Auto Takumar 35mm f2.3 / Sony A7R

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The Auto Takumar 35mm f/2.3 is a vintage manual focus lens that was produced by the Japanese camera manufacturer Asahi Pentax (now known as Pentax) from the late 1950s to the early 1960s. It was designed for use with the Pentax M42 screw mount cameras, such as the Pentax Spotmatic.
Here are some key features of the Auto Takumar 35mm f/2.3 lens:
Focal length: 35mm
Maximum aperture: f/2.3
Minimum aperture: f/22
Minimum focusing distance: 45cm
Lens construction: 6 elements in 5 groups
Angle of view: 63 degrees
Filter thread: 62mm
Weight: approximately 310g