Pentax's fast K-mount portrait prime — a manual-focus 85mm f/1.8 with Super Multi Coating.
The SMC Pentax 85mm f/1.8 is a fast short-telephoto prime for the Pentax K bayonet mount, from the first-generation K-series range. The 85mm f/1.8 is a classic portrait focal length and aperture, giving flattering perspective with a bright maximum aperture.
This is a manual-focus lens with an 85mm focal length and a maximum aperture of f/1.8, carrying Pentax's Super Multi Coating. Details such as element count and filter thread should be confirmed against the specific sample rather than assumed across Pentax's 85mm designs.
The 85mm short-telephoto perspective compresses features flatteringly for portraits, and the f/1.8 aperture produces a shallow depth of field with soft background rendering. It also works well for low-light general shooting where subject isolation is wanted.
Fast portrait primes are among the more sought-after vintage Pentax lenses and hold their value well, so expect a premium for clean glass. Check for haze, fungus and coating scratches, confirm the aperture blades are dry and quick, and test the focus ring for smooth, precise movement. It fits Pentax K digital bodies and adapts to mirrorless.