The Carl Zeiss Jena DDR Electric MC 135mm f/3.5 M42 Mount Camera Lens is a high-quality telephoto lens designed for SLR cameras with M42 mount. Made in Germany, this lens features a maximum aperture of f/3.5 and a focal length of 135mm, ideal for capturing detailed images in portrait or nature photography. With manual focus and a fixed prime focal length, this lens offers excellent image quality and sharpness for film photography enthusiasts.