DE 1 157 000 — Wolf Dannberg, Eberhard Dietzsch
| 7 ELEMENTS / 4 GROUPS |
| f ≈ 50.00 mm |
| F/4 |
| ALL-SPHERICAL |
| 6×6 FORMAT |
Infinity prescription only; the patent gives no focus travel. The production lens focuses to 0.50 m.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | N-LAK14 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L2 | Biconcave Negative | BAK2 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L3 | Biconvex Positive | 682419 class (supplier unresolved) |
| L4 | Positive Meniscus | 682419 class (supplier unresolved) |
| L5 | Biconcave Negative | SF5 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L6 | Positive Meniscus | BK4 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L7 | Biconvex Positive | 681472 class (supplier unresolved) |