Canon 650D - Manual (Page 324)

Troubleshooting Guide
324
Set [z2: Auto Lighting Optimizer] to [Disable]. When [Standard/
Low/High] is set, even if you set a decreased exposure compensation
or flash exposure compensation, the image may come out bright
(p.123).
If you shoot at night when the background is dark, the shutter speed
becomes slow automatically (slow-sync shooting) so that both the
subject and background are properly exposed. To prevent a slow
shutter speed, under [z1: Flash control], set [Flash sync. speed in
Av mode] to [1/200-1/60 sec. auto] or [1/200 sec. (fixed)] (p.215).
In the A, 2, 4, and 6 modes, the built-in flash will be raised
automatically when flash is 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.306).
Under [z1: 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.216).
Even though I set a decreased exposure compensation,
the image comes out bright.
When I use the <f> mode with flash, the shutter speed
becomes slow.
The built-in flash is raised by itself.
The built-in flash does not fire.
The flash always fires at full output.
COP
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