This is a Nikon NIKKOR Z 40mm f/2 lens. Comes with the original box. It's a compact and convenient lens, but I've been using the NOKTON classic 40mm f/1.4 and Z 50mm f/1.8 more often, so I'm selling this one. The mount is listed as F-mount because there wasn't a Z-mount option. It is a Z-mount lens. It functions perfectly, and the lens has no mold or haze. There might be some minor dust particles, although they are not visible. The front element is clean because I always used a filter. The mount has some minor scratches as it's a plastic mount, but it's within the normal range. Please check the photos. Thank you. - Brand: NIKKOR - Model Name: Z 40mm f/2 - Filter Diameter: 52mm - Lens Type: Prime/Single Focal Length - Included Accessories: Original Box Thank you for looking. Focal Length: 19-70mm Maximum Aperture: f/1.5-2 Other Features: Includes front and rear lens caps