Canon EF 400mm f/4 DO IS II USM EF400mm f/4 DO IS II USM Instructions - Page 22
Extension Tubes, Sold Separately
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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. EF12 II EF25 II Focusing Distance Range (mm) Magnification (×) Close distance Long distance Close distance Long distance 2753 13407 0.17 0.03 2362 6638 0.22 0.07 MF mode is recommended for accurate focusing. ENG-21
ENG-21
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.
MF mode is recommended for accurate focusing.
Focusing Distance Range (mm)
Magnification (×)
Close distance
Long distance
Close distance
Long distance
EF12 II
2753
13407
0.17
0.03
EF25 II
2362
6638
0.22
0.07