Zoom
Yes
Focus
Manual
Mount
Pentax K
Format
35mm full frame
Groups
10
Elements
10
Weight
315g
Filter Thread
52mm
Spec Notes
Early K-badge run (1975-1977), retagged SMC Pentax-M in Apr 1978. Focuses ~5cm closer / ~5g heavier than the M. 52mm.
Max Aperture
f/3.5
Min Focus Distance
55cm
Aperture Blades
6
Introduced
1975