Sony DSLR-A100K User Guide - Page 39

Using the shooting functions z How to use the AEL button in manual mode While you press and hold the AEL (AE Lock) button, the exposure determined by the meter is locked as the standard exposure (0.0Ev). Changing the composition on the LCD monitor and in the viewfinder while holding the AEL button causes the exposure within the spot metering circle to continually shift to match the movements and the display indicates the difference between the standard exposure determined by the meter and the exposure within the spot metering circle. The following illustrations show a case where the set exposure specified by the photographer is 1.0Ev more than the locked standard exposure determined by the meter. When the composition is changed in the viewfinder, the exposure within the spot metering circle is 0.7Ev more than the set exposure, thereby making it 1.7Ev more than the standard exposure determined by the meter. The exposure specified by the photographer Spot metering circle The exposure within the spot metering circle when you recompose your shot. Manual shift You can change the shutter speed and aperture value combination without changing the exposure in manual mode. Mode dial Control dial AEL (AE lock) button 1 Set the mode dial to M. 2 Select a shutter speed and aperture value (page 37). 3 Press and hold the AEL (AE lock) button and turn the control dial to select the desired shutter speed and aperture value combination. 39