Lens extension and retraction. Opening and closing of the internal blades. The above functions have been confirmed. There is some paint peeling, but overall, there is no shine from heavy use, and it appears to be an item with little use. I don't think there is any mold on the lens. ※ Please note that this is a used item, and I do not have the specialized knowledge of a camera store, so there may be oversights. Please assume that anything not mentioned has not been confirmed. We cannot provide support or warranty for any changes in condition or malfunctions after receipt. Please only purchase if you can accept this. As this is a used item, returns are not accepted.