US 3,376,091 — Werner Wagner, Karl Heinrich Macher
| 8 ELEMENTS / 4 GROUPS |
| f ≈ 75.1 mm |
| F/5.6 |
| 2ω ≈ 100° |
| ALL SPHERICAL |
Unit focus — entire lens moves via view camera bellows or focusing rail. No internal focus mechanism.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FK3 (Schott) |
| L2 | Negative Meniscus | LaF3 (Schott 717479) / S-LAM3 optical equivalent |
| L3 | Biconvex Positive | 614551 — SSK-class dense barium crown (Schott historical; Hikari SK9 optical equivalent) |
| L4 | Biconcave Negative | LLF4 (SUMITA catalog equivalent for patent coordinate; production supplier unspecified) |
| L5 | Biconcave Negative | BaK4 (Schott) / S-BAL14 optical equivalent |
| L6 | Biconvex Positive | BACD6 (HOYA catalog-equivalent; patent supplier unspecified) |
| L7 | Negative Meniscus | BaSF-class barium dense flint (Schott 702411; S-BAH27 / BAFD7 optical equivalent) |
| L8 | Negative Meniscus | BK7G18 optical match (Schott 520636; K/BK crown class) |