I have edited this review but it won't let me change my star rating. I had given it four stars but would move up to five stars since I had thought that the lens adapter that was mentioned in a previous review was missing. In reality it was hiding among the packing peanuts in the box. Overall, I would say that I got my money's worth. There is some distortion in the lens but since I am creating panoramas from the pictures, it doesn't really matter. It is only noticeable when there is a horizontal or vertical line near the edge of the picture. My panorama software didn't have any real difficulties with it, even considering that I didn't shoot my quick test pictures with a nodal head. I can't see any noticeable darkening around the edges.