DE 975 637 C — Günter Klemt
| 6 ELEMENTS / 4 GROUPS |
| f = 90.3 mm |
| F/8 |
| 92° FULL APERTURE / 100° AT f/22 |
| 187.0 / 215.2 mm IMAGE CIRCLES |
| ALL-SPHERICAL |
Unit focus by camera bellows; the 1.0 m endpoint is a visualization convention, not a manufacturer-stated minimum.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FK3-class (465/657; probable historical Schott FK3, vendor unspecified) |
| L2 | Negative Meniscus | SF1 (Schott) |
| L3 | Positive Meniscus | FEL3 (HOYA catalog-equivalent; production supplier unspecified) |
| L4 | Plano-Convex Positive | BAF3-class (583/465; Schott N-BAF3 / Hikari J-BAF3 equivalent) |
| L5 | Negative Meniscus | SF1 (Schott) |
| L6 | Negative Meniscus | FK3-class (465/657; probable historical Schott FK3, vendor unspecified) |