Canon 0585C006 Instruction Manual page 95

The bottom of the picture looks dark.
Move at least 0.7 m/2.3 ft. away from the subject.
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Remove the lens hood if attached.
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The picture periphery looks dark.
Set the flash coverage to <L> (automatic) (p.32).
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When using the manual setting for the flash coverage, set a flash
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coverage wider than the shooting angle of view (p.32).
Check that C.Fn-21-1 is not set (p.85).
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The picture is very blurred.
When the shooting mode is set to the aperture-priority AE <f> mode
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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
program AE <d> or fully automatic mode (p.21). Note that you can also
set the sync speed in [Flash sync. speed in Av mode] (p.42).
The flash coverage is not set automatically.
Set the flash coverage to <L> (automatic) (p.32).
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Insert the mounting foot into the camera's hot shoe all the way, slide the
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lock lever to the right, and secure the Speedlite to the camera (p.17).
The flash coverage cannot be set manually.
Remove the bounce adapter (p.30).
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Retract the wide panel (p.33).
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The AF-assist beam does not fire.
When the color filter is attached, the AF-assist beam, which uses a
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series of small flashes, is not emitted. Set P.Fn-05-1 (p.87).
Functions cannot be set (k displayed).
Set the camera's shooting mode to <d>, <s>, <f>, <a>, or
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<F> (Creative Zone mode).
Set the power switch to the <K> position.
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Troubleshooting Guide
95