31mm prime lens with an aperture of F1.8. Thank you for viewing. I purchased this lens used. It came with a lens cap, which it shouldn't have originally. Overall, it's in good condition, but it's an old lens, so there's some wear and tear. There's a slight scratch on the lens cap, not the body. Please check the images. There's some dust inside the lens. I don't see any mold, but I'm not an expert. Consider the box as a bonus.