Canon EOS RP Mirrorless Camera - Manual (Page 227)

227
Setting the Flash Function
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Wireless functions / Firing ratio control
Wireless (multiple) flash photography is
possible with radio or optical transmission.
For details on wireless flash, refer to
the Instruction Manual of a Speedlite
compatible with wireless flash photography.
With a macro flash (MR-14EX II, etc.)
compatible with flash function settings, you
can set the firing ratio between flash tubes
or flash heads A and B, or use wireless
flash with additional receiver units.
For details on firing ratio control, refer to
the macro flash’s Instruction Manual.
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Flash zoom (Flash coverage)
With Speedlites having a zooming flash
head, you can set the flash coverage.
Normally, set this to [AUTO] so that the
camera will automatically set the flash
coverage to match the lens focal length.