"Clarity and color is amazing in low light situations. Also depth of field is amazingly tight at 1.4. I haven't had problems with the autofocus speed. For the price this lens is amazing." bhphotovideo.com
"This lens has quickly become my default lens. It's very versatile, and the system allows focus to be tweaked manually after auto-focusing. For the price you can't beat it." bhphotovideo.com
"This lens is really great. The picture quality is awsome. It can make great proxy. I've shot a picture of a spider and i can see the hair over his eyes." bhphotovideo.com