Abstract: This invention is directed to the control of a camera shutter mechanism by means of a pair of resilient control members. A first control member in the form of a fast acting spring is attached to the camera base member and, with operation initiates at a relatively low speed to provide an initial movement of the shutter control and overcomes the inertia of the mechanism and initiates its movement from a state of rest. This effect is preferably followed by a second effect provided by a second driving spring to achieve a substantially uniform movement of the mass of the mechanism first actuated, with the second driving spring acting continuously, following the initial operation, upon the shutter mechanism after a change from a rest position to one of movement.