US 2,983,193 Fig. 2 — Willy Schade / Eastman Kodak
| 6 ELEMENTS / 4 GROUPS |
| f = 152.58 mm |
| F/3.5 |
| 2ω ≈ 29.4° |
| ALL-SPHERICAL |
No internal focus mechanism; unit-focus back-focus extension shown to 10 m for visualization.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | Unmatched (Kodak proprietary high-index lanthanum flint, 740/458) |
| L2 | Positive Meniscus | Unmatched (Kodak proprietary high-index crown, 693/562) |
| L3 | Negative Meniscus | Unmatched (Kodak proprietary dense flint, 683/309) |
| L4 | Negative Meniscus | Unmatched (Kodak proprietary dense flint, 667/322) |
| L5 | Positive Meniscus | Unmatched (Kodak proprietary lanthanum flint, 740/439) |
| L6 | Positive Meniscus | Unmatched (Kodak proprietary high-index lanthanum flint, 740/464) |
Detailed analysis available in the interactive viewer above.