Extender EF 1.4x II Compatibility Chart (2008)
Lens Attachment
Focal Length
(mm)
f-stop
(f)
Max. Magnification
(x)
AF
EF 135mm f/2L USM
 189 2.8 ~ 45 0.27 O
EF 180mm f/3.5L Macro USM
 252 4.5*1 ~ 45 1.40 O*3
EF 200mm f/1.8L USM
 280 2.5 ~ 32 0.12 O
EF 200mm f/2.8L II USM
 280 2.4 ~ 32 0.22 O
EF 300mm f/2.8L IS USM
 420 4 ~ 45 0.15 O
EF 300mm f/4L IS USM
 420 5.6 ~ 45 0.33 O
EF 400mm f/2.8L IS USM
 560 4 ~ 45 0.22 O
EF 400mm f/4L DO IS USM
 560 5.6 ~ 45 0.17 O
EF 400mm f/5.6L USM
 560 8 ~ 45 0.18 O
EF 500mm f/4L IS USM
 700 5.6 ~ 64 0.17 O
EF 600mm f/4L IS USM
 840 5.6 ~ 64 0.17 O
EF 1200mm f/5.6L USM
 1,680 8 ~ 45 0.12 X
EF 70-200mm f/2.8L USM
 98 ~ 280 4 ~ 45 0.22 O*2
EF 70-200mm f/2.8L IS USM
 98 ~ 280 4 ~ 45 0.24 O
EF 70-200mm f/4L USM
 98 ~ 280 5.6 ~ 45 0.31 O
EF 70-200mm f/4L IS USM
 98 ~ 280 5.6 ~ 45 0.31 O
EF 100-400mm f/4.5-5.6L IS USM
 140 ~ 560 6.7 ~ 54*1 0.28 O*4*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 AF is ONLY possible with the EOS-1v and EOS-3 cameras, ONLY when using the center focusing point.
*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.