TheLensGuy wrote in post #16146985
What I meant was, if lens A is sharper than lens B, using live view, it means lens B has some sort of an inherent problem, which cannot be helped with the MFA the body will do. Is that correct? I didn't mean factory calibration, I meant the manual MFA calibration we do.

What I meant was, if lens A is sharper than lens B, using live view, it means lens B has some sort of an inherent problem, which cannot be helped with the MFA the body will do. Is that correct? I didn't mean factory calibration, I meant the manual MFA calibration we do.
Not necessarily an "inherent problem", because it may still be within the manufacturer's tolerances, but at the very least lens B isn't as good of a copy.