Aetna 75/3.5
Appears to be an early version of the Japanese-made Coligar with f22 minimum aperture: AKA Perfex, Prinz, Soligor enlarger lenses.
| Dimensions | 75 mm |
|---|---|
| Focal Length (mm) | 75 |
| Max Aperture (f) | 3.5 |
| Min Aperture (f) | 22 |
| Elements | 3 |
| Rear Mount | M39 |
| Serial Numbers | 13506 |
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