March 8, 20169 yr 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.
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May 15, 20169 yr It appears that the button on the adapter might be stuck in a permanently ON state. If you are stuck in Advanced mode because of this you will get a focal length display on the LCD when you zoom the lens and you will get a distance readout on the LCD as you turn the focusing ring but you will have no AF.
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