Focus
Manual
Mount
Olympus OM
Format
35mm full frame
Groups
4
Coating
multi-coated
Elements
6
Weight
170g
Spec Notes
Bellows/tube-only high-magnification macro (4.2x-16x; 5.3x-13.6x on Auto Bellows); auto diaphragm; OM bayonet, no helicoid -> no min-focus figure. Single version. Start year c.1980 (source internally ambiguous, also says ~1985) -> year omitted.
Max Aperture
f/2
Aperture Blades
6
Focal Length (Max)
20mm
Focal Length (Min)
20mm