Zoom  - Canon EOS 5D Mark III Instruction Manual

Attaching and Detaching a Lens
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.

About Zooming
Detaching the Lens
40
To zoom, 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 slightly.
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.