I have various macro lenses and recently I purchased the Panasonic 30mm lens to get more FOV flexibility (the 60mm is sometimes to extreme at almost 150mm behind a flat port.
I also have the inon H100 set-up for wide angle on a compact.
I do not have the dome for the Inon H100 but I calculated that if I buy it and attach to the 30mm macro set-up (Nauticam 45) I would get the equivalent FOV of about 95°. Basically equivalent to a 10mm M43 lens which has a nicely usable FOV if quality is good.
And if I detach the Inon I get to use the set up as macro lens...
Any thoughts as to how this would work? The INON is designed for the 14mm (focal in M43) but it should work well at 30mm.