This is a large-aperture prime lens with an 80mm focal length and a maximum aperture of f/1.9. - Lens focal length: 80mm - Maximum aperture: f/1.9 - Filter diameter: 67mm - Lens type: Prime lens For Mamiya medium format camera 645. - Accessories Lens caps: Front cap, rear cap, Clip-on rubber hood, Kenko UV filter - Country of manufacture: Made in Japan - Although it is a Mamiya 645 mount, it is listed as an X mount because there is no corresponding size in the category size field. The exterior has slight scuffs, but overall it is a beautiful item with few scratches and stains, and little signs of use. The operation is smooth. Due to long-term home storage, the lens has spiderweb-like mold (photo 4) and some spot mold. There is also spot mold on the UV filter. Please take a good look at the images and confirm. Thank you for viewing. Focal length...71-150mm Open F value...1.5-2