PROGRAM - P
Program exposure is set with the exposure-mode dial (p. 50). The program AE uses luminance and focal-length information to calculate exposures. This allows the photographer to shoot without worrying about exposure settings. The shutter speed and aperture values of the exposure are displayed on the monitors. If the brightness level of the scene is outside the exposure control range of the camera, the shutter-speed and aperture displays turn red on the monitors.
PROGRAM SHIFT - PS/PA
Program-shift function allows adjustment to the shutter-speed/aperture combination determined by the camera. The built-in flash cannot be used with program shift. The camera gives priority to the flash exposure; once the flash is raised, any changes made with program shift are canceled.
As described in the basic recording operation (p. 30), press the shutter-release button partway down until the shutter speed and aperture value are displayed.
Turn the control dial to change the shutter speed (Ps).
Turn the dial while pressing the shift button to change the aperture (PA).
Each shutter speed and aperture combination gives the equivalent exposure. The values are shifted in 0.3Ev or 1/3 stop increments. If the lighting changes, the shifted value remains fixed and the other display changes to compensate for the required exposure.