Hi all,
I was just taking some macros using 100-400 L II, with an extension tube and 1.4x III. Of course, AF points were limited to a central 1+4. But, if I place the (elec contacts pin equipped) extension tube BETWEEN the lens and the extender, all AF points are usable. And the lens still works just fine. The minimum focusing distance with 20 mm extension tube is about 7 m. Now autofocus works even over far corners.
I was just taking some macros using 100-400 L II, with an extension tube and 1.4x III. Of course, AF points were limited to a central 1+4. But, if I place the (elec contacts pin equipped) extension tube BETWEEN the lens and the extender, all AF points are usable. And the lens still works just fine. The minimum focusing distance with 20 mm extension tube is about 7 m. Now autofocus works even over far corners.
