Great lens for portrait on full frame camera; I consider it good wild open, stopping down a little bit it's very sharp. Build quality is similar to 85/1.4 though I think the 85 is slightly better. Defocus control is something I don't use, and the DC ring is a little bit easy to turn by accident- the button lock on the ring is too easy to be pressed. The modern 135 retains the built-in hood from the manual version, which is a quite welcome feature.