Canon PowerShot S1 IS User Manual page 135

Problem
Subject in recorded Insufficient light for shooting.
image is too dark
Subject dark in comparison to the background.
Subject too far for flash to reach.
Subject recorded in Subject too close causing flash to be too bright. Adjust the flash output with the flash exposure compensation
image is too bright
Subject bright in comparison to the background.
Light shining directly on subject or reflected off
subject into camera.
Flash set to On.
A vertical bar of light Subject too bright
(red, purple) appears on
the LCD monitor/in the
viewfinder
Cause
Set the built-in flash to on.
function (p. 89).
Change the shooting angle.
Set the flash to Auto or Off.
This is a normal occurrence in devices containing CCDs and
does not constitute a malfunction. (This red bar of ight will not be
recorded when shooting still photos, but it will be recorded when
shooting movies.)
Solution
Set the exposure compensation to a positive (+) setting.
Use the AE lock or spot metering function.
See Locking the Exposure Setting (AE Lock) (p. 86)
and Switching between Light Metering Modes (p. 76).
To use the built-in flash, shoot within the following ranges:
Auto ISO: 1.0 to 4.2 m (3.3 to 14 ft.) of the subject at the
maximum wide angle and within 1.0 to 3.0 m (3.3 to 9.8 ft.) at
the maximum telephoto setting.
ISO 100 equivalent: 1.0 to 3.8 m (3.3 to 12 ft.) of the subject
at the maximum wide angle and within 1.0 to 2.5 m (3.3 to
8.2 ft.) at the maximum telephoto setting.
Raise the ISO sensitivity and then shoot.
See Changing the ISO Speed (p. 81).
Set the exposure compensation to a negative (-) setting.
Use the AE lock or spot metering function.
See Locking the Exposure Setting (AE Lock) (p. 86)
and Switching between Light Metering Modes (p. 76).
Appendix 133