Canon Speedlite 470EX-AI Instruction Manual page 99

Pictures are underexposed or overexposed.
If the main subject looks very dark or very bright, set flash exposure
compensation (p.30).
If there is a highly reflective object in the picture, use FE lock (p.31).
With high-speed sync, the faster the shutter speed, the lower the
guide number becomes. Move closer to the subject (p.32).
The bottom of the picture looks dark.
Move at least 0.7 m/2.3 ft. away from the subject.
Remove the lens hood if attached.
The picture periphery looks dark.
Set the flash coverage to <L> (automatic setting, p.34).
When manually setting the flash coverage, set a flash coverage
wider than the shooting angle of view (p.34).
Make sure C.Fn-21-1 is not set (p.87).
The picture is very blurred.
When the shooting mode is set to the <f> aperture-priority AE
mode and the scene is dark, slow sync is enabled automatically (the
shutter speed becomes slower). Use a tripod, or set the shooting
mode to the <d> program AE or fully automatic mode (p.25). Note
that you can also set the sync speed in [Flash sync. speed in Av
mode] (p.68).
Troubleshooting Guide
99