Contax 100-300mm F4.5-5.6 MMJ Contax, Serviced Yashica Contax This is a lens for the C/Y mount. Serviced by a camera repair specialist. The optics have been cleaned, so they are very clean. There are no defects that would affect photography. The lens functions properly in all aspects. You can take beautiful photos with it. You can use it with confidence. The items shown in the photos are the products. Thank you.