When moving from Canon system to Sony earlier this year, I didn't know much about the fly-by-wire focusing system on lenses. The first Sony lens I purchased was the Sony Zeiss 24-70 F4 lens, and I loved the lens except for the fly-by-wire focusing system. Whenever I'm getting focus manually, I would get frustrated. I did some research and discovered most Sony E-mount lenses are fly-by-wire. So, ..