Takumar 100mm f/3.5

Notes and sources

Documented from the original Asahiflex Model II manufacturer manual, Takumar interchangeable-lens section. These are the M37 configurations, not later M42 lenses. The manual gives element counts without group counts; missing filter sizes, dimensions and exact production dates have not been inferred. Maker distance scale starts at 4.5ft; the displayed metric minimum is a rounded conversion, not a new measurement.