Excerpt: This is a great lens, except that it didn't suit my purposes and I returned to buy a 70-200 f\4 L IS instead. Here is why.I wanted to have a high aperture lens to take portraits of my 3-year old. At f\2 I would have a nice blurry background.
Pros: Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh
Summary: If you are on a budget (who isn't?), and you shoot a lot of schoolkid court sports, this is a great option. As a fast lens, it allows you to do without flash (and who would want or be allowed to blind the players, anyway?).
Excerpt: This lens does a great job at getting reasonably closer to a subject without having to be in their face to get a good shot. Lightweight, great depth of field. Solid prime lens. I wish the F-stop was 1.4 like it's 50mm cousin to do even better in low light, but I'm sure that would kick the price up...
Summary: This lens is a great buy for the money. I can't afford a super "high end" glass, and after reading the reviews thought I'd give this one a try. It turned out to be a great addition to my arsenal; whether I'm shooting stills or video.
Summary: Good bang for the buck -- it's like the 50 1.4's Uncle Jim-Bob. Unfortunately, it's a somewhat awkward length, at least on full-frame, and I ended up selling it a few months later because it graced the front of my camera just once in that time.
Excerpt: This is a pretty decent lens for the money. I wasn't sure how much I'd use it so price was important to me. So far so good. Easy to use, lightweight, sharp. I'd recommend it to anyone who doesn't want to break the bank but wants a good macro lens.