From Alin Popescu’s website:
Back in 2018 I’ve discovered a bug in the new firmware update of the original A9. It was firmware 3.0. Somehow it messed my settings on the FN button menu and showed the option Angle Setting. I’ve posted about it here.
A7s III was not yet released back then, and I assumed it will be a camera with global shutter. What did I know that we have to wait 5 more years to see it coming in the form of the A9 III.
Funny fact 1: maybe the programmer that released the firmware for the original A9 with this bug chose in the export instead of A9 firmware 3, he chose A9 version III
Funny fact 2: back then, I was a Sony European Imaging Ambassador in Romania and after I’ve published the article on the blog, a contact directly from Sony Japan asked me kindly to take down the article (no explanations given, he said it’s just a bug quickly to be fixed). I did that, but didn’t delete it, just unpublished from WordPress. Today I found it again, after a long search since I didn’t remember exactly when it happened.