I would think the Inon UWL H100 28M67 type 2 will work with your the LX7 with the nauticam housing. It works just fine with the LX5. Call reef photo they may know.
Ken
Yes I think that one might be the only lens that works OK. The LX7 has a different shape sensor than the LX5 with the same field of view in any shooting mode
Another fellow diver has the lens and the same housing but has not tested it in water yet
Nice job! Glad you like the LX-7. Its bright lens really useful even on cloudy day. I do notice if you shoot photo in i.A mode, it take a while for the white balance to correct itself. I'm just starting to play with this camera in depth. The Manual focus nob is quite tricky to use. Will get my housing next month as I'm still clearing my holiday bills!
Interesting camera as the image looks brighter than how it looks with your naked eye. I would believe my eyes are f/1.8 hahaha
The good news is some controls are actually easier with the camera in the housing that on its own, really weird