Overall, the condition is good, with only a very small amount of dust that does not affect the shooting. This is a prime lens for digital and film cameras with a 50mm focal length and a bright maximum aperture of f/1.1. - Brand: Mr.Ding - Model Name: Noxlux DG 50/1.1 E58 - Focal Length: 50mm - Maximum Aperture: f/1.1 - Filter Diameter: 58mm Thank you for viewing.