Summary: I have to agree with Jane Tilley "Jane" - avoid this lens! it served me well for nearly a year, but the focus ring gave away. Now lens is useless. Repair cost is higher than cost of purchasing it, so you can basically bin it. It is a common problem with this lens - it is making a rattling noise and can't autofocus - please see youtube videos and google it. This lens will not last long!
Summary: I have been using this lens for 2.5 years now. It is a good quality build. I have mainly used it for food and travel photography. travel pictures come out sharp and food photographs have the desired blurring effect in the background. Overall I am quite happy with this lens.
Summary: I have given this lens 1 star as there is a common fault that that means the focus ring gears slip meaning that you cannot manually focus or auto focus, this will cost you around £200 for a repair so after this fault occurs you may aswell bin it. However the results before this happens are good but it is still not worth the cash seeing that this is extremely likely to happen. please avoid so you dont have to go through what i have!!!
Summary: Its light, plasticky and has a rather poor maximum aperture at the longer focal lengths. However, it does have a better than usual range of focal lengths and comes almost free with many Sony dSLRs. Stopped down performance is OK and it works well for general use in good light. Most other brands of entry level kit lens are criticised for similar inadequacies so this probably compares.
Summary: This kit lens come with the starter Alpha cameras A200, A300 etc. On the plus side it's a quick lens (focusing), small and light so doesn't add unnecessary weight to the camera. On the downside the focussing ring rotates which causes filter problems, plus annoyingly the rubber grip is ribbed and catches dust easily. The pinch cap is good to aid removal when the sunshade is in place. Worth it as a start lens but consider an older Sigma if you want to step up a gear.
Summary: First thing first, this is a decent lens. It offers a much nicer focal range than other kit lenses and it does pretty well in terms of sharpness. It's barrel action is smooth but it' focus ring does rotate, making it a pain to use a polariser. It does well as a budget lens, but there are better- for a higher price. If you're a beginner, just starting out with an Alpha 200 or 300/50, then this lens will keep you satisfied for a long time.
Excerpt: This is the standard lens that comes with the new Sony Alpha 100 digital SLR camera (dSLR). It fits on to a the Sony a-mount or for those who have one of the old Konica Minolta Dynax camera, it will fit in the KM-mount. However it is a digital only lens so film purists will not be served well by it. Taking photos with this lens using the Sony camera is a dodle.