I sent Sigma an email (info@sigmaphoto.com) about the issue. They said I'd need to send in the lens to match the firmware. I'm not sure if this is just some canned message or they can actually do something to make it work with my camera. Either wa...
I updated my R7 to 1.7.1 from 1.4.0. I was able to use my 120-300 Sport on 1.4.0, but after updating to 1.7.1, the camera doesn't recognize my lens at all. It behaves as if it's a fully manual lens with no electrical contact. No errors or anything...
