The Pentax SMC Pentax-M 200mm f/4 manual telephoto lens is a classic manual telephoto prime lens launched by Pentax in 1977. Full name: SMC Pentax-M 200mm 1:4. It belongs to the Pentax M series of manual lenses and features SMC multi-coating. Mount: Pentax K mount (PK mount), compatible with Pentax film SLRs and most mirrorless cameras via adapters. Optical structure: 6 elements in 5 groups, 8 aperture blades, 52mm filter thread, weighing only about 400g, making it very lightweight for a telephoto lens of this size. Optical system: Utilizing SMC Pentax multi-coating technology, the 6 elements in 5 groups optical structure, combined with an 8-blade aperture, delivers rich and natural color reproduction and smooth bokeh. It also boasts excellent anti-flare and anti-ghosting capabilities, one of the hallmark advantages of Pentax lenses. Key Specifications: Focal length 200mm, constant maximum aperture f/4, 52mm filter diameter, lightweight (approx. 400g), includes a retractable lens hood, balancing portability and practicality, minimum focusing distance 2m, suitable for various shooting scenarios including landscapes, portraits, and more. Lens Condition: Front and rear lens elements are clean and clear, free of mold, fogging, and hard scratches. Only slight dust from normal use is present, which does not affect image quality. Coating Condition: Very slight peeling marks are present on the lens edges, a normal sign of aging for older lenses, and have no negative impact on image quality or color. Accessories and Appearance: Comes with original Pentax lens cap; lens body shows normal signs of use, overall in good condition.