Canon Speedlite 550EX Instructions Manual page 59

Ell'
Wireless Flash Range
3
Check thai the master unit's pilot
lamp is lit and that the slave unit(s)
are recharged and ready.
When a slave unit is ready, its AF·assist
beam blinks once per secorxl.
91Q)
6::g'~
4
Press the master unit's pilot lamp
(test firing button) to fire a test flash.
~T L~H .f;tJ>J
) a
q
When the wi reless lransm ission works, the
sla~e
units lire at tl64 output in the lottowing
sla~e
10 order: A, S, and C.
-l _
If a
sla~e
unit does not lire. place it closer to
the master unit or ang le the sensor more
toward the master unit arxl try again.
\
"Z.~(ill)
In a wireless flash system, the lIash mode
(E·m
autoflash. high·speed sync, manual
flash, stroboscopic flash). Itash exposure compensation, flash exposure
bracke~ng.
arxl other settings are all set with the master unit.
The
master unrt transmits all these
settill9S to the slave unns by wireless Signals. Controlling stave unrt(s) Is the same as
controlli ng one on<amera Speedli te.
With the EOS·3, a modeling flash can be fired to check the lighting effects (lighting
balance, shadows, etc.) before you take the picture. See page SO.
Make sure the slave units are
w~hin
the effective range
01
the master unit.
After the picture is taken, the slave unit's operation
resu~
is displayed on the LCD
panel.
W~h
the slave unlfs ma in switch set to SE (Save Enllrgy). the slave unit turns off
automatically if it is left unused for over 60 minutes'. Whi le the slave unit is off dUll to
this SE modi!, SE is displayed on the LCD panel. Within t hour" after thll slave unit
tums off in the SE mode, the slave unit can be turnad on again by pressing the master
uni\"s test firing button .
If the manual flash modi! has been set arxl you press the master unit's pilot lamp. al l
the slave units wil l ti re a test flash simultaneously at the manual ly·set flash output.
Alter pressing the shutter button halfway, test tiring cannot
be
executed during the first
6
sec.
Custom Function CF·4 can change th is to 10 minutes. See page 113.
Custom Function CF'5 can change th is to 8 hours. See page 113.
59