200mm f/3.5 M42 screw telephoto with 62mm filter thread. Will fit modern cameras with an adaptor. I've been using it on an Olympus OM-D
very good optically and cosmetically. Aperture broken so it's wide open at f/3.5 all the time. Will suit someone who wants to shoot wide open for interesting bokeh, or mechanic who can stip down and fix..