Since we don't know what camera or housing or exact lenses the answer is unknown. My bet, is I could get some of them to work with my S90/FIX90 but that is just a hunch. For that housing I would probably start with the FIX single piece 52mm port ring, not the 67mm three piece kit.
I would take a 47mm to 52mm step up ring and cut the threaded section (52mm threads) off so that the now modified adapter and 47mm threads sat down completely flush inside the FIX 52mm port adapter. I would now test fit my lens and notice if there is port contact, any shimming or centering needed. I would fab the required shims from aluminum stock if needed and then I would epoxy the whole thing together with something like EA9309 high strength structural epoxy. I would now have a zero stack Nemrod adapter. YRMV, my bet, I could make them work.
This is the concept, a macro lens, originally 47mm but set down into in this case a 67mm filter ring:
Many things are possible, the question is will the resulting IQ and efforts and time be worth it? Sometimes yes and sometimes no. I love a challenge, especially when somebody tells me I cannot use the Inon UFL165AD with blah, blah, twice now I have fabricated a method to use my fav lens with excellent results despite being told that it would not work, that it cannot work or that the IQ would be poor etc and etc. Yeah, uh, huh, whatever.
Oh, the little macro lens there, yep, it works nicely but here is the thing, macro bores the c---p out of me, sorry. I got some pics with it of some stupid snails and beats me sorta critters I cannot see with my naked eye, yawn. Wake me up when it is over please.
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