Excerpt: I'm using this with the Sony LAEA4 adapter on an A7. This lens seemed a very good low-cost choice for the portrait focal length. The lens is compact and very lightweight due to the extensive use of plastic (even the mount is plastic). The lens focuses accurately via the adapter and is sharp in the center wide open, which works well for the portrait use this lens will see. Very hard to top this lens for the price.
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.
Best choice for a prime short telephoto for the A7r, for the time being...
Larry Monteith, Amazon
28 March 2014
Summary: OK, it is not as fast as I would like, but it is very light weight. This becomes more important because I have to combine it with and adapter to use on the A7r. I'm using the LAEA3 adapter, the one without the translucent mirror. The autofocus does work, though not very fast. Focus speed would be faster with LAEA4, but more weight, money and having to keep that mirror clean... I simply use it on manual focus most of the time.