Same as the S2 except: this is a nitrate treated S2 body causing the finish to take on a beautiful black coloring. Also: S2b has a center weighted average metering system rather than the spot metering system in the S2. Back to Basics camera with all manual settings and mechanical shutter. Titanium top, bottom and front panels. Also with rubberized "O" rings and special gaskets for use in adverse weather. Manual exposure settings, TTL center weighted averaging metering, LED meter display, dedicated hot shoe, PC sync terminal. Shutter speed range 1 sec to 1/4000 plus B, X flash sync at 1/250. ISO range 12-6400, set manually. Manual film advance and rewind. Self timer, multiple exposure capability, interchangable focusing screens (FU series), mechanical cable release socket. Battery check visible in viewfinder. Will work perfectly at all shutter speeds without battery if the light meter is not required. Case: C-3.