I bought this new and immediately slapped a cokin 67mm UV filter on it to protect the lens.  At some point, the filter got a little crack in the corner from use, but the lens itself seems perfectly fine and is not affected by the filter problem.  You can see that the camera end of the lens looks pristine.  I used this lens a lot and it has some external surface wear, but was working great when I last used it.  This is a really nice lens and I wish I could keep it but when I hold it in my hands it does not bring me extensive joy so it must go (thanks Marie Kondo).  Plus I don't have a working camera anymore so not too useful for me.  Thanks for bidding!