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 I did that, but didn’t delete it, just unpublished from WordPress.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.