A control apparatus for remotely controlling one of adjusting functions of an image capturing apparatus, including contrast, gamma, sharpness, and aperture. The control apparatus transmits to the image capture apparatus a first command requesting a current value of the adjusting function of the image capture apparatus and a second command requesting a remotely controllable range of the adjusting function. The control apparatus detects the current value of the adjusting function from a response to the first command and a remotely controllable range of the adjusting function from a response to the second command. The control apparatus then displays the current value and the remotely controllable range of the adjusting function on a display unit of the control apparatus.