This Carl Zeiss Jena Duonar 2x T Bay III Lens for Rolleiflex Nr.3545109 is a high-quality teleconverter that is compatible with Rolleiflex cameras. Made in Germany, this lens has a manual focus type and a maximum aperture. It is designed for use with both Bay-1 and Bay-III series and has a focal length of 2x.

The lens is in great working condition and is a perfect addition for any Rolleiflex enthusiast. Its sturdy mount ensures a secure fit into your camera and its brand, Carl Zeiss Jena, is a reliable one. Get ready to capture stunning shots with this lens that is perfect for any photography enthusiast.