Focus
Manual
Mount
Pentax K
Format
35mm full frame
Groups
5
Elements
7
Weight
1020g
Filter Thread
77mm
Spec Notes
7/5 non-ED (a different, earlier design from the M*/A* 300/4 ED, 8/7). 77mm. Produced 1975-1981.
Max Aperture
f/4
Min Focus Distance
400cm
Aperture Blades
8
Introduced
1975