Any OM1 housings using OM-D port mount?

[whsmac]

With a 170mm OM-D dome and the 37mm port adapter, I got vignetting with the 8mm fisheye. The Olympus 7-14 should be fine, depending on which dome you use and how much extension it needs. My dome is an Inon, and I went from a 2" extension ring on an OM-D housing to a 1" with the port adapter / AOI housing to use the 12-40; I don't have the 7-14 any longer but it should be the same.

I don't believe there is a way to use a PEN dome with the 12-40, O7-14, O8-25, PL8-18, etc. It's just too tight to get a zoom gear in there, but someone might be able to figure out something using math and a 3-d printer. That whole exercise is why I switched to the 12-45/8mm PEN dome combination. I lose the ability to shoot a decent rectilinear wide, though. Not so decent options like the Panasonic 7-14 and O9-18 work, but at the cost of image quality (in my opinion).

Thanks for your detail answer.