Canon EF 100mm f2.8L Macro IS USM - Manual (Page 6)

ENG-5
To shoot in autofocus (AF) mode, set the focus
mode switch to AF.
To use only manual focusing (MF), set the focus
mode switch to MF, and focus by turning the
focusing ring. The focusing ring always works,
regardless of the focus mode.
2. Setting the Focus
Mode
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway
and turning the focusing ring. (Full-time manual
focus)
You can switch the focusing distance range to
one of three settings: FULL (0.3 m/1.0 ft. to
infinity), 0.3 m/1.0 ft. to 0.5 m/1.6 ft., or 0.5 m/1.6
ft. to infinity.
By setting the suitable focusing distance range,
the actual autofocusing time can be shorter.
3. Switching the Focusing
Distance Range
COP
Y