The Leitz Telyt 400mm f5.6 is a large, simple telephoto lens- just a couple of elements- here mounted to the Televitfocusing attachment. In very good condition overall, with minor internal dust, good focusing action. Works well! Not included but required for use: a Visoflex and a compatible Leica camera,or whatever combination of adapters you choose to use if you want to mount this on something else.