Lens extension and retraction. Opening and closing of internal blades. The above have been confirmed. Dust and mold are visible on the lens. ※ 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. We cannot provide support or warranty for any changes in condition or malfunctions after receipt. Please purchase only if you can accept this. As this is a used item, returns are not accepted.