Tom - I think the quality issue with Sigma is a little in the past. I had heard the same thing too before I bought the 28-200mm lens. Wasn't going to get it, but I came across it brand new for under $150 on eBay and couldn't pass that up. I am glad I didn't. It was a solid lens for me. I bet that I could get better photos out of it with my 10D if I send it in and have it calibrated for the body. I'm thinking of doing that anyway with all my lenses. It was a great lens for my film camera. -=>Donald