Have you seen the MTF charts on this sucker. It looked great, and I was super excited to get my hands on it. But alas, my copy had some very strange focus-shifting issues. It seemed like things were either front focused on back-focused depending on different apertures; I couldn’t put my finger on it until stumbled across this post at diglloyd.com. It’s a real bummer too, I was hoping for something to scratch my wide-angle itch.
Oh well. Amazon FTW!