Thanks for the info. It's always interesting to see how NEX users adjust to the lens situation.
Picked up a N7" dome off SB last week for a good price. When it arrived, I was sort of shocked by how much bigger it is than my 4.33! Better than those huge 8 & 9" SLR monsters, but still BIG in comparison. At least now, I have both domes to do side by side comparisons for the Z12 and S18-55, especially for corner sharpness. I'm really hoping my Irish luck holds out and I get the same results out of the Z12 and S18-55 in the N4.33; I definitely don't won't to add the N7 to my compact travel rig. Wish I had a Z16-70 to compare with the other lens.
I also wondered how the longer Sony zooms would work, as I know a diver who uses a similar AOV zoom in a Nikon set-up with a diopter and he likes it as a versatile single dive set-up for WA and SM. While the 18-105 is an internal focus, it's a power zoom, so no way real way to use it and it's width would require a 2 part port set-up. Like you said, the MFD really doesn't work and there's no zoom gears or means to activate such.
Photos released this week by a guy on the web shows the S90FE, side-by side to the C100L, both being almost exactly the same size. This has increased the odds it might fit in my 2 part Nauticam Canon60 macro port with a 30mm extension. It's even possible the focus gear will work. Keeping my fingers crossed.
Too bad the Z16-70 zoom gear is wider than the mini-port extension ID, as 50mm of extension (which I'll have) is the correct length to put the Z16-70 into my N4.33. Even if I did get a gear to fit, I have no idea whether this would even work with the dome optics, since the Z16-70 has a pretty long reach. Sure would be nice to try it though. The S16 works fine with the 4.33, so I'm hoping the Z12 and S18-55 will work better than expected.
I'll be posting some 100% blow-ups of the Z12 and S-18-55 in both domes for comparisons shortly.