Fast Pentax Takumar 135mm f/2.5 in K-mount, better portrait bokeh than f/3.5 alternatives at budget pricing.
The Pentax Takumar 135mm f/2.5 Bayonet is a manual-focus telephoto prime for Pentax K-mount cameras — a K-mount variant of the Takumar name, which was typically associated with M42 screw-mount. Pentax K mount.
135mm focal length. f/2.5 maximum aperture. Manual focus. 'Bayonet' suffix = K-mount bayonet. Pentax K mount.
The 'Bayonet' designation distinguishes this from M42-mount Takumar lenses — indicating the K bayonet mount version. The f/2.5 aperture is fairly fast for a 135mm prime. Compact manual focus telephoto prime for K-mount cameras.
On the used market the Takumar 135mm f/2.5 Bayonet is a vintage K-mount prime. Condition checks: aperture blades (f/2.5), manual focus ring, element condition. Pentax K mount.