Quote Originally Posted by neuroanatomist
and one of the main drivers was AF microadjustment, so the 60D would not have been a good option for me.

I see that Danny also uses a Sigma 30mm 1.4. A friend of mine uses it as well and when he found out he could micro adjust it with his 50D he was even more in love. Micro-adjustment can be a very nice thing. I personally use it with my Sigma 50mm 1.4 and it's an entirelydifferent world after adjustment.