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: This lens is literally a fraction of the weight of my Tamron 17-50/2.8 and weighs less than the 50/1.4. The SAM motor is definitely nowhere near as fast or silent as an USM/SSM based lens. However, this lens also weighs next to nothing. Three of the A77 batteries will weigh more than this lens, if that gives you a sense of how light this lens is. I made some test shots after receiving the lens in the mail. The image quality coming through the lens is nice.
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.
Excerpt: for anyone looking to add a nice portrait lens to their collection, this is the lens you want...look at the graphs, look at the online reviews, then look with your own eyes...shooting into the light cropped in at 100%...you will get a little magenta CA that's easily taken care of in post...and the AF tends to hunt in low light situations, the lightweight feature makes it great if you're doing pet or children where capturing a moving subject is part of it..