Pentax's compact M-series portrait prime — a manual-focus 85mm f/2 with Super Multi Coating.
The SMC Pentax-M 85mm f/2 is a compact short-telephoto prime for the Pentax K bayonet mount, from the M-series generation built to be small and light alongside Pentax's downsized bodies. It offered a fast portrait focal length in a notably compact barrel.
This is a manual-focus lens with an 85mm focal length and a maximum aperture of f/2, carrying Pentax's Super Multi Coating. The M line prioritised compactness, so the lens is small for its speed; confirm the filter thread and other details on the specific sample.
The 85mm perspective flatters faces for portraits, and the f/2 aperture gives a shallow depth of field with smooth background separation. Its compact size makes it easy to carry for portraits and low-light general work.
Compact fast M-series portrait primes are popular for adapting because of their size and rendering, so clean examples hold their value. Check for haze, fungus and coating wear, confirm the aperture blades are dry, and test the focus ring for smooth, precise action. It fits Pentax K digital bodies and adapts to mirrorless.