The SIGMA 100-400mm F5-6.3 DG DN OS is a high-performance zoom lens from the Contemporary series. For Sony E-mount - Brand: SIGMA - Model Name: 100-400mm F5-6.3 DG DN OS - Filter Diameter: 67mm - Type: Zoom lens - Features: Contemporary series I purchased this last year. I mainly used it for product photography. A protective filter was attached, so there are no problems with the lens. There are no noticeable scratches or any clouding that would interfere with shooting. Thank you for looking. Focal length (wide side)···71-150mm Focal length (telephoto side)···301-400mm Open F value···4.1-5.6 Other features···Lens hood included, front lens cap included, rear lens cap included