Canon 650D - Manual (Page 226)

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Regarding your Speedlite (slave unit), refer to its instruction manual and
set it as follows. The settings other than the ones below for the slave
unit’s control are all set with the camera. Different types of Canon
Speedlite slave units can be used and controlled together.
(1) Set the Speedlite as a slave unit.
(2) Set the Speedlite’s transmission channel to the same channel
as set on the camera.* 1
(3) If you want to set the flash ratio (p.232), set the slave unit ID.
(4) Position the camera and slave unit(s) within the range shown below.
(5) Face the slave unit’s wireless sensor toward the camera.*
2
*1: If the Speedlite does not have a transmission channel setting function, the camera
can work with any channel.
*2: In small rooms, the slave unit may work even if its wireless sensor does not face the
camera. The camera’s wireless signals can bounce off the walls and be received by
the slave unit. When using an EX-series Speedlite with fixed flash head and wireless
sensor, take pictures to make sure it can fire.
Using Wireless FlashN
Slave Unit Settings and Position
Approx.
10 m
(32.8 ft.)
Approx.
7 m
(23.0 ft.)
Approx. 5 m
(16.4 ft.)
Approx. 7 m
(23.0 ft.)
Approx.
80°
Example of Wireless Flash Set-up
Indoors
Outdoors
The camera’s master unit function cannot be used for wireless flash
shooting with radio transmission.
COP
Y