About Wireless Flash

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With multiple Canon Speedlites having the wireless flash feature, you
can createvarious lighting effects with the same ease as using normal
E-TTL
II
autoflash.
The settings you inputwith the 580EX
II
(masterunit) attached to the
camera are also automaticallytransmitted to the slave units which are
controlled bythe master unit via wireless. Therefore, you need not
operatethe slave unit(s) at all during the shoot.
The basicwireless set-up is illustrated below. All you need to do is set
the masterunit to <ETTL >enablewireless E- TTL
II
autoflash (p.37).
Notethat with Type-A cameras prior to the EOS-1 0Mark
II
and EOS
ELAN 7NE/ELAN 7N/30V/33V, E-TTLautoflash will be used instead.

Positioning and Operation Range

8m (26.2ft.) 12m(39.4ft.)
III
Anyflash exposure compensation, high-speed sync (FP flash),
FE
lock,
FEB, manualflash, and stroboscopic flash settings set with the master
unitwill all be automatically transmitted to the slave units.
Evenwith multiple slave units, all
of
themwill be controlled
in
thesame
wayvia wireless.
A580EX
II
setas aslave unit can also be controlled by wireless by
SpeedliteTransmitter ST-E2 (optional).
Hereinafter,the "master unit" will refer to a580EX
1\
attachedto the
camera, anda"slave unit" will be awireless 580EX
II.
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