Preventing Camera Shake - Canon EOS REBEL XS EOS REBEL XS Instruction Manual

Preventing Camera ShakeN
The camera's mechanical shake caused by the reflex mirror action can
affect images taken with a super telephoto lens or close-up (macro)
lens. In such cases, mirror lockup is effective.
Mirror lockup is enabled by selecting [7 Custom Functions
(C.Fn)] and setting [Mirror lockup] (p.157) to [1: Enable].
Shooting Tips
Using the self-timer <l> with mirror lockup.
When you press the shutter button completely, the mirror locks up,
then the picture is taken 2 sec. later.
Do not point the camera toward the sun. The sun's heat can scorch and
damage the shutter curtains.
If you use bulb exposures, the self-timer, and mirror lockup in
combination, keep pressing the shutter button completely (self-timer
delay time + bulb exposure time). If you let go of the shutter button
during the self-timer countdown, there will be a shutter-release sound.
However, this is not the actual shutter release (no picture is taken).
Even if <i> (Continuous shooting) has been set, single shooting will
still take effect.
The mirror locks up, and after 30 seconds, it will go back down
automatically. Pressing the shutter button completely again locks up the
mirror again.
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Focus the subject and press the
shutter button completely. The reflex
mirror will lock up.
Then press the shutter button
completely again to take the picture.
The reflex mirror will then go back
down.