Contax 35mm SLR Carl Zeiss Planar AE 85mm f/1.4 manual focus telephoto lens. Serial # 5805421. Made in Germany. Fits all Contax 35mm SLR cameras such as: Contax RTS, RTS II, RTS III, 167MT, Aria, ST, RT and Contax AX. Could also be used on Canon EOS Digital cameras like: Canon EOS-1Ds, Canon-5D, Canon-5D Mark II with proper adapter. Can also be used on most other brand mirrorless digital camera like the Canon R. Nikon Z, Sony a7IV with the proper adapter.  Lens has 67mm filter diameter. Focusing from 3.5 foot or 1 meter. Aperture from f/1.4 to f/16. Lens is Ex++/Mint- or 9/9.5 of 10 cosmetic condition. No dings or dents. Clean glass. Smooth focusing. Perfect working aperture. Blades are clean and smooth. Lens comes with original caps, Contax soft leather case, and B+W 67mm red & green filters. German made lens in great condition for your Contax system that can be used on other mirrorless digital cameras with proper adapters. Sells with NO RESERVE at price of $625. I have more Contax / Zeiss lenses, Large Format cameras, Lenses and Accessories, Medium format cameras, Subminiature and Soft Focus Lenses. More great buys on my other auctions, Ebay Store and web page.