Pentax's K-mount mild-wide prime — a manual-focus 35mm f/3.5 with Super Multi Coating.
The SMC Pentax 35mm f/3.5 is a wide-angle prime for the Pentax K bayonet mount, part of the original K-series range introduced with the move from M42 screw mount to the K bayonet. The 35mm was a mild wide favoured for reportage and everyday shooting.
This is a manual-focus lens with a 35mm focal length and a maximum aperture of f/3.5, 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 the several 35mm designs Pentax made.
A 35mm gives a mild wide field close to natural perspective, working well for street, travel, documentary and general photography. The f/3.5 aperture keeps the lens compact and is well suited to daylight and stopped-down landscape work.
This is a common focal length, so used examples are plentiful and buyers can hold out for clean glass. Check for internal haze and fungus, confirm the aperture blades are dry and snappy, and test both rings for smooth action. It mounts on Pentax K digital cameras and adapts to mirrorless with an adapter.