The third method of controlling the tonal range of a shot is adjusting the lens or camera. This type of control is less selective than reflective or incident. As the camera’s shutter or the lens’ f-stop is adjusted, the entire picture will get brighter or darker. Exposure control can’t selectively make a shirt lighter or a wall darker without affecting everything else in the shot. The tonal range of the normal exposure is given an overall shift by changing the f-stop.