The Bayonet Mount Converter II is designed for M67 threaded ports to use with wetlenses.
This works with both 1st generation bayonet mount optics as well as the new 2nd generation such as WWL-C.
This is the "Housing part" that sits on the M67 port of the Nauticam housing.
Screw this on with the included tool, and be ready for mounting your external lenses.
The adaptor screws onto the M67 port and convert it to an easy-to-use snap mount.
(don´t forget a lens holder for placing your lenses while not in use)
