4 out of 10 points and not recommendedsolid, well madevery, very soft f2.8- f5.0, loud motor
To be honest I am not so sure you can go by my opinion because I am beginning to believe I got a dud, especially after reading other users comments.reviewed December 4th, 2009
It wasn't until I got my 7D that I became aware of the softness in this lens. It's almost like the camera is not focusing properly. That's how soft it is. But starting at 5.6 it begins to sharpen up. So it is not a focusing problem. All of my other lenses are super sharp.
I can say that if it was sharp wide open that I would really like the lens. I bought it because of the f2.8 factor which turns out to be worthless. You should note that I am not super picky about sharpness. But this is way too soft even for me.
If you are willing to take a chance at getting a dud then maybe the lens is a good choice. I just wish I had been aware of the problem earlier so I could return it. I guess it's buyer beware.
It does say something about using high quality lenses on the 7D. I never even noticed the lens' softness on my 30D.