Originally Posted by Sinh Nhut Nguyen
I used to have an EF 50 1.4 but the AF motor gave up twice on 2 occasions on 2 copies. That's 1 reason I'm not gonna go for it even though it produces outstanding IQ. Would like to try Sigma though the downside is AF issues...might go for MF on it. Zeiss on the other hand, has great build quality but haven't heard any positives of its IQ since its release on Canon mount.