The S3-2000 is a Nikon S-Mount camera, and will focus correctly with any of the lenses made for the 1950s Nikon RF cameras. These include Nikon, Tanar, and modern Cosina-Voigtlander "SC" S-Mount lenses. The Cosina wide-angle lenses are exceptional bargains compared with a vintage 28mm or 21mm lens. The 3.5cm F2.5 Nikkor wide-angle lens is a fine performer, and a good bargain. The 8.5cm f2 and 10.5cm F2.5 are exceptional performers, and not over-priced. The 5cm F2 and 5cm F1.4 are fine lenses. The 13.5cm F3.5 is a good performer, and can be found for under $100.
Zeiss lenses will fit on the S3-2000, but will not focus correctly with it. The DOF of Zeiss wide-angle lenses will cover the error.
FSU Kiev Mount lenses will work with some coaxing- filing down the mount. I use them on a "beater" S2. They will scratch up the Nikon Bezel if not filed down.
It is possible to adjust the Shim and Focal Length of the Zeiss lenses to work with a Nikon S-Mount cameras. The Nikon is made for a 51.6mm standard, the Contax is ~52.3mm. So you can move the rear elements in a little closer to the front elements and then shim the lens for the Nikon.
I enjoy "making" 50mm lenses for the Nikon camera. The internal helical means that once the lens is shimmed into the new mount, it is RF coupled without problems.