This lens is for the old Contax RF mount (inner claw). Please note that it is not for the Yashica Contax mount. Since this lens does not have a focusing ring, you can use it with a mirrorless camera via a helicoid adapter, or directly on a rangefinder camera. The body has a silver luster and is in good condition for an old lens. There is no mold or haze inside the lens. This lens has been disassembled and cleaned, and dust has been removed as much as possible, but due to the structure, dust is likely to enter, and there may be some minor dust particles. This is minor and does not affect the image quality. There are a few more light wiping marks and coating scratches typical of Jupiter lenses. They are not deep enough to affect the image quality. The aperture ring moves normally. No returns or exchanges accepted. Good condition, disassembled and cleaned Jupiter-8M 50mm f2 Old Contax RF mount (inner claw) Contax Ikon Contax RF One