Currently using a WWL-1 with native M67 threads. I notice that Nauticam has a special flip adapter for the MWL-1 which looks to be the same bolt on flange. The lenses are the same weight/buoyancy.

Any reason it wouldn't work? It would let me stay away from going to the bayonet mount and also let me have a diopter available.

The WWL ports are pretty big compared to the MWL. Typically you put a mount on your camera arm if you want to remove the WWL during a dive.

The weight is the same both in and out of water. The MWL-1 is actually longer and only 22mm less diameter.

23 hours ago, Grantmac said:

Currently using a WWL-1 with native M67 threads. I notice that Nauticam has a special flip adapter for the MWL-1 which looks to be the same bolt on flange. The lenses are the same weight/buoyancy.

Any reason it wouldn't work? It would let me stay away from going to the bayonet mount and also let me have a diopter available.

The Nauticam bayonet mount works better for me, and quicker to remove than threads. It would seem a bit unwieldy to use on a flip diopter, but it may be okay underwater, just more awkward handling the kit above water. I’m also not certain how closely the WWL-1’s rear element will sit against the port glass. I haven’t tried it, though I have both the bayonet and a single flip holder.

The holder I'm referring to is specific to the MWL-1 but looks like the same flange size as the WWL-1.

I don't think I'd try it on the regular adapter.

Nauticam replied saying that although they will physically bolt up the alignment of the WWL-1 is much more critical than the MWL-1, which was something I wasn't expecting.

Saved me a $550 experiment however.