I have discovered a potential problem with Sigma FE lenses on the Sony if you want to put it on a Gimbal. due to the nature of the length of the lenses, a lot of them won't balance on a gimbal even if the payload supports it. The centre of gravity is too far front heavy meaning the camera or the lens will knock it against something.
I tried the Sony A73 with the 35 Distagon on a Feiyu A1000 this week and it barely balances, the mounting plate is so far back it was holding on with barely like 2mm of grip and the eye cup catches the back motor if you tilts to look up. I can't see how the Sigma will work with that gimbal at all, or any of the sigma lenses to be honest.