The auto-focus drive on the lens that came with my A200 broke (after 2 years and about 25,000 shots mind you) and I needed a replacement. I believe this is the lens that the newer A290 and A390 come with as standard so this was an obvious choice. I was very pleased with the price, very pleased with the speed of delivery and very pleased with the lens. It's much lighter than the original, but yet feels somehow sturdier. It gives a slightly wider angle of the subject, and handles noise much better. Both the zoom and auto-focus are smooth and effortless. One of my better choices!