I'm started down a slightly different path (albeit very slowly) in my photography, so picked up one of these as well as the f/4 150mm Zeiss Sonnar. Both lenses have Synchro-Compur shutters, so flash synch speed is up to 1/500th sec. This also means that the flash synch cable attaches to the camera lens, not the body. Built from 1970 - 1994; this one seems to have been built in 1972. It was recently cleaned and serviced and has less than 50 shots taken on it post-service.