This is a standard zoom lens made by Sigma. It takes very good pictures. Please note that it is an L-mount. I purchased it three years ago and have used it a few times a month. When not in use, it was stored in a dehumidified cabinet. There is no noticeable damage to the exterior or the lens. Operation is smooth. I am selling it because I am replacing my equipment. The original box, dedicated case, lens hood, and front and rear caps are included. As a bonus, I will also include a protective filter. I would be happy if you would consider it for practical use. Thank you.