This SIGMA zoom lens has a focal length of 75-200mm and features a bright f/3.8 aperture. Please be aware that there may be some mold or other imperfections, and purchase with your understanding and acceptance. - Brand: SIGMA - Model: 75-200mm f/3.8 - Focal Length: 75-200mm - Aperture: f/3.8 - Lens Diameter: Approximately 62mm Normal cleaning may be required. Thank you for looking.