Canon EOS 5D Mark IV L-series Zoom Lens Kit Manuel Du Propriétaire

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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, shooting at slow shutter speeds, etc.
1
Select [Mirror lockup].
 
Under the [z4] tab, select [Mirror 
lockup
], then press <0>.
2
Select [Enable].
3
Focus on the subject, then press 
the shutter button completely.
X
The mirror will swing up.
4
Press the shutter button 
completely again.
 
The picture is taken and the mirror 
goes back down.
2
 Mirror LockupN