Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
I'm still learning my system but using 2X Inon S2000 on a full Nauticam rig. The one thing I will tell you is don't bother with the CMC-1 or SMC macro lens - they are way too much for this camera unless you are really really wanting to do super macro. Getting a focus lock is nearly impossible for me underwater. I picked up a CMC-2 but haven't given it a try. Thinking more than likely I will go back to my Inon UCL-165 & 330 lens though - these are a carry over from my previous S95 rig (along with the strobes) that I knew how to use. The Gx7II can do good macro work natively and with the larger sensor, cropping in to get the small details works much better than what I was getting with the old S95. I was using a RecSea previously but the Nauticam housing is really sweet. Expensive yes, but sweet. Having the shutter trigger makes it a joy along with the peace of mind you get with the vacuum system.
I shoot a G7X in a Nauticam housing as well. No problems with the CMC-1 as an external lens, I get some great shots with it. It does take a little bit of patience though.
Totally agree on the Nauticam housing, it’s worth the investment. Especially with the vacuum system.
Lance
Did you consider buying a DSL with a Nauticam housing versus the G7X/Nauticam?
One thing that stopped me from buying a Nauticam for my G7X Mark II was that the housing is about 2.5X the price of G7X Mark II here in Hong Kong.
A Nauticam housing for pro-sumer DSL (like a Nikon 7200) is about 1.5X – 1.75X