Just about 4 weeks ago in early November, I traded my Canon 1DX for a Sony A7III. When I got that little Sony Camera, trying to understand the menu and how it works I thought I had made a mistake and at some point I was regretting the configuration on my 1DX for the last 5 years. This said, the Sony camera is extremely fast-focusing in automatic mode. The face recognition and eye tracking are just adding one more layer of technology and it's absolutely fantastic. Last but not least, the files are awesome, the grain is fine and precise, and there is almost no post prod to do. Most of the following pictures were taken with a pancake Canon  40mm 2.8 STM lense mount on a Sigma MC-11 adaptor and taken between ISO12800 and 25600. Pretty impressive in low light-:)