On the note of Velvia 100 - curious - for any medium speed film, slide or otherwise, under the water, one would surely need strobes?
I'm trying to find a Nikonos V for some fun and local freshwater dives, though I thought about taking it to blue water trips too. I normally use a GoPro but have gotten heavily back into film photography above water (I shoot from 35mm all the way up to 4x5 now) and having a means to take some still on silver, maybe in addition to my GoPro, would be really cool.
I looked for Nikonos V's about a year ago that already had been serviced for use underwater (some with warranties even) but alas trying to find them now have been more difficult :/ Curious if anyone has any suggestions there?