I purchased this lens used around 2017 and have been using it since. I am selling it because I am switching to the RF mount. There is some minor dust inside the lens, but I believe it has little to no effect on the image quality. I have stored it in a dehumidified storage box, and there is no visible mold or fogging, at least to my untrained eye. I have also used it with a protective filter until I decided to sell it. There are no noticeable scratches on the front element. 24-105mm zoom lens Image stabilization function - Model: EF 24-105mm f/4L IS USM - Zoom range: 24-105mm - Maximum aperture: f/4 - Image stabilization: Yes - Hood: EW-83H Thank you for looking. Focal length (wide side)···19-70mm Focal length (telephoto side)···101-200mm Open F value···2.9-4 Other features···Lens hood included, front lens cap included, rear lens cap included