The M42-NEX Lens Adapter allows M42 lenses to be used on Sony E mount cameras. With the M42 fitting, photographers can easily attach their M42 lenses to their Sony cameras, expanding their creative possibilities without the need to invest in new lenses. This adapter is a practical solution for those looking to use their existing M42 lenses on their Sony E mount cameras.

Non AI stuff - I bought this recently and when I excitedly went to mount it in my Sony NEX5R ……….there was one there already. If that’s not a reminder to thin down the collection - see other listings - I don’t know what is! 🙃