Pentax's faster M-series standard zoom — a manual-focus 35-70mm f/2.8-3.5.
The SMC Pentax-M 35-70mm f/2.8-3.5 is a standard zoom for the Pentax K bayonet mount, from the M-series generation built to be compact alongside Pentax's smaller bodies. It was one of the faster standard zooms in the M line, brighter than the later f/4 constant designs.
This is a manual-focus lens with a 35-70mm zoom range and a variable maximum aperture of f/2.8 at the wide end and f/3.5 at 70mm. It carries Super Multi Coating. Exact construction and filter thread should be confirmed on the specific sample rather than assumed.
The 35-70mm span runs from mild wide to short portrait length, and the relatively fast aperture at the wide end helps in lower light and for subject separation. It suits travel, street, portraits and general shooting from a single compact lens.
Faster M-series standard zooms are valued for their brightness and small size, making them pleasant adapting lenses. Check the zoom and focus for smooth movement and any play, inspect for haze, dust and fungus, and confirm dry aperture blades. It fits Pentax K digital bodies and adapts to mirrorless.