Canon EF 70-200mm f4L USM - Manual (Page 6)

ENG-5
4. Zooming
To zoom, turn the zoom ring.
Be sure to finish zooming before focusing.
Changing the zoom ring after focusing can affect
the focus.
1.2m 3m
You can set the focusing distance range to
1.2 m/3.9 ft. to infinity or 3 m/9.8 ft. to infinity. By
setting the suitable focusing distance range, the
actual autofocusing time can be shorter.
1.2m 3m
3. Switching the Focusing
Distance Range
If the current focusing distance is not within the
focusing distance range you switch to, the lens
focusing may first stop at the start or end of the
focusing range. This is normal and not a
malfunction. Just press the shutter button halfway
again to resume normal autofocusing.
COP
Y