Zoom
Yes
Focus
Manual
Mount
Pentax K
Format
35mm full frame
Groups
7
Elements
12
Weight
730g
Filter Thread
40mm
Spec Notes
Rare catadioptric (mirror) ZOOM. FIXED aperture varying f/8-12 across the zoom range (no diaphragm; aperture Blades absent). 40.5mm rear + 67mm front. Produced 1984-1999.
Max Aperture
f/8
Catadioptric
Yes
Min Focus Distance
300cm
Introduced
1984