Review Lens for Phone

Great idea, but do not work properly. Unfortunately the edge of the lens mount is always visible on the screen (like a black halo), because the cell phone cameras are all working with wide angle. I have used several models and always the same. The effect disappears only when you use the digital zoom and a little "pure zooms". But you will actually be avoided because the image loses quality. In the middle of the image is sharp and perfectly and the lens do here what it promises. Who makes no effort to edit each image in the end (border) gets a good telephoto lens for his mobile phone.