Focus
Manual
Mount
Pentax K
Format
35mm full frame
Groups
4
Elements
6
Weight
8000g
Filter Thread
52mm
Spec Notes
Catadioptric (mirror), FIXED f/13.5, no diaphragm. 52mm rear drop-in + built-in filters. Produced ~1978-1982.
Max Aperture
f/13.5
Catadioptric
Yes
Min Focus Distance
2000cm
Introduced
1978