peteto wrote:
I have the same setup 5DIII, 100-400L 1.4 III telecoverter, and I just finished calibrating them. Mine does autofocus at f/8 with the center focus. Is the autofocus not working period? Hate to ask, but the switch on the lens is set to AF and not MF?
Thanks for your thoughts. I think it is my firmware that needs updated. When you calibrated your set up, what microadjustment did you have to make at the zoom?
That's going to be independent to the lens and camera if I'm not mistaken. Someone elses AFMA most likely won't work with the next persons.