Pentax K 35/3.5 lens (K): Retrofocus wide-angle Tessar

The Pentax K 35/3.5 lens (1975-1977):

(Pentax K 35/3.5)

This is the direct K-mount successor of the 35/3.5 M42x1 Takumar series (Auto/Super/S-M-C versions, 1959-1975).

(Takumars 35/3.5)

Meanwhile, the 35/3.5 Takumars came as an evolution of the Takumar 35/4 (1957-1959).

(Takumar 35/4, source)

All these lenses have 5 elements in 4 groups. And they are retrofocus versions of the Tessar optical design: a diverging meniscus was placed in front of a Tessar base lens. It defines a character of the lens.

See also related notes:

• External optical viewfinder (35mm): Accuracy (2024-10-11)
• Pentax K 35/3.5: Samples [2] - APS-C - f/3.5 (2024-08-25)
• Pentax K 35/3.5: Samples [1] - FF - f/3.5 (2024-06-01)

Image albums:

• Pentax K 35/3.5