Canon EOS 77D Telephoto Lens Kit Owner's Manual

Page of 903
231
Wireless Flash PhotographyN
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.
Wireless Flash Photography Configurations
External Speedlite
Built-in 
Flash
Page
Setting
Quantity
A:B Flash 
Ratio
Wireless 
Functions
Firing Group
Fully 
Automatic 
(E-TTL II 
autoflash)
Single
-
-
p.232
0
1
All
Single
-
Used
p.235
0
:3
-
Multiple
-
-
p.234
0
1
All
Multiple
Set
-
p.237
0
1
(A:B)
Multiple
-
Used
p.238
0
+3
1
All and 2
Multiple
Set
Used
0
+3
1
(A:B)2
• Flash exposure 
compensation
p.239
• FE  lock
External Speedlite
Built-in 
Flash
Page
Setting
Quantity
A:B Flash 
Ratio
Wireless 
Functions
Firing Group
Manual 
Flash
Single/
Multiple
-
-
p.240
0
1
All
Multiple
Set
-
0
1
(A:B)
Single/
Multiple
-
Used
0
+3
1
All and 2
Multiple
Set
Used
0
+3
1
(A:B)2
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.