the olympus om system was further enlarged; its zuiko lenses gained a reputation as being among the sharpest lenses in the world, and in the 1980's, olympus added further improvements by replacing the om-1 and om-2 cameras with the om-3, a mechanical manual slr and the om-4 automatic, both of which featured multi-spot metering capabilities. these cameras were further improved into the last of the om slrs, the titanium-bodied om-3ti and om-4ti, introducing at the same time, the world's fastest electronic flash synchronization speeds, at 1/2000 second with their new full-synchro strobe-based flash technology.