SIGMA 24-60mm F2.8 EX DG zoom lens. I used it with a Nikon D700. It's an F2.8 lens starting at 24mm. It was stored in a dehumidified box, but since it's old, please refrain from purchasing if you are concerned about its condition. The autofocus is the type driven by the camera, the same specification as Nikon's D-type lenses. Box and case included. Please feel free to ask any questions. - Brand: SIGMA - Model Name: 24-60mm F2.8 EX DG - Maximum Aperture: F2.8 - Focal Length: 24-60mm - Filter Diameter: 77mm - Features: Zoom lens Thank you for viewing. Open F-value...2.1〜2.8 Focal length (wide side)...19〜70mm Focal length (telephoto side)...51〜70mm Other features...Lens hood included, front lens cap included, rear lens cap included