axl
beware, there are purists out there who don't like this lens. I got into a little "spat" with a forum member who said the lens was unremarkable, soft etc.
There are reviews in the lens data base, biggest "complaint" is that the main barrel is plastic, as is the filter attachment thread, but considering what this lens will be largely used for, I don't see that a problem. In fact one member suggested just purchasing a cheap filter, to remove the element and leave the threads on the lens all the time (to get metal threads) stacking filters should not be a problem as this is a full frame lens
check the following 100% crop shot at F2.5. this is jpeg right out of the camera no PP at all