Focus
Manual
Mount
Pentax K
Format
35mm full frame
Groups
4
Elements
6
Weight
2300g
Filter Thread
52mm
Spec Notes
Catadioptric (mirror) lens - FIXED f/11, no diaphragm (aperture Blades absent). Built-in filter wheel (ND/skylight/Y/R). Produced 1977-2004.
Max Aperture
f/11
Catadioptric
Yes
Min Focus Distance
800cm
Introduced
1977