CH 314381 — Günther Lange, Robert Richter
| 4 ELEMENTS / 3 GROUPS |
| f ≈ 50.0 mm |
| F/3.5 |
| 2ω ≈ 48° |
| ALL SPHERICAL |
Unit focusing — entire optical assembly translates axially as a rigid body.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | N-SK16 (Schott) |
| L2 | Biconcave Negative | E-F8 (HOYA catalog-equivalent to historical Schott F8; patent supplier unspecified) |
| L3 | Negative Meniscus | LF5 (Schott) |
| L4 | Biconvex Positive | N-BAF10 (Schott) |