Canon EOS REBEL T7i Instruction Manual page 138

Lenses and Usable AF Points
EF70-200mm f/4L USM
+ Extender EF1.4x I/II/III
EF70-200mm f/4L USM
+ Extender EF2x I/II/III
EF70-200mm f/4L IS USM
EF70-200mm f/4L IS USM
+ Extender EF1.4x I/II/III
EF70-200mm f/4L IS USM
+ Extender EF2x I/II/III
EF70-210mm f/3.5-4.5 USM
EF70-210mm f/4
EF70-300mm f/4-5.6 IS USM
EF70-300mm f/4-5.6 IS II USM
EF70-300mm f/4-5.6L IS USM
EF70-300mm f/4.5-5.6 DO IS USM
EF75-300mm f/4-5.6
EF75-300mm f/4-5.6 USM
EF75-300mm f/4-5.6 II
EF75-300mm f/4-5.6 II USM
EF75-300mm f/4-5.6 III
EF75-300mm f/4-5.6 III USM
EF75-300mm f/4-5.6 IS USM
EF80-200mm f/2.8L
EF80-200mm f/4.5-5.6
EF80-200mm f/4.5-5.6 USM
EF80-200mm f/4.5-5.6 II
EF90-300mm f/4.5-5.6
EF90-300mm f/4.5-5.6 USM
If Extender EF2x (I/II/III) is attached to the EF180mm f/3.5L Macro USM

lens, AF is not possible.
When using a lens and Extender EF1.4x III/EF2x III in a combination

marked with an asterisk (*) or a lens and extender in a combination
marked with two asterisks (**), precise focus may not be achieved with
AF. In such a case, refer to the Instruction Manual of the lens or extender
used.
If you use a TS-E lens, manual focusing will be required. The lens group
designation of TS-E lenses applies only when you do not use the tilt or shift
function.
138
EF100-200mm f/4.5A
B
EF100-300mm f/4.5-5.6 USM
EF100-300mm f/5.6
H (f/8)
EF100-300mm f/5.6L
B
EF100-400mm f/4.5-5.6L IS USM
EF100-400mm f/4.5-5.6L IS USM
B
+ Extender EF1.4x I/II/III
EF100-400mm f/4.5-5.6L IS II USM
H (f/8)
EF100-400mm f/4.5-5.6L IS II USM
B
+ Extender EF1.4x I/II
B
EF100-400mm f/4.5-5.6L IS II USM
B
+ Extender EF1.4x III
B
EF200-400mm f/4L IS USM
B Extender 1.4x
B EF200-400mm f/4L IS USM
Extender 1.4x: With built-in Ext.1.4x
B
EF200-400mm f/4L IS USM Extender
C
1.4x + Extender EF1.4x I/II/III
B
EF200-400mm f/4L IS USM Extender
B
1.4x: With built-in Ext.1.4x
+ Extender EF1.4x I/II/III
B
EF200-400mm f/4L IS USM Extender
B
1.4x + Extender EF2x I/II
B
EF200-400mm f/4L IS USM Extender
A
1.4x + Extender EF2x III
D
TS-E17mm f/4L
E
TS-E24mm f/3.5L
E
TS-E24mm f/3.5L II
D
TS-E45mm f/2.8
D
TS-E90mm f/2.8
B
C
B
B
B
H (f/8)
B
H (f/8)
G (f/8)
B
B
B
H (f/8)
H (f/8)
G (f/8)
B
B
B
A
A