Focal Length...13-18mm Aperture...2.9-4 [Product Description] Good condition Sigma SIGMA 14mm F3.5 Nikon Nikon F mount. This lens is for Nikon F mount (FX format) cameras. It can also be used with DX format cameras (with a focal length of approximately 21mm). Also, please note that autofocus will not work with Nikon digital SLR cameras that do not have an AF coupler on the mount (entry-level models). Front and rear lens caps (Nikon cap) [Appearance] There are some scratches and minor marks, but there is almost no stickiness typical of Sigma lenses. Overall, it is in good condition with no other noticeable damage. Please check the images. [Operation] The helicoid and aperture blades operate smoothly. *Operation has been confirmed with "Nikon df". [Optics] There is some minor dust due to aging, but it is clear with no mold or clouding that would affect shooting. If there is anything you are concerned about that is not shown in the photos, please contact us and we will add more information. *Please refrain from purchasing if you are concerned about the condition in detail with a strong light source such as an LED. Due to the characteristics of the lens, flare will occur, so it is suitable for creating works of art. It is not suitable for architectural photography.