3. A - APERTURE PRIORITY AE
When you set the desired aperture value, the camera will select the
appropriate shutter speed. You can make the depth-of field deeper or
shallower by selecting the aperture value.
Set the mode dial to A position.
When you press the shutter button "Halfway", the shutter speed and
aperture value are displayed in the viewfinder and on the LCD panel.
Turn the A-dial until the desired aperture value appears. The camera
will select and indicate the appropriate shutter speed.
If the appropriate shutter speed is out the range of suitable
combinations due to the subject being too bright or too dark, the shutter
speed indicator will blink.
If the subject is too bright, set the aperture value to a smaller one (larger
number), or if the subject is too dark, set the aperture value to a wider
one (smaller number) until the indicator stops blinking.