Fotasy AM42M M42 Lens to Micro M43 Mount Adapter/Macro Focusing Helicoid This macro focusing Helicoid tube allows M42 lens to be used on Micro 4/3 camera body. This macro focusing Helicoid tube is made with standard M42 mount and is made with light-weight alloy. The 42mm side is female mount and M43 side is male mount. It can works as a standard M42 - M43 adapter This Helicoid tube offers a total of 32mm movement distance for lens focusing.