ChrisEnnis

I've put my 5DSR through Reikan Focal together with several lenses. The MFA values are all single digits. Real-world focus issues are in my case, most easily attributed to "probable user error" as ...

I had similar problems. My solution and what I understand the OP is doing: (1) Good tripod + head - tick (2) Remote release - tick (3) IS off - tick

https://www.roundshot.com/xml_1/internet/de/application/d254/d255/f256.cfm

I had something similar with a 24-105/f4 that I bought with my original 5D. It had a hard life being used constantly. Before it died it exhibited these variable exposure issues, even on full manual. ...

I thought it was 0x0100 after a 5d1.

An "AA-G" button: It flips into Liveview, sends the resulting image back to Google for AI analysis and which returns instructions on how I can adjust what is happening on the camera into an Ansel ...

Yes. Mine still takes excellent photos. Chris