Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 256)

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Camera vibrations caused by the mirror’s reflex action when the picture
is taken is called “mirror shock”. Mirror lockup keeps the mirror up
before and during exposure to reduce blur caused by camera
vibrations. Useful when shooting close-ups (macro photography), using
a super telephoto lens, and shooting at slow shutter speeds.
1
Select [Mirror lockup].
Under the [ z 3 ] tab, select [ Mirror
lockup ], then press < 0 >.
2
Select the desired setting.
Select [ Enable ] or [ Enable: Mirror
down w/ s ], then press < 0 >.
3
Press the shutter button
completely.
Focus on the subject, then press the
shutter button completely.
X The mirror will swing up, and the
<
2 > icon will blink on the top LCD
panel.
4
Press the shutter button
completely again.
X The picture will be taken.
With [ Enable ] set, the mirror will go
back down after the picture is taken.
With [ Enable: Mirror down w/ s ]
set, the mirror will stay locked up
even after shooting. To cancel the
mirror lockup, press <
0 >.
2
Mirror Lockup