I've been using my Sony A7R2 + Metabones IV with Sigma 35A and 50A as well as the Canon 16-35L for 2 months now. It's been working great, until last wedding the camera would not let me autofocus. I checked the switch -it was correctly set to AF, and the Focus Mode was greyed out in the Function Menu.
I checked online and there was a quick fix to unmount the lens, hold the button on the metabones adapter, and reattach the lens and it would enable autofocus again.
I had to do this about 4-5 times for the rest of the day. Anyone have this problem before and/or a solution to this? Is it firmware issues? I haven't updated it since I bought it from Amazon.
Thanks.