Flash - Canon Speedlite 550EX Instructions Manual

For Type-A Cameras
Wireless Flash Photography
This section covers wireless flash photography with the 550EX. II explains the
550EX's buill-in master and slave flash features.
550EX Wireless Flash Features
A wireless flash system with multiple Speedlile 550EXs can be used as
easily as a single. on-camera Speedlite 550EX.
Up
to
three 550EXs or three groups 01 550EXs can be sel as slave units
for automatic control.
550EXs set as slave units
can be
positioned 1 0 obtain the desired lighting
effects. All of their senings are controlled by the master unit and camera.
[1] Wireless System Setup and Testing (page 52)
[2] Wireless E-TIL AUlofiash (page 60)
[3] Wireless Manual Flash (page 71 )
[4] Wireless Stroboscopic Flash (page 73)
(5J Manual or Stroboscopic Flash With a Slave Unit (page 74)
ThiS section assumes
thai
the Speedtite 550EX is
used
wnh the EOS-3.
Belore proceeding. rirstturn on the maIO switch on the EOS..J and 550EX.
In these Instructions. a Speedlite 550EX whose wireless selec10r has been sellO
MASTER Is called the "master unit" and a 550EX
whose
wireless seledor h as been
selto SLAVE
ts
called a · slave unit."
For EOS ·3 operalions . refer to the EOS·3Instructions.
Wilh the EOS Elan 1I-IIEJSO-50E . EOS Rebel Gl500N . EOS IX. and EOS IX LitellX7 ,
only one slave group can be used lor wire less E·TIL aUlo!lash control.
Quick flash cannot
be
used with wireless I