EXPOSURE MODESThe F4 offers Manual (M), two Programmed Auto (PH, P),Shutter-Priority Auto (S) and Aperture-Priority Auto (A) Expo-sure modes.48Manual Exposure ModeIn the Manual Exposure mode, both shutter speed and aper-ture can be set manually to achieve the desired effect. Use fastshutter speeds to stop the action, slower speeds to createmotion effects or fuuy outlines. Manually setting the exposuremode also lets you control depth of field, either by softeningthe background so the main subject of the picture stands out,or by creating overall uniform sharpness.