The Macro Wide Lens 1 (MWL-1) when paired with a supported lens and port provides a massive 150 FOV (at 60mm equivalent focal length). There are several mounting options for this lens. This particular flip adapter mounts to supported M67 threaded ports allowing the MWL-1 to be securely latched in place for use or swung out of the way when not in use.

How to Install the Nauticam MWL-1 onto the M67 Flip Holder for the MWL-1 from Reef Photo & Video on Vimeo.

Note: Pictured with macro port and MWL-1, sold separately.