Canon Speedlite 58OEX Instruction Manual page 36

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The Speedlite's zoom setting will be set automatically to 24mm. It is possible to change
the master unit's zoom setting. However, note that the master unit transmits wireless
signals to the slave unit(s) with the preflash. Therefore, the flash coverage must cover the
slave unit's position. If you change the master unit's zoom setting, be sure to test the
wireless operation before shooting.
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If the slave unit enters auto power off, it can be turned on again by pressing the master
unit's test firing button.
;@>
A test flash cannot be fired while the camera's operation timer
04
or
06
is active.
Master Unit's Flash ON/OFF
You can disable the master unit from firing during actual exposure so that only
the slave unit(s) will fire in the final picture.
ETTL
1m
Zoom
,2Ymm
" '"
,1/
-on-
-::8
~
I"
/"1~'11
i
Press the
<ZOOM/~>
button so
I
that the display blinks as shown on
the left.
Disable the master unit's flash
firing.
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Turn the <@> dial to select <0
FF>,
then press the <@> button.
t»>
The
< .....
2>
icon will blink.
ETTL
1m
Zoom
2Ymm
,I~-­
-"z.-~
1
- - " T ' - - - - - - -
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Even if you disable the master unit's flash firing, it will still fire a preflash to transmit
wireless signals.
36