Canon EOS 3 User Manual (en)

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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.
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
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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• 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).
 06. C836-E (61~)  28-01-2003  11:49  Pagina 89