128Troubleshooting GuideIf the main subject looks very dark or very bright, set flash exposurecompensation (p.28).If there is a highly reflective object in the picture, use FE lock (p.30).With high-speed sync, the faster the shutter speed, the lower theguide number becomes. Move closer to the subject (p.31).Move at least 0.5 m/1.6 ft. away from the subject.When shooting within 1 m/3.3 ft. of the subject, set the bounce angledown by 7° (p.34).Remove the lens hood if attached.Set the flash coverage to <L> (automatic) (p.38).When manually setting the flash coverage, set a flash coveragewider than the shooting angle of view (p.38).Make sure C.Fn-21-1 is not set (p.117).When the shooting mode is set to the <f> aperture-priority AEmode and the scene is dark, slow sync is enabled automatically (theshutter speed becomes slower). Use a tripod, or set the shootingmode to the <d> program AE or fully automatic mode (p.25). Notethat you can also set the sync speed in [Flash sync. speed in Avmode] (p.54).Pictures are underexposed or overexposed.The bottom of the picture looks dark.The picture periphery looks dark.The picture is very blurred.