I was using this lens with a mirrorless camera. There is some minor dust inside the lens. I will carefully package the item and ship it promptly. The NIKKOR-S 55mm f/1.2 lens allows for high-quality photography with a bright maximum aperture. - Model Name: NIKKOR-S 55mm f/1.2 - Country of Manufacture: Japan - Focal Length: 55mm - Maximum Aperture: f/1.2 - Aperture Blades: 6 - Filter Diameter: 52mm Thank you for looking.