M42 Mount Old Single-Focus Lens This is a well-known, famous lens. This particular one has a particularly beautiful appearance. ■ Operation Check Aperture operation Helicoid operation Manual/Auto switch I have confirmed the above. All functions operate without any problems. ■ Optics I do not list items with extreme mold, but please check the photos carefully before considering a purchase. ■ Accessories The items included are all shown in the photos. Returns or exchanges due to incorrect mount type are not accepted.