MFA Question

I did a fairly extensive search here, but could not find the answer, even though I think I saw it somewhere, but did not pay much attention. So I have to start a new thread.

Do the modern cameras do MFA on both ends of a zoom lens? Or if it is only one end, does its adjustment break the focus of the other end of the lens, which may have been good before the MFA and should not be touched?

It depends on the camera. 5DIII 6D do both. 5DII 7D only one. 60D none and the 70D I believe will do both.

Lbsimon wrote in post #16131780
Or if it is only one end, does its adjustment break the focus of the other end of the lens, which may have been good before the MFA and should not be touched?

Generally speaking if you can only adjust one end, you do it on the long side as the short side's greater depth of field should compensate for being slightly off. Your mileage may vary, though.

joeblack2022 wrote in post #16131817
Generally speaking if you can only adjust one end, you do it on the long side as the short side's greater depth of field should compensate for being slightly off. Your mileage may vary, though.

Great observation! Thanks, I did not think of that.