Canon EOS RP Instruction Manual page 395

AF-Assist Beam
The AF-assist beam may fire repeatedly when you press the shutter button
halfway under low light or in similar conditions, to make autofocusing easier.
The AF-assist beam does not fire when [ z : AF operation] is set to [Servo
o
AF].
The AF-assist beam does not fire when Touch AF is used (when [ z : Touch
o
Shutter] is set to [Disable]).
When you are using an external flash unit, either the camera or the flash unit
o
fires an AF-assist beam as needed. However, only the camera's AF-assist
beam fires when you are using a Speedlite 90EX, Macro Ring Lite, or Macro
Twin Lite.
A small series of flashes is fired even if you set the external flash's AF-assist
o
beam emission method in the Personal Functions to infrared AF-assist beam
firing. To disable AF-assist beam firing, set [ z : AF-assist beam firing] to
[Disable] ( = 201).
Focus range with the AF-assist beam is generally no more than 3.5 m/11.5 ft.
o
Selecting the AF Operation
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