The Nikonos RS was Nikon's underwater autofocus SLR using interchangeable bayonet lenses designed for amphibious use. A prototype example refers to a pre-production unit predating the standard catalogued release.

Pricing reference for the prototype is extremely thin: a single UK saleroom result from 2013 fetched £1,200 at hammer (wholesale, excluding commission), and no further auction sales are on file to establish a current range or median in 2026. With only one data point, what a Nikonos RS prototype is worth today, or sells for, cannot be reliably stated without fresh comparable results.