Latest developments in reducing carry-on luggage made me to almost abandon my Hugyfot D800 rig for size and weight size.
Is use the D800 only back home in Italy as the weight and size of the whole rig incluing flat and mini dome is basically a 50lbs luggage.
As i am not a pro and don't sell my pictures or d strong crops on them i went with the Panasonic Lumix LX-100 as this camera offers what need.
I have 2 housings, a cheap Meikon housing for my daily work as instructor and guide and a Nauticam housing with twin Z-240 strobes and +10 SubSee diopter.
The Panasonic G4 was a option, but as the camera itself is not really so much smaller as my Hugyfot D800 housing and i had to invest a substantial sum in camera, housing and ports
i took the decision towards the LX100.
I have the Maikon housing clipped on my bcd with a Cetacea strap and the housing tucked under my armpit if not in use. A small and handy solution for unexpected encounters.
If i wanna go more "professional" i use the Nauticam housing with a 5000 lumen videolight and the +10 diopter on a flip holder and if it's something really important
i mount the two Z-240 on the UCLS arms to get perfect photo lighting.
The same/similar size and quality is obtainable with the Canon G series or the Sony RX100 series (or some newer cameras i am not aware of)