Lens adapter ring for RMS microscope lens to M42 Pentax screw mount camera

Roxsen Global

This is aluminum made adapter lens adapter ring for Royal Microscopical Society (RMS) lens on M42 screw mount (42mm x 1.0) camera. Suitable for RMS microscope lens. Options: 20mm, 25mm . Inside Thread: RMS (20mm) / RMS (25mm) Outside Thread: 42mm X1mm After addition, you can also use it on M42 lens adapters, e.g. M42-EOS, M42-Nikon, M42-Sony, etc.