Hi, here's my first post on the blog!
) I just received my BMCC last week in Montreal,CA. I was also planning to buy the 11-16..I went to the shop & tried the dx I, the dx II and it wasn't focusing at infinite. I know it is possible to send back your BMCC to BMD but I decided to buy the sigma 8-16 4.5-5.6...Not fast but does the job for most situations, focus to infinite & is a lot wider(19mm equivalent vs 25mm for the tokina). Hope this help!