I made a very bad experience with the Sony MSACM2NO adapter. After I had the adapter with a Memory Stick PRO Duo inserted into a Sony DSC-W1, the adapter blocked in the slot of the camera. Since I did not want to damage the locking mechanism in the slot, I did not pull the adapter out with a tool. So I had no choice but to open the camera to get the adapter out again. So beware, the adapter should be introduced stiff into the card slot, then better do not use.