This lens is for the old Contax RF mount (inner bayonet). Please note that it is not for the Yashica Contax mount. As this lens does not have a focus ring, it can be used with a mirrorless camera via a helicoid adapter, or directly on a rangefinder camera. The body has a silver sheen and is in relatively good condition for an old lens. There is no mold or haze visible in the lens. This lens has been disassembled and cleaned, and dust has been removed as much as possible. However, due to the structure, dust is prone to enter, and slight dust particles may be present. This is minor and does not affect the image quality. Because there are very few of the light cleaning marks and coating scratches typical of Jupiter lenses, we have categorized it as a beautiful item. The aperture ring moves normally. No returns or exchanges accepted. Beautiful item, disassembled and cleaned, Jupiter-8M 50mm f2, old Contax RF mount (inner bayonet), Contax Ikon, Contax RF