German Isco Gottingen 135mm F3.5 Tele-Westanar Lens Screw Mount M42 for Pentax, Canon, and pretty much any other brand of camera. This all-metal "zebra" lens is in excellent condition, both the body and the optics. No fungus, haze, scratches, or visible dust. It has 15 blades for an amazing bokeh. And it is probably one of the smallest 135mm lenses I have seen. The Isco Gottingen manufacturer was connected with the famous Schneider factory and made many lenses for the German military, especially aviation.
