Canon EOS 6D Mark II Mode D'emploi page 49

Detaching the Lens
Do not look at the sun directly through any lens. Doing so may cause loss of
vision.
Tips for Avoiding Smudges and 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.
Attaching and Detaching a Lens
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.
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