Every lens I have has both AF/MF .. but I'm shopping for a 2.0 or 2.8 wide angle. I was considering Rokinon 12mm 2.0 for my M5. Then, although expensive, I read or heard something about the Zeiss 15mm 2.8 Distagon working with some kind of "light" on a Canon. I haven't found video or web page explaining yet. And one camera store employee in Portland couldn't explain how this focus confirmation happens. Just said they looked up a note saying "light" ..
Anyone familiar? Is there a separate light? Does the center focus point turn color when focus becomes spot-on while manually turning the ring? Other?
Presently, I use a 5D Mk iii, 5DS and M5
It there is a special feature, is it enabled from the menu? And from what part of the menu? Thanks ...


