Summary: This is going to be my go-to lens for portraits from now on. Buttery smooth backgrounds, crisp subjects. You'll want to use a tripod as there's no IS, unless you're using a bounce flash... but other than that this lens is simply awesome.
I think this is a great lens, especially if you are looking to use ...
E. Sainz, Amazon
23 January 2015
Summary: I think this is a great lens, especially if you are looking to use it for portraiture, where this lens really shines on a full frame camera. I will probably be in the minority here, but when I got my 5D MIII, I purchased this lens along with the Canon 135mm F/2L for a side to side comparison.
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