It's probably a Nikon Ai-s NIKKOR 50mm f1.8. I'm not very familiar with Nikon lenses, so I apologize if I'm mistaken. The optics appear relatively clean, with some dust and debris. The reason for the junk status is that there is oil on the aperture blades, causing poor operation. Due to the above reasons, I would appreciate it if you would purchase it as-is, no returns or refunds. If you have any questions or requests for additional photos or detailed information, please comment. Nikkor 50mm f/1.8 lens, achieves excellent bokeh with a wide aperture. - Model: Nikkor 50mm f/1.8 - Aperture: f/1.8 - f/16 - Focal Length: 50mm - Lens Diameter: Approximately 52mm Thank you for viewing.