Mirror Lockup - Canon EOS-3 Instructions Manual

13. Mirror Lockup

Mirror lockup is enabled with Custom Function CF-12 (see page 116).
This prevents mirror-caused vibrations which may blur the image during
close-ups or when a super telephoto lens is used. To set this Custom
Function, see "Setting and Canceling Custom Functions" on page 104.
When mirror lockup is set, the camera operates as follows:
• When using mirror lockup, Remote Switch RS-80N3 (sold separately) is recommended.
• In very bright light such as at the beach or ski ground on a sunny day, take the
picture promptly after mirror lockup.
• During mirror lockup, do not point the camera lens at the sun. The sun's heat can
scorch and damage the shutter curtains.
• If you use mirror lockup with the self-timer for a bulb exposure, there will be a
shutter release sound when you release the shutter button during self-timer
operation. This is not the sound of the shutter release.
• During mirror lockup, the film advance mode will be single-frame shooting
regardless of the current film advance mode.
• If mirror lockup is used with the self-timer, pressing the shutter button completely
the first time will lock up the mirror and release the shutter 10 seconds or 2
seconds later (depending on the delay time selected).
1 Press the shutter button complete-
ly. The mirror locks up.
• After 30 seconds, the mirror goes back
down automatically. Pressing the shutter
button completely again locks up the
mirror again.
Release the shutter button and
2
press the shutter button completely
again to take the picture. The
mirror then goes back down after
the picture is taken.
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