Canon 550EX - Manual (Page 117)

Troubleshooting Guide
No Problem Probable Cause Solution Page
9 The subject was toward the
edge of the picture and it
cam e out overexposed.
The subject was not correctly
exposed with the flash,
W ith an EO S cam era having
m ultiple focusing points,
select a focusing point which
covers the subject and then
com pose the shot before
taking the picture W ith an
EO S cam era having only
one focusing point, set a
suitable exposure
com pensation am ount on the
m inus side.
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86
10 The subject was in front of a
window and the subject’s
face turned out dark.
The flash’s reflection in the
window caused the
underexposure.
Position yourself or the
subject so that the flash's
reflection in the window does
not enter the picture. O r set
exposure com pensation on
the plus side
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86
11 A group picture of people
wearing black clothing had
overexposed faces
The Speedlite tried to obtain
a correct exposure for the
black clothing which has low
reflectance.
Set exposure com pensation
on the m inus side 36
86
12 The periphery of the picture
cam e out dark.
The flash head’s zoom
setting that you set m anually
gave inadequate flash
coverage for the lens focal
length
Set the flash head to auto
zoom . O r m anually set a
zoom setting that is shorter
than the lens focal length
18
13 The picture looks
overexposed or
underexposed
Flash exposure
com pensation was still in
effect.
Cancel the flash exposure
com pensation setting
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86
14 The picture cam e out
blurred,
Since the cam era was set to
the Av m ode and the scene
was dark, a slow shutter
speed was set automatically
During the slow exposure,
cam era shake caused the
blurry photograph
(1) Using a tripod is
recom m ended
(2) Use the P m ode
(3} Use the M m ode on the
cam era
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82
15 The slave unit does not fire The slave unit’s wireless
selector is not set to SLAV E
Set the slave unit’s wireless
selector to SLAVE ,
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100
The slave unit is not within
the m aster unit's wireless
transm ission range
Position the slave unit within
the wireless transm ission
range
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