Thank you for viewing. This is a SIGMA APO 50-500mm F4-6.3 EX DG HSM lens (for Four Thirds mount). Operation has been confirmed, and both the zoom and focus mechanisms are working without any problems. While there may be some minor scratches, it's a beautiful item that doesn't feel heavily used. The optics are clear, and there is no noticeable mold, clouding, or dust. The mount is Four Thirds. An adapter is required for use with other mount cameras. Please check the photos for the condition. I'm not very knowledgeable, so please ask any questions in the comments. Box: A