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Solution
The availability of AF when an extender lens is mounted is shown below.
| AF Area Selection Mode | Type of extender | AF availability |
|---|---|---|
| All (Except Center) | EXTENDER EF 1.4x | When any of the extenders shown to the left are mounted on a lens with a maximum aperture darker than F4, AF cannot be used. |
| EXTENDER EF 1.4x II | ||
| EXTENDER EF 1.4x III | ||
| EXTENDER EF 2x | When any of the extenders shown to the left are mounted on a lens with a maximum aperture darker than 2.8, AF cannot be used. | |
| EXTENDER EF 2x II | ||
| EXTENDER EF 2x III | ||
| Center | EXTENDER EF 1.4x | When any of the extenders shown to the left are mounted on a lens with a maximum aperture darker than 2, AF cannot be used. |
| EXTENDER EF 1.4x II | ||
| EXTENDER EF 1.4x III | ||
| EXTENDER EF 2x | When any of the extenders shown to the left are mounted on a lens with a maximum aperture darker than 1.4, AF cannot be used. | |
| EXTENDER EF 2x II | ||
| EXTENDER EF 2x III |