Canon EF11-24mm f/4L USM User Manual page 11

8. Extension Tubes
(Sold separately)
You can attach extension tube EF12 II for
magnified shots. The shooting distance and
magnification are shown below.
Focusing Distance
Range (mm)
Close
distance
11mm
EF12 II
188
24mm
MF mode is recommended for accurate focusing.
Magnification (×)
Long Close Long
distance distance distance
Incompatible
203 0.73 0.53
ENG-10