Canon 550 EX - Manual (Page 117)

117
Troubleshooting Guide
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Solution
With an EOS camera having
multiple focusing points,
select a focusing point which
covers the subject and then
compose the shot before
taking the picture. With an
EOS camera having only
one focusing point, set a
suitable exposure
compensation amount on the
minus side.
Position yourself or the
subject so that the flash’s
reflection in the window does
not enter the picture. Or set
exposure compensation on
the plus side.
Set exposure compensation
on the minus side.
Set the flash head to auto
zoom. Or manually set a
zoom setting that is shorter
than the lens focal length.
Cancel the flash exposure
compensation setting.
(1) Using a tripod is
recommended.
(2) Use the P mode.
(3) Use the M mode on the
camera
Set the slave unit’s wireless
selector to
.
Position the slave unit within
the wireless transmission
range.
Probable Cause
The subject was not correctly
exposed with the flash.
The flash’s reflection in the
window caused the
underexposure.
The Speedlite tried to obtain
a correct exposure for the
black clothing which has low
reflectance.
The flash head’s zoom
setting that you set manually
gave inadequate flash
coverage for the lens focal
length.
Flash exposure
compensation was still in
effect.
Since the camera was set to
the Av mode and the scene
was dark, a slow shutter
speed was set automatically.
During the slow exposure,
camera shake caused the
blurry photograph.
The slave unit’s wireless
selector is not set to
.
The slave unit is not within
the master unit’s wireless
transmission range.
Problem
The subject was toward the
edge of the picture and it
came out overexposed.
The subject was in front of a
window and the subject’s
face turned out dark.
A group picture of people
wearing black clothing had
overexposed faces.
The periphery of the picture
came out dark.
The picture looks
overexposed or
underexposed.
The picture came out
blurred.
The slave unit does not fire.
No.
9
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08. F073-E (99~) 02.4.1 2:16 PM Page 117