Summary: I purchased this lens to use with Sony a57 in May 2013 and have been happy with the results. The range is great and has produced good results. As others have pointed out, there is noise from the auto focus when shooting video.
Summary: I bought this lens used for a trip to allow me to stop the ever changing of lenses for different purposes. I have taken lots of applications and am in heaven with this lack of change. It has exceeded my expectations as an avid amateur photographer.
Excerpt: I've had this lens now for a few years on my alpha55......now on an alpha65. A major step up from the kit lenses and i use it 99 percent of the time. Sharpness has been overall very good and I use It with confidence. City scapes have shown some barreling or pincushion which I could correct in photoshop. My last trip to some ruins in cancun presented me with a real problem with this lens. The Mayan ruins were amazing , extensive, and of great photographic interest.