Using The Built-In Flash - Canon EOS Rebel XT Instruction Manual

Using the Built-in Flash
E-TTL II autoflash obtains high-precision and consistent flash shots.
Using the Built-in Flash in the Basic Zone
If necessary,
the built-in flash will pop-up automatically
in low-light
or backlit conditions. (except in the
<~> <~>
<OJ> modes)
Using the Built-in Flash in the Creative Zone
Regardless of the light level,
you can press the
<~>
button to pop-up
and fire the built-in flash whenever desired.
P :
For fully automatic flash photography.
The shutter speed
(11
60 sec. -
11200
sec.) and aperture value are set automatically,
just as in <0> (Full Auto) mode.
Tv :
Enables you to set the desired shutter speed (30 sec. -1/
200 sec.).
The camera then
automatically sets the flash
aperture value
to obtain the proper exposure at the shutter
speed you have set.
Av :
Enables you to set the desired aperture value.
The camera
then
automatically sets the shutter speed (30 sec. -
1/200
sec.)
to obtain the proper exposure at the aperture you have
set.
Against dark backgrounds such as the night scenes, slow-sync
shooting will be set so that both the subject and background are
exposed correctly. The main subject is exposed with the flash,
and the background is exposured with a slow shutter speed.
\ijj)
Because automatic slow-sync shooting uses a slow shutter
speed, always use a tripod.
If you do not want a slow shutter speed to be set, set C.Fn-3
[Flash sync. speed in Av mode}
to
[1: 1/200sec. (fixed)].
(p.148)
M :
You can set both the shutter speed (bUlb or 30 sec. -1/200
sec.) and aperture value.
The main subject is exposed
properly by the flash. The background exposure will vary
depending on the shutter speed and aperture.
A·DEP :
The flash result will be the same as the
<
P
>
mode.
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