The A. Schacht Ulm Travenar R 135mm f/3.5 is a lens from the manufacturer Albert Schacht. At the time of the lens's construction, Germany was divided into two parts. Ulm is located in Baden-Württemberg and was therefore part of the Federal Republic of Germany.
The focal length of this prime lens is 135 mm. It belongs to the group of telephoto lenses. The maximum aperture of this lens is f/3.5. The minimum aperture is f/32.
Focus adjustment on this model is not automatic. It is set manually. The manufacturer specifies a minimum focusing distance of 150 cm. A 49 mm filter, e.g., an IR filter, can be screwed onto the front of the lens.
For photography, you need an analog camera with an M42 thread. The M42 thread was very common at the time of construction. Even today, good M42 cameras are still easy to find. With an adapter, this telephoto lens can also be used on digital cameras. These adapters are available for most cameras with interchangeable lenses, including Sony, Fujifilm, Olympus, Canon, and Nikon.
