Canon Speedlite 430EX II - Manual (Page 27)

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With multiple Canon Speedlites having the wireless flash feature, you can
create various lighting effects with the same ease as using normal E-TTL II
autoflash.
The settings you input with the master unit attached to the camera are
also automatically transmitted to the slave units which are controlled by
the master unit via wireless. Therefore, you need not operate the slave
unit(s) at all during the shoot.
For details on wireless flash photography and operating the master unit,
see the master unit’s instruction manual. The procedure below applies to a
master unit attached to the camera and slave unit(s) controlled by wireless.
1 Set the master unit.
Attach the master unit Speedlite to
the camera and set it as necessary.
2 Set the 430EX II as the slave unit.
Hold down the
button for 2 sec. or more.
3 Check the communication
channel.
If the master unit and slave unit(s) are
set to a different channel, set them all
to the same channel (p.29).
4 Set the slave ID.
Set the slave ID when using two (A
and B) or three (A, B, and C) slave
groups (p.30).
5 Position the camera and
Speedlites.
Position the slave unit(s) within the
master unit’s wireless transmission
range.
Wireless Flash
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