Canon Speedlite Transmitter ST-E2 - Manual (Page 11)

Wireless Multi-Flash E-TTL Autoflash Operation
T h e r e a r e t w o t y p e s of wireless
multi-flash
ations:
RATIO O F F : All slaves fire
the same flash output.
RATIO ON: Slaves are given
a n ID, e i t h e r A o r B. T h e f l a s h
ratio is then set for each
The flash ratio can be only when
the camera is an EOS-3.
The flash ratio cannot be set with an
EOS EOS EOS Rebel
EOS IX or EOS Lite.
By c h a n g i n g t h e d i s t a n c e
between t h e subject a n d
slaves, the lighting balance
(flash ratio) can be changed
accordingly.
Two or more slaves can be
used.
With the EOS-3, a modeling
flash can be fired to check
t h e lighting effects before
the picture is taken.
As a n e x a m p l e , t w o s l a v e s a r e
used here, one positioned on t h e
left a n d t h e other on t h e right of
the subject.
All t h e s l a v e s s e t a t t h e s a m e
c h a n n e l fire a t t h e s a m e o u t p u t
controlled by
E-TTL autoflash t o
obtain a correct exposure.
operation is
a s with wireless autoflash.
With the EOS-3, make sure the
f l a s h r a t i o control
lamp is off. (If necessary, press
the
button to t u r n i t
off.) t h e flash ratio control
lamp is on, the Speedlite may
not fire or a correct exposure
m a y n o t be a t t a i n e d . A f t e r
turning off the flash ratio con-
trol lamp, set the main switch
to to prevent the flash
ratio control lamp from light-
ing inadvertantly.
Sample Multi-Flash
Setup with Uniform
Flash Output
In t h e sample flash s e t u p shown
below, t h e lighting on t h e left
be b r i g h t e r t h a n on t h e r i g h t of
t h e subject.
Outdoors
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