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

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Attaching and Detaching a Lens
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While pressing the lens release 
button, turn the lens as shown by 
the arrow.
 
Turn the lens until it stops, then 
detach it.
 
Attach the rear lens cap to the 
detached lens.
Detaching the Lens
 
Do not look at the sun directly through any lens. Doing so may cause 
loss of vision.
 
When attaching or detaching a lens, set the camera’s power switch to 
<2>.
 
If the front part (focusing ring) of the lens rotates during autofocusing, do 
not touch the rotating part.
Minimizing Dust
 
When changing lenses, do it quickly in a place with minimal dust.
 
When storing the camera without a lens attached, be sure to attach the 
body cap to the camera.
 
Remove dust on the body cap before attaching it.