Focus
Manual
Mount
Olympus OM
Format
35mm full frame
Groups
6
Elements
7
Weight
310g
Filter Thread
55mm
Length mm
47
Spec Notes
Early ultra-fast normal (55mm filter), replaced by the 50mm f/1.2. At least two marking generations (fold); early units used thoriated (mildly radioactive) rare-earth glass. Distinct lens from the 50/1.2, not a version of it.
Diameter mm
65
Max Aperture
f/1.2
Min Focus Distance
45cm
Focal Length (Max)
55mm
Focal Length (Min)
55mm