area before and after the image capturing apparatus executes the exposure control; and determination means configured to determine, from among the plurality of divided areas, a plurality of candidate areas wherein a difference between the first amount of change and the second amount of change is a predetermined value (Th) or less, and to select, based on the luminance difference, from all of the candidate areas, a photometric area which is used when the image capturing apparatus executes exposure control. detection means configured to detect an object area in an image captured by an image capturing apparatus; dividing means configured to divide the image into a plurality of divided areas (701, 702, 703); and first calculation means configured to calculate a luminance difference as a difference between a luminance value of the object area and a luminance value of each of the divided areas after the image capturing apparatus executes exposure control by setting the object area as a photometric area; characterized by: second calculation means configured to calculate a first amount of change as a difference between luminance values of the object area before and after the image capturing apparatus executes the exposure control and a second amount of change as a difference between luminance values of the divided area before and after the image capturing apparatus executes the exposure control; and determination means configured to determine, from among the plurality of divided areas, a plurality of candidate areas wherein a difference between the first amount of change and the second amount of change is a predetermined value (Th) or less, and to select, based on the luminance difference, from all of the candidate areas, a photometric area which is used when the image capturing apparatus executes exposure control. second calculation means configured to calculate a first amount of change as a difference between luminance values of the object area before and after the image capturing apparatus executes the exposure control and a second amount of change as a difference between luminance values of the divided area before and after the image capturing apparatus executes the exposure control; and determination means configured to determine, from among the plurality of divided areas, a plurality of candidate areas wherein a difference between the first amount of change and the second amount of change is a predetermined value (Th) or less, and to select, based on the luminance difference, from all of the candidate areas, a photometric area which is used when the image capturing apparatus executes exposure control.