Canon EOS 20D - Manual (Page 23)

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1 Remove the caps.
¡ Remove the rear lens cap and the
body cap by turning them as shown
by the arrow.
2 Attach the lens.
¡ Align the EF-S lens with the camera’s
white EF-S lens mount index and turn
the lens as shown by the arrow until it
clicks in place.
¡ When attaching a lens other than an
EF-S lens, align the lens with the red
EF lens index mark.
3 On the lens, set the focus mode
switch to .
¡ If it is set to <MF>, autofocus will not
be possible.
4 Remove the front lens cap.
While pressing the lens release
button, turn the lens as shown by
the arrow.
¡ Turn the lens until it stops, then
detach it.
Mounting and Detaching a Lens
Mounting a Lens
EF-S Lens mount index
EF lens mount index
Detaching the Lens
When attaching or detaching the lens, take care to prevent dust from
entering the camera through the lens mount.