Ilya E , Oct 27, 2010; 07:21 p.m.
Well, I have just received the Sigma and took it for a spin. I am going to cut to the chase. I understand now what others meant when talking about Sigma AF. IT SUCKS. Wide open at MFD and near, it needed +20 MA (maximum on 5DII) and at infinity an near, it needed +13. I am going to post a few test shots later tonight where you will be able to clearly see how bad it's AF is. Tomorrow I am going to test both Sigma and Canon 85L together. But from what I saw so far t looks like 85L has much better bokeh as well.