DE 3602859 A1 — Utz Schneider, Volker Tautz, Karin Holota
| 9 ELEMENTS / 8 GROUPS |
| f ≈ 35.0-65.2 mm (DESIGN) |
| F/2.7-3.67 (DESIGN) |
| 2ω ≈ 63.4°-35.1° |
| NO ASPHERICAL SURFACES |
RECONSTRUCTED, not published: rigid unit extension of the whole powered system against the plane plate that claim 2 fixes to the camera, so only l7 changes (+1.78 mm at 35 mm rising to +6.58 mm at 65 mm for the secondary-sourced 0.80 m object-to-image minimum, solved at each of the ten zoom stations). Eight of those stations are code-solved fixed-image-plane states, not published. The separate 1:3 macro mode at the long end is not modelled.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAL12 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| L2 | Negative Meniscus | LAC13 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| L3 | Positive Meniscus | SF2 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| L4 | Biconvex Positive | N-SK14 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| L5 | Negative Meniscus | E-FD4 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| L6 | Positive Meniscus | Unmatched (Jena melt, n_e 1.66640 / ν_e 56.14; no verified compatible catalog dispersion) |
| L7 | Biconcave Negative | J-BASF2 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| L8 | Biconvex Positive | N-SSK5 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |
| P | Plane-Parallel Plate | N-BK7 — compatible native e-line spectral proxy; historical Jena supplier and melt unconfirmed |