A control apparatus includes a control unit configured to control a cycle from a first irradiation start timing to a second irradiation start timing to be shorter than a cycle of each of first and second picture periods. The first irradiation start timing is a timing at which a light source device starts radiating pulsed illumination light in the first picture period in which an image pickup device performs reading. The second irradiation start timing is a timing at which the light source device starts radiating the illumination light in the second picture period succeeding the first picture period and having the same cycle as the first picture period.
