Compared to the other lenses I own, the focus ring on this one feels extremely dampened in MF (about the same as the 120 macro) and the AF is really slow and sounds like the motor is straining. I've talked to two phase one reps — one has said this is completely normal for this lens, and the other says they've never seen a lens perform like this before. I figured I'd see if anyone else here owns this lens and what their experience has been with it, because this seems off to me.
video of focus comparison between the 55mm LS and the 80mm LS:
https://youtu.be/CaSErf4HFDs