Canon EOS RP Advanced User Guide - Page 220

Flash Photography EL/EX Series Speedlites for EOS Cameras Using an EL/EX series Speedlite (sold separately) makes flash photography easy. For operation procedures, refer to the EL/EX series Speedlite's Instruction Manual. This camera is a Type-A camera that can use all the features of EL/EX series Speedlites. To set the flash functions and flash Custom Functions on the camera's menu screen, see =222. zzFlash exposure compensation You can adjust flash output (flash exposure compensation). With an image displayed on the screen, press the button, turn the dial to select the flash exposure compensation item, then turn the dial to set the flash exposure compensation. You can set flash exposure compensation up to ±3 stops in 1/3-stop increments. zzFE lock This enables you to attain an appropriate flash exposure for a specific part of the subject. Aim the viewfinder center over the subject, press the camera's button, then compose the shot and take the picture. ooEven if you set negative flash exposure compensation (to keep images darker), bright images may still be captured unless [z: Auto Lighting Optimizer] (=136) is set to [Disable]. ooYou can adjust the flash exposure compensation with Quick Control (=65) or with [Flash function settings] under [z: External Speedlite control] (=225). ooThe camera can turn on certain Speedlites automatically when the camera is turned on. For details, refer to the instruction manual of Speedlites that support this feature. 220