Nikon-C Mount Adapter
For using Nikon F mount (except DX-format) lens with C mount (16mm) film devices.
You should remember that the pusher with the fixed ring doesn’t work, so diaphragm control of the lens is set manually. It is possible to use Macro rings and other accessories.
Put red marks of the adapter and lens collar together.
Turn the adapter anticlockwise till the fixative click.
Set the Nikon lens.
To remove the adapter you should unpress fixative pin and turn the adapter clockwise.