Canon EOS-1DS Mark III Instruction Manual page 106

Flash Photography
Flash Function Settings and Flash Custom Functions
When an EXosedes S_such as the 580EX _controllable by the
camera is attached, you can use the camera's menu screen to set the
Speedlite's flash function settings such as the flash mode, FEB, and 1st
or 2rid curtain sync, and wireless flash. Flash Custom Functions can
also be enabled or disabled.
Turn on the Speedlite before setting its functions.
For details on which Speedlite settings the camera can set, see the EX-
sedes Speedlite's instruction manual.
1
Select [External Speed[ire
control}.
®_ Under the [t?;] tab, select [E×tema[
Speed[ite control], then press <J_>.
Flash function settings
Flash C,Fn settings
106
Select either IF[ash function
settings] or IF[ash C.Fn settings].
_ Turn the <O> dial to select the menu
item, then press <_>.
Set the flash function settings.
®_ Select a flash function and set it as
desired. The procedure is the same
as setting a menu function.
_ On the flash function settings screen,
the settable items, current settings,
flash mode setting, and flash Custom
Function settings might look different
on your camera.
®_ To reset the flash settings to the
default, press the <[NFO.> button
while the flash function setting screen
is displayed.