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Extender EF 2x Compatibility Chart
Lens Attachment
Focal Length
(mm)
f-stop
(f)
Max. Magnification
(x)
AF
EF 135mm f/2L USM
270
4 ~ 64
0.38
O
EF 180mm f/3.5L Macro USM
360
6.7*1 ~ 64
2.0
X
EF 200mm f/1.8L USM
400
3.5 ~ 45
0.18
O
EF 200mm f/2L IS USM
400
5.6 ~ 64
0.24
O*4
EF 200mm f/2.8L II USM
400
5.6 ~ 64
0.32
O
EF 300mm f/2.8L IS USM
600
5.6 ~ 64
0.28
O
EF 300mm f/4L IS USM
600
8 ~ 64
0.47
X*4*5
EF 400mm f/2.8L IS USM
800
5.6 ~ 64
0.31
O
EF 400mm f/4L DO IS USM
800
8 ~ 64
0.24
X*4*5
EF 400mm f/5.6L USM
800
11 ~ 64
0.18
X
EF 500mm f/4L IS USM
1,000
8 ~ 90
0.25
X*4*5
EF 600mm f/4L IS USM
1,200
8 ~ 90
0.24
X*4*5
EF 800mm f/5.6L IS USM
1,600
11 ~ 64
0.28
X
EF 1200mm f/5.6L USM
2,400
11 ~ 64
0.18
X
EF 70-200mm f/2.8L USM
140 ~ 400
5.6 ~ 64
0.33
O*2
EF 70-200mm f/2.8L IS USM
140 ~ 400
5.6 ~ 64
0.33
O*2
EF 70-200mm f/2.8L IS II USM
140 ~ 400
5.6 ~ 64
0.33
O*2
EF 70-200mm f/4L USM
140 ~ 400
8 ~ 64
0.45
X*4
EF 70-200mm f/4L IS USM
140 ~ 400
8 ~ 64
0.45
X*4
EF 100-400mm f/4.5-5.6L IS USM
200 ~ 800
9.5 ~ 64
0.41
X*5
(O =possible X =impossible)

*1
Data based on EOS models with exposures displayed in 1/2 stop increments. It varies slightly with the EOS-1v, EOS-1N, EOS-1 and EOS-3.
*2
If the EF 70-200mm f/2.8L USM lens is attached to an EOS camera having multiple focusing points and an Extender is attached to the lens, only the center focusing point will be usable for AF.
*3
The autofocusing range is from 0.8m/2.6ft. to infinity.
*4
With the EOS-1D series, EOS-1v and EOS-3, AF is possible, but with the center focusing point only.
*5
The Image Stabilizer does not operate with the following cameras: EOS 650, 620, 630/600, RT, 700, 750, 850, EOS-1, A2/A2E, 10s, Elan, Rebel/Rebel S, Rebel II/Rebel SII.

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