Canon EOS REBEL T7i Instruction Manual page 219

Wireless Flash Photography Configurations
The tables below show the possible configurations for wireless flash
photography. Select the configuration suiting the subject, shooting
conditions, the number of external Speedlites you use, etc.
External Speedlite
Quantity
Single
Single
Multiple
Fully
Multiple
Automatic
Multiple
(E-TTL II
autoflash)
Multiple
• Flash exposure
compensation
• FE lock
External Speedlite
Quantity
Single/
Multiple
Multiple
Manual
Flash
Single/
Multiple
Multiple
Even if you disable the built-in flash from firing, it will still fire in order
to control the slave unit via optical transmission. The flash fired to
control the slave unit may therefore appear in the picture depending on the
shooting conditions.
Built-in
A:B Flash
Flash
Ratio
- -
- Used
- -
Set -
- Used
Set Used
Built-in
A:B Flash
Flash
Ratio
- -
Set -
- Used
Set Used
Wireless Flash PhotographyN
Page
Wireless
Functions
p.220
0
p.223
0:3
p.222
0
p.225
0
0+3
p.226
0+3
p.227
Page
Wireless
Functions
0
0
p.228
0+3
0+3
Setting
Firing Group
1All
-
1All
1(A:B)
1All and 2
1(A:B)2
Setting
Firing Group
1All
1(A:B)
1All and 2
1(A:B)2
219