Canon Power Zoom Adapter PZ-E1. By attaching it to the EF-S18-135mm F3.5-5.6 IS USM, smooth power zoom, which is difficult to achieve manually, becomes possible. The power zoom speed can be switched between two levels, and adjustment via the zoom lever is also possible. Works perfectly. I think it's clean with no noticeable scratches. The contacts are also clean with no liquid leakage. Comes with a dedicated case. Powered by four AAA batteries (batteries not included). Please purchase with the understanding that this is a used item.