hi jack ,
I do have the inon protector II dome port
Is it possible to use that one for the 7-14mm 2.8 with extension rings...??
We tried it in the Nauticam E-M1 housing and it will require that you add the camera body first into the housing, then the lens as with the 12-40mm. But it will need a much wider port body to fit the lens and a zoom gear. My guess is the the Nauticam N85 (MIL) to N120 (DSLR) 40mm ext adapter with zoom control, plus about a 50-60mm N120 extension and Nauticam 180mm N120 (DSLR) dome (or larger) should work fine. But Nauticam has not released a guide yet as they are still testing these new lenses.
Sorry, I wouldn't have any information about the use of that setup. But you could set it up like the Nauticam and see how it works.