Focus
Manual
Mount
Olympus OM
Format
35mm full frame
Weight
214g
Length mm
52
Spec Notes
2x matched teleconverter for the mid telephotos (100/2.8, 135/2.8, 135/3.5, 200/4, 200/5). A 6-element/6-group formula is claimed by one retail source only (unusual layout) -> not asserted. No earlier pre-A Olympus OM teleconverters exist (negative, medium confidence).
Diameter mm
63