Jak Crow
Contributor
Not clear on the Oly lens port adapter. If it could be used in conjunction with the Oly to Zen dome port adapter, that would get my e-m1 into the water sooner.
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The other way to go is to have a backup body for the type of housing you are using rather than a complete system. I have one Nauticam NA-EM5 housing and two Olympus EM-5 cameras. One camera is setup for the housing and the other is ready to shoot on land. Chances are that if you flood the housing and trash the camera the housing will still be usable once it is field serviced. I see several floods a year during my several weeks of workshops and we have never had a housing that could not be salvaged and reused. This is not to say that it couldn't happen but all of the floods so far have been pilot error. The new Nauticam vacuum system makes the chances of flood even lower.
I have sold my EM-5 system and I will be moving to the EM-1 system soon. I should have a backup body in time for my Philippines trip in February and plan to carry a GoPro as well. Last I have lost more equipment while traveling to theft than to flood so if you don't have the two systems if different locations you may still be SOL.
Nauticam has also announced the gear and port for the Olympus 12-40mm F/2.8. The recommended port is the 7" port also designed for the Sony 10-18zoom for NEX. This is not a lens for everyone and not a replacement for the 12-50 zoom in terms of how it will be used. This lens is for advanced shooters who do pool work like fashion, large animal photography, mid range wide shoots with shallow DOF and more. It is one more tool and not meant to be a quasi macro lens like the 12-50 with macro gear.