Leitz Summaron 3.5cm f3.5 lens for Leica M mount, in very good condition, just back from a full professional CLA. Clean glass with only minor dust and good rangefinder calibration. Focusing action is a tiny bit tight at the close-up end, but only a tiny bit- and there's no effect on imaging. Diaphragm moves well, though the control ring has only very soft detents. Is this a perfect lens? It is not. But it will take a pretty nice picture.