3. Setting the Communication Channel
If there are other wireless flash systems nearby, you can change the
channel IDs to prevent signal interference. The channel IDs of the
master unit and the slave unit(s) must be set to the same.
Press <MENU> Button to
1
enter C.Fn CH setting.
In C.Fn CH, turn the Select
2
Dial to choose channel ID
from 1 to 32.
Press the Set Button to
3
confirm.
4. Wireless ID Settings
Change the wireless channels and wireless ID to avoid interference
for it can only be triggered after the wireless IDs and channels of the
master unit and the slave unit are set to the same.Press the <MENU>
button to enter C.Fn ID. Press the Set Button to choose OFF channel
expansion shutdown, and choose any figure from 01 to 99.
C.Fn
Ver 0.5
CLEAR
CH
ID
BEEP
STBY
07
SCAN
5. Scan
the
Spare
Channel
To avoid the interference of using the same channel by others, this
function can be used: enter the C.Fn settings and find the SCAN
option. When setting it to START, it will scan from 1% to 100%. And
the 8 spare channels will be displayed after the scan is completed.
C.Fn
Ver 0.5
CLEAR
CH
ID
BEEP
STBY
SCAN
22 08 32 23
30 21 07 06
6. ETTL
Fully Automatic Wireless Flash Shooting
Using Automatic Wireless Flash with a Single Slave Unit
Master Unit Setting
1
●
Attach a
GIO1 C
camera flash on the
camera and set it as the
master unit.
●
ST-III
-C can also be
used as master unit.
ST-
III
-C can control
GIO1 C
's
ZOOM value when the
ZOOM is adjusted to auto
(A) mode.
Slave Unit Setting
2
●
Set the other camera flash
as the wireless slave Unit.
Check the communication
3
channel.
5
Check that the flash is
6
ready.
●
Check that the master flash
ready indicator is lightened.
● When the slave flash ready
indicator is ready, the AF-
assist beam lighting area
will blinks at 1 second
intervals.
Check the flash operation.
7
●
Press the master unit’s
Test Button
<
>
.
● Then, the slave unit will
fire. If not, adjust the slave
unit’s angle toward the
master unit and distance
from the master unit.
4
●
If the master unit and slave
unit(s) are set to a different
channel, set them to the
same channel. (Page
1
9)
Position the camera and
flashes.
●
Position the camera and
flashes as the picture shows.
(Page
1
7)
Set the master unit’s flash
mode to <ETTL>.
●
Set the master unit’s flash
mode to <
ETTL
>.
●
For shooting, <
ETTL
> will
automatically be set for the
slave unit.
●
Set the master unit flash
firing as
ON
to fire a flash.
-
1
9 -
-
2
0 -
