for control of aperture

Control of exposure by setting shutters, diaphragms or filters, separately or conjointly > Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device > Analogue circuits > for control of aperture

Control of exposure by setting shutters, diaphragms or filters, separately or conjointly (control of exposure in television cameras by means of circuitry influencing the optical part of the camera H04N23/75) > Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device > Analogue circuits > for control of aperture