Canon POWERSHOT A60 User Manual page 96

3 Shoot the image.
The correct exposure has been set if the shutter speed and
aperture value show in white.
If the aperture value shows in red, the image is under
exposed (insufficient light) or overexposed (too much
light). Adjust the shutter speed using the left and right
buttons until the aperture value display turns to white.
The nature of CCD image sensors is such that noise in
the recorded image increases at slow shutter speeds.
This camera, however, applies special processing to
images shot at shutter speeds slower than 1.3 seconds
to eliminate the noise, thereby producing high-quality
images. Nevertheless, a certain amount of processing
time may be required before the next image can be shot.
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