Abstract: In a camera, a camera controller which maintains the camera in a state of maximum readiness while facilitating operator adjustment of the camera setting by means of a single control so as to allow a choice between depth of focus and the ability of the camera to freeze movement, said controller comprising a bias adjustor which provides a signal indicative of the desired relationship between f-number and shutter speed, and a processor connected to receive the said signal and a signal representative of the exposure value which in response to said signals determines the optimum shutter speed and f-number for the given conditions and bias setting and provides signals for setting the f-number and shutter speed in the camera. In one embodiment the said determination is effected by calculation by means of a microprocessor subroutine and in a second embodiment it is effected in a microprocessor subroutine by reference to tables of values stored in an ROM.