Summary: I wish sony make this sharpness lens in other sizes! This lens I don't care about the plastic or the faster focus. This is my favorite lens I will never sell this lens. I suffer from pain in my wrist and this light lens is my favorite for my 24mp Sony A7 and the Sony A 57. The only thing negative is the lens hood, I lost one already because it's comes off very easy.
Summary: Fantastic lens from Sony. This stops down to f/2.8 creating very creamy bokeh. I use this both on my Sony A33 and my Sony A99 (full frame) and get amazing pictures. Tack sharp focus. This lens is comparable to what you would see in a much more expensive model.
Summary: The lens build quality is very good. Focusing of the lens is smooth, sharp and accurate. Bokeh affect of the lens is very smooth, sharpness is excellent from corner to corner of the frame and contrast is impressive. Even if you have 50mm lens, this is a good addition to your portrait lenses. Very happy to have this lens and definitely recommend to others. You will not be disappointed with the performance of this lens.