US 3,318,653 — Karl H. Macher
| 6 ELEMENTS / 6 GROUPS |
| 35mm NOMINAL / 36.6mm EFFECTIVE |
| f/2.8–22 |
| 62.5° DIAGONAL |
| MFD 0.30m |
The production lens focuses from infinity to 0.30 m. The patent supplies only the infinity prescription, so focus travel is not modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FK3 — 464658 coordinate; compatible spectral proxy (supplier unconfirmed) |
| L2 | Biconvex Positive | BASF7 — 702411 coordinate; compatible spectral proxy (supplier unconfirmed) |
| L3 | Positive Meniscus | K-SSK1 — 617540 coordinate; compatible spectral proxy (supplier unconfirmed) |
| L4 | Biconcave Negative | SF56A — 785261 coordinate; compatible spectral proxy (supplier unconfirmed) |
| L5 | Biconvex Positive | BAFN6 — coordinate-compatible spectral proxy (supplier unconfirmed) |
| L6 | Positive Meniscus | LAC10 — 720503 coordinate; compatible spectral proxy (supplier unconfirmed) |