US 3,038,380 — Eismann / Lange
| 7 elements / 4 groups |
| f = 35 mm |
| F/4 |
| 2ω = 64° |
| all spherical |
Unit focus; close-focus back focus inferred from the Contarex 15 in film-plane specification.
| Element | Type | Glass |
|---|---|---|
| LI | Biconvex Positive | N-SK16 / SK16 (Schott) |
| LII | Biconcave Negative | K10 (Schott) |
| LIII | Positive Meniscus | SF4 (Schott) |
| LIV | Positive Meniscus | N-LAK7 / LAK7 (Schott) |
| LV | Biconcave Negative | BAFD8 / S-BAH28 class (723/380; patent vendor not named) |
| LVI | Biconvex Positive | BAFN11 / BAF11 / S-BAH11 class (667/484; patent vendor not named) |
| LVII | Positive Meniscus | N-LAK9 / LAK9 (Schott) |
Detailed analysis available in the interactive viewer above.