Hi - I'm David from Chicago. I've been diving a number of years, but just got serious about UW photography about 4 years ago. Am shooting a Sony a7RII with Nauticam housing. Unfortunately, having back problems and might have to downsize. Will decide in the next 1 to 2 weeks. If I do, will be selling the a7RII Nauticam system (housing, ports et al) which has under 50 dives.