Still mourning my beloved Subal housed D500, I have to think about next steps.

I don’t want FF and there’s no Nikon Z equivalent to a D500. So I’m thinking M43 and the Olympus OM-1

I thought I’d switch to Nauticam. Paired with a 45 degree finder.

Then an Olympus 60mm macro and FP.

Tokina 10-17s are hard to find so I’m thinking a 100mm Zen glass domeport with either the 8mm Pany or 8mm Olympus.

Various articles I’ve read suggest the 8mm Pany works better in a Zen100 dome than the Olympus. But maybe I’m missing something?

I’m not sure I really want to head down the Canon 8-15/adaptor route. I do have a Nikkor 8-15 but understand that’s hard to set up with an Olympus.

So that’s where I’m at: saddened with slight trepidation staring into the barely known.

Thoughts welcome to add to excellent advice from Chris.

Thanks!

You’ve described my system (well, the camera body is a generation older). I’ve been very happy with it. The 60mm macro lens is fantastic and produces top quality images, add a +5 diopter and you’d want for nothing. I use a Nauticam port with the 8mm fisheye and find nothing to complain about there either. A 12mm rectilinear will also work behind that port for a bit more reach. I’d guess that compared to a Subal the Nauticam housing won’t feel nearly as refined, but it’s plenty ergonomic for me. Good luck shopping!

Camera therapy for PTSD? Sounds right to me. I've used the 8mm Panny with the 4.33" Nauticam dome for many years on a series of Olympus bodies, and have never been disappointed by it. Although the OM-1 (mostly, at least) comes with the LM-3 mini-flash, it depends on the camera for power; I've found that the O-Turtle triggers work well (I have the same flashes as you . . . had). All three Olympus/OM macro lenses are excellent; I'm currently enamored of the 90mm, but not everyone is.