A control apparatus includes a focus control unit configured to perform a focus control based on an image signal, a tilt control unit configured to control a tilt of an imaging plane based on the image signal, and a determination unit configured to determine a first evaluation area of the image signal used for the focus control and a second evaluation area of the image signal used for the tilt control in performing both the focus control and the tilt control. At least one processor or circuit is configured to perform a function of at least one of the units.