"Seems like a pretty good lens. Picture is clear from what I've seen. I use it mostly for film on my Canon T2i. Does get a little blurry at 300 zoom. But overall I am satisfied with the purchase." bhphotovideo.com
"There are two things that impressed me as soon as I started to use it. It's sharpness is great at all focal lenghts and all apertures all the way to F16 ." bhphotovideo.com