Canon ICAM62B Advanced User's Manual page 298

Flash Function Settings
Wireless functions
z
Firing ratio control
z
Flash zoom (Flash coverage)
z
298
You can use radio or optical wireless
transmission to shoot with wireless multiple-
flash lighting.
For details on wireless flash, refer to
the Instruction Manual of a Speedlite
compatible with wireless flash photography.
With a macro flash, you can set the firing
ratio control.
For details on firing ratio control, refer to
the macro flash's Instruction Manual.
With Speedlites having a zooming flash
head, you can set the flash coverage.