This is a Kenko wide-angle lens. It can be used with smartphone and computer cameras. I am selling it now because I no longer use it after switching to a smartphone with a wide-angle lens. The lens is in beautiful condition, with no scratches or dirt. The lens is a clip-on type and can be attached to the camera part of a smartphone or computer. The clip opening width is about 3cm, so it is compatible with most smartphones and computers. If you have any questions, please feel free to comment (^.^)