SIGMA Ultra-Wide Zoom Lens 10-20mm F3.5 EX DC HSM for Canon APS-C Only I no longer use this and have stored it for a long time. It was stored in a dehumidifying box and kept out of direct sunlight. Currently, the power to the main unit does not turn on, so I have not been able to confirm its operation. It was working without any problems before storage. Since this is a used item, I would appreciate it if you could understand this.