Kodak Micro-File Ektar 63/8
Heliar design microfilm lens. Reported to be high-resolution. Features a helicoid but a fixed aperture at around F8 – but not marked.
| Dimensions | 63 mm |
|---|---|
| Focal Length (mm) | 63 |
| Max Aperture (f) | 8 |
| Min Aperture (f) | 8 |
| Aperture Type | Fixed |
| Elements | 5 / 3 |
| Front Thread | None |
| Production | 1940-1960s |
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