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This method has all the Speedlites fire at the same flash output with E-
TTL II autoflash controlling the total flash output.
1Set the camera-attached 580EX II
as the master unit.
2Set the other 580EX II
Speedlites(s) as the wireless
slave unit(s).
3Check 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.40).
4Position the camera and
Speedlites.
Position the Speedlites within the
range shown on the next page.
5Set the master unit’s flash mode
to <a>.
For shooting, <a> will also be
set automatically for the slave unit(s).
6Check that the flash is ready.
When the slave unit(s) is ready to fire,
the AF-assist beam will blink at 1-sec.
intervals.
Fully Automatic Wireless Flash
A65_03.fm Page 37 Thursday, November 23, 2006 1:27 PM