I don't see an obvious 3rd-party-lens area, so I'll try here since it's on a D7200...
I have a few-month-old D7200, and a few-years-old Sigma 50-500. The O/S doesn't work on the D7200, and it's going in for the firmware upgrade...
BUT, I have a 4-HOUR-old sigma 150-600 Contemporary, and as...