Fotodiox 10-Reverse-nikon-49 RB2A 49MM Filter Thread Lens, Macro Reverse Ring Camera Mount Adapter for Nikon
By mounting the lens backward on a camera body, you can create amazing macro images. It is extremely fun to turn you lens into a macro lens. You can mount lenses with 52mm filter thread size of any brand. It will be more fun to use on lenses with aperture dial to adjust aperture.