FISH-EYE LENS Adapter für 49mm Gewinde Objektive OM10, ME Super, K1000, X-300 etc.
If your lens has a 49mm front filter thread, this will fit onto it. It can fit other lenses with a 'step up' or stepping down' ring: 49-52mm (for example) etc. A compact fish-eye lens adapter. Electronic – 10.