The Pentacon Auto MC 135 mm f/2.8 is a vintage medium-telephoto prime lens for M42 screw-mount cameras, produced in East Germany from the early 1970s through the late 1980s. Based on the Meyer-Optik Görlitz Orestor 135 mm design, it features a 5-element/4-group optical formula, multi-coating (MC) for improved contrast, and a 6-blade automatic diaphragm. With a fast f/2.8 aperture and a minimum focus distance of 1.5 m, it’s well-suited for portraits, nature, and compressed-perspective scenes. The lens has a built-in lens hood. The lens has signs of wear and usage. It is fully functional, with smooth focus. The glass is clean and scratch-free. and no fungus. There are signs of dust particles inside the lens, please take a look at the pictures. Comes with an additional 55mm UV filter. Pentacon auto 135mm f2.8 MC Serial number: 8230920 - M42 mount - 6 blade iris - f2.8 to f22