Canon EOS 7D Mark II Guía De Instrucciones página 45

Zooming
Detaching the Lens
To owners of the EF-S18-135mm f/3.5-5.6 IS USM lens:
You can prevent the lens from extending out while you are carrying it
around. Set the zoom ring to the 18mm wide-angle end, then slide
the zoom ring lock lever to <LOCK>. The zoom ring can be locked
only at the wide-angle end.
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.
Attaching and Detaching a Lens
Turn the zoom ring on the lens
with your fingers.
If you want to zoom, do it before
focusing. Turning the zoom ring after
achieving focus may throw off the
focus.
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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