This is not an F-mount lens. ・Mount: Contax/Yashica A high-quality 85mm f/1.4 prime lens. This is a CONTAX Carl Zeiss Planar T* 50mm F1.4 (Y/C mount) lens. It's a standard lens with a focal length of 50mm and a wide open aperture of F1.4. It's also known as the "Emperor of Standard Lenses," and its appeal lies in its ability to produce images that are both sharp and soft. The minimum focusing distance is 0.45m. There is some slight clouding on the outer edge of the front lens, but there is little dust, and I was able to take beautiful pictures without any problems with the shooting. Please check the images. C/Y CONTAX YASHICA - Lens Model: Planar 1.4/85 - Country of Manufacture: Japan - Maximum Aperture: f/1.4 - Focal Length: 85mm - Lens Condition: Good If you are concerned about fine dust inside the lens, please refrain from purchasing. There are some minor scratches due to use, but it is generally clean. As I am not very knowledgeable about cameras, I would appreciate it if you could judge from the photos. If you would like additional photos, please feel free to comment. [Other] Although we have inspected and photographed the item, there may be oversights. Please check the photos and purchase with your understanding. The item includes what is shown in the images. Returns are not accepted to prevent swapping. Please understand that this is a used item, so please refrain from purchasing if you are looking for perfection or are very sensitive. Thank you for viewing. I