JJC RR-2A Macro Adapter Ring is used to mount a lens in the reverse position on a NIKON SLR/DSLR camera body. When shooting at reproduction ratios greater than 1X (life size), mounting the lens in reverse improves image quality and increases the working distance from the lens to the subject.
The RR-2A can be used with any lens having a 52mm filter thread, however if the lens is to be mounted directly to the camera via the RR-2A,the lens should have a focal length of between 20 and 58mm.
Lens used should have aperture ring in order to control the amount of light entering the lens. Nikon AF, AFD, Ai, Ais lenses are recommended. Nikon AFS G lenses without aperture ring are not recommended.
JJC RR-2A replaces NIKON BR-2A.