Canon EOS Rebel SL1 18-55mm IS STM Lens Kit - Manual (Page 336)

Troubleshooting Guide
336
In shooting modes (<A> <C> <2> <4> <C> <6>) whose
default setting is <
a
> (Auto flash), the built-in flash will rise
automatically when necessary.
If you shoot continuously with the built-in flash at short intervals, the
flash may stop operating to protect the flash unit.
If you use a flash unit other than an EX-series Speedlite, the flash will
always be fired at full output (p.312).
Under [z2: Flash control] and [External flash C.Fn setting], if
[Flash metering mode] is set to [TTL], the flash will always fire at full
output (p.233).
If flash exposure compensation has already been set with the external
Speedlite, flash exposure compensation cannot be set with the
camera. When the external Speedlite’s flash exposure compensation
is canceled (set to 0), flash exposure compensation can be set with
the camera.
Under [z2: Flash control], set [Flash sync. speed in Av mode] to
[Auto] (p.232).
The built-in flash’s pop-up mechanism moves slightly. This is normal
and not a malfunction.
The built-in flash is raised by itself.
The built-in flash does not fire.
The flash always fires at full output.
I cannot set flash exposure compensation when
using an external Speedlite.
High-speed sync cannot be set in the <f> mode.
The camera makes a noise when it is shaken.
COP
Y