This product was purchased new and used three times. The image quality is good, but I'm selling it because it overlaps with other lenses I own. It is a VM mount. The Voigtländer HELIAR Classic 50mm F1.5 is a prime lens with a bright F1.5 aperture. - Model Name: HELIAR Classic 50mm F1.5 - Lens Diameter: 50mm - Maximum Aperture: F1.5 - Brand Name: Voigtländer Please refrain from purchasing if you are overly concerned about condition, as this is a used item.