Believe it or not, I went and buy this lens months ago and went thru 4 copies and still no good. At the end I just asked for a refund. and the worst thing is that this is "Made in Japan". The next batch would be from China.
I really wish I can get a good copy with this lens.
1st copy: Lens front focus and deep scratch at the metal mount.
2nd copy: A big debris inside lens (back)
3rd copy: Dust inside lens (front)
4th copy: Lens front focus badly
I seriously ask for prospect buyers to check their lens thoroughly and buy from a local shop so you can exchange easily