Canon EF Lens 用户手册
ENG-20
17. Extension Tubes
(Sold Separately)
You can attach extension tube EF12 II or EF25
II for magnified shots. The shooting distance and
magnification are shown below.
II for magnified shots. The shooting distance and
magnification are shown below.
EF300mm f/2.8L IS II USM
EF400mm f/2.8L IS II USM
MF mode is recommended for accurate focusing.
Focusing Distance Range (mm)
Magnification (×)
Close distance Long distance Close distance Long distance
EF12 II
1700
7529
0.22
0.04
EF25 II
1480
3727
0.28
0.09
Focusing Distance Range (mm)
Magnification (×)
Close distance Long distance Close distance Long distance
EF12 II
2375
13353
0.21
0.03
EF25 II
2113
6494
0.26
0.07