Pentax's fast A-series wide prime — a manual-focus 28mm f/2 with an 'A' aperture setting.
The SMC Pentax-A 28mm f/2 is a fast wide-angle prime for the Pentax K bayonet mount, from the A-series generation with the 'A' aperture position for exposure automation. At f/2 it was one of the brighter 28mm options Pentax offered on the K mount.
This is a manual-focus lens with a 28mm focal length and a maximum aperture of f/2, carrying Super Multi Coating and an 'A' setting for camera-controlled aperture. Element count and filter thread should be confirmed against the specific sample rather than assumed.
The combination of a 28mm wide field and an f/2 aperture makes this useful for low-light street work, interiors and available-light reportage where a faster lens matters. The extra speed also allows some background separation unusual at this focal length.
Faster A-series wide primes are among the more desirable vintage Pentax lenses and hold their value accordingly. Look for haze, fungus and coating wear, confirm the aperture is dry and the 'A' position locks, and test ring damping. It fits Pentax K digital bodies and adapts to mirrorless with an adapter.