The lens's auto-focus is working. It functions without issue from infinity (♾️) to 1.7, but gets stuck when going to 1.5. Turning the focus ring by hand will return it to normal. I don't think there's any mold on the lens. There are no scratches on the tripod mount, and it appears to be an item that has hardly been used. ※ Please note that this is a used item, and I do not possess the specialized knowledge of a camera store. Therefore, there may be oversights. Please assume that anything not mentioned has not been checked. I cannot offer support or warranty for any changes in condition or malfunctions after receipt. Please only purchase if you understand and accept this. Returns are not accepted for used items.