This is an Olympus old lens, the OM-SYSTEM OM ZUIKO MC AUTO-S 50mm F1.4. It's a lens for the OM mount from the film era. ◯ The operation of functions such as the focusing ring and aperture has been confirmed. ◯ Regarding the exterior, there are dirt and scratches. ▲ Regarding the optics, there is mold. Please purchase with the assumption that it needs to be removed. Therefore, it is listed at a lower price than the market average. ☆ Although the focusing ring and aperture operation have been confirmed, it is listed as a junk item. Please purchase with the understanding that you will receive a lens-shaped object.