Mount Adapter Dual Purpose M42/C-NEX

Dual purposes:

1. attach C mount CCTV lens to Sony Nex camera

2. use this adapter with M42 screw mount helicoid (cannot focus properly if not using together with M42 focusing tube helicoid)

Specifications:

Front mount: M42 screw mount , C mount

Rear mount: NEX E mount

Focus: manually

Material: aluminium alloy