Canon EOS 80D - Manual (Page 233)

233
Using an EX-series Speedlite (sold separately) makes flash
photography easy.
For detailed instructions, refer to the EX-series Speedlite’s
instruction manual. This camera is a Type-A camera that can use all
the features of EX-series Speedlites.
To set the flash functions and flash Custom Functions with the camera’s
menu, see pages 235-243.
 Flash exposure compensation
Set it with Quick Control (p.56) or [External flash func. setting]
under [z1: Flash control] (p.240). With Quick Control, you can set
flash exposure compensation in the same way as for the built-in
flash. See page 230.
 FE lock
Set this in the same way as for the built-in flash. See steps 2 to 4 on
page 232.
D
Using an External Speedlite
EOS-dedicated, EX-series Speedlites
Macro Lites Shoe-mount Speedlites
If it is difficult to achieve focus with autofocus, the EOS-dedicated, external
Speedlite will automatically emit the AF-assist beam as necessary.