Canon DS126571 用户手册

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页码 414
Custom Wireless Flash ShootingK
190
When [Flash mode] is set to [Manual flash], flash exposure can be set 
manually. The flash output settings that can be set ([1 flash output], 
[Group A output], etc.) vary depending on the [Wireless func.] setting 
(see below).
[Wireless func.0]
[Firing group: 1All]:
The manual flash output setting is 
applied to all the external Speedlites.
[Firing group: 1 (A:B)]:
You can set the flash output 
separately for slave groups A and B.
[Wireless func.0+3]
[Firing group: 1All and 2]:
The flash output can be set 
separately for the external 
Speedlite(s) and built-in flash.
[Firing group: 1 (A:B)2]:
You can set the flash output 
separately for slave groups A and B. 
You can also set the flash output for 
the built-in flash.
Setting the Flash Output Manually for Wireless Flash Shooting