Canon EOS 60D - Manual (Page 125)

125
Although using the self-timer or Remote Switch can prevent camera
shake, using mirror lockup to prevent camera vibrations (mirror shock)
can also help when you use a super telephoto lens or shoot close ups
(macro photography).
When [8C.Fn III -5: Mirror lockup] is set to [1: Enable], shooting
with mirror lockup will be possible (p.257).
1
Focus the subject, then press the shutter button
completely.
X The mirror will swing up.
2
Press the shutter button completely again.
X The picture is taken and the mirror goes back down.
Mirror LockupN
In very bright light such as at the beach or a ski slope on a sunny day,
take the picture promptly after mirror lockup.
Do not point the camera toward the sun. The sun’s heat can scorch and
damage the shutter curtains.
If you use the self-timer and mirror lockup in combination with a bulb
exposure, 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, but no
picture will be taken.
When [1: Enable] is set, single shooting will take effect even if the drive
mode is set to continuous.
When the self-timer is set to <Q> or <k>, the picture will be taken
after 10 sec. or 2 sec. respectively.
If 30 seconds elapse after the mirror has locked up, it will go back down
automatically. Pressing the shutter button completely again locks up the
mirror again.
For mirror lockup, using Remote Switch RS-60E3 (sold separately) is
recommended (p.124).
You can also lockup the mirror and shoot with a remote controller (sold
separately, p.126). Setting the remote controller to a 2-sec. delay is
recommended.