DE 1 282 311 — Hubert Ulbrich
| 5 ELEMENTS / 4 GROUPS |
| 135mm f/2.8 |
| 24×36 mm |
| 18° marketed field |
| ALL-SPHERICAL |
Production MFD is 1.50 m; the patent publishes only one design state, so no internal focus movement is reconstructed.
| Element | Type | Glass |
|---|---|---|
| L1 | Plano-Convex Positive | BACD6 spectral proxy (patent 614563 coordinate; supplier unconfirmed) |
| L2 | Biconvex Positive | BAF5 spectral proxy (patent 607492 coordinate; supplier unconfirmed) |
| L3 | Biconcave Negative | 699301 class (supplier unconfirmed) |
| L4 | Biconcave Negative | 639555 class (supplier unconfirmed) |
| L5 | Biconvex Positive | 699301 class (supplier unconfirmed) |