Canon EF 400mm f/2.8L IS USM Instructions Manual page 19

Extenders (Sold Separately)
●
When shooting with EOS A2/A2E/5 fitted with
either the EF300mm f/2.8L IS USM or
EF400mm f/2.8L IS USM, use –0.5 step
exposure compensation when using extender
EF1.4× II, and use –1 step exposure when using
extender EF2× II.
●
When taking pictures on an EOS A2/A2E/5
using an EF1.4× II/EF2× II extender with the
EF500mm f/4L IS USM or the EF600mm f/4L IS
USM, use the values in the table below for
exposure compensation.
Evaluative metering
Center-weighted average metering
Spot metering
●
Extenders cannot be used more than one at a
time.
●
AF is possible with extender EF1.4× II.
●
When an extender is attached, the AF speed will
become slower to retain proper control.
EF1.4 × II EF2 × II
–0.5 step –1 step
–0.5 step –1 step
— –0.5 step
15. 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.
Focusing Distance Range (mm)
Close distance Long distance Close distance Long distance
EF300mm f/2.8L IS USM
EF12 II 2016
EF25 II 1687
EF400mm f/2.8L IS USM
EF12 II 2602 13633
EF25 II 2314
EF500mm f/4L IS USM
EF12 II 3856 21193
EF25 II 3391 10778
EF600mm f/4L IS USM
EF12 II 4777 29195
EF25 II 4182 13944
MF mode is recommended for accurate focusing.
Magnification (×)
7561 0.18
3731 0.24
0.19
6974 0.23
0.15
0.18
0.14
0.17
ENG-18
0.04
0.09
0.03
0.06
0.03
0.05
0.02
0.05