Pentax Takumar 28mm in K-mount bayonet, Takumar optical quality in the more convenient K-mount system.
The Pentax Takumar 28mm f/2.8 K-Mount is a wide-angle prime for the Pentax K bayonet mount — using the Takumar lens name in the K-mount era (early K-mount production). Pentax K mount.
f/2.8 maximum aperture. 28mm focal length (full-frame wide angle). Takumar designation (K-mount production era). Manual focus. Pentax K mount.
The Pentax Takumar 28mm f/2.8 K-Mount is an early K-mount lens — Pentax used the Takumar designation on some early K-mount lenses before transitioning fully to the 'Pentax' name. Functionally equivalent to later Pentax SMC-K or SMC-M 28mm lenses.
On the used market the Pentax Takumar 28mm K-Mount is a practical vintage wide angle. Condition checks: front element, aperture blades, focus ring. Pentax K mount — manual focus.