High-performance single-focus lens with a focal length of 180mm and a maximum aperture of f/4.5. Mamiya Sekor C - Focal Length: 180mm - Maximum Aperture: f/4.5 Notes: This item was carefully used and cherished by my grandfather. It was also found during a decluttering of belongings. I do not know how to check the operation, so please make your judgment based on the photos. Please bid only if you understand. Please refrain from bidding if you are nervous about the condition. I am not an expert, so I cannot guarantee complete functionality. Please understand that this is considered junk. Please be aware of this beforehand. I have posted images that are as close to the actual item as possible. Thank you for viewing. Thank you for viewing.