Takumar 83mm f/1.9

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 3.5ft; the metric minimum is a rounded conversion.