N120 Extension Ring 40 II

This is the 40mm N120 extension ring, for use between an N120 port system and a Nauticam housing. It adds 40mm of length to the port assembly, accommodating longer lenses or specific port configurations.

The extension ring uses the standard bayonet mount, seating cleanly with a twist. A red safety lock engages to prevent accidental removal, keeping the assembly secure even with gloves. This allows for precise fitment without adding complexity to your rig setup.

Select the correct extension length for your lens and port combination using the compatibility finder. Incorrect extension length can cause vignetting or prevent proper focus, so confirming the fit is essential.