Purchased new and used for less than a year. I bought this lens to take astrophotographs and enjoyed using it, but I'm switching to a different camera manufacturer, so I'm selling it. From a layman's perspective, the lens appears to be free of scratches, dust, and fogging. There is some evidence of use, so please refer to the photos for condition. Focal length: 13mm F-number: 1.4-16 Focus: Autofocus compatible Mount: NIKON Z Sensor size: For APS-C