US 4,773,745 — Hiltrud Ebbesmeier née Schitthof
| 8 ELEMENTS / 6 GROUPS |
| f = 121.6 mm (SCALED PATENT MODEL) |
| f/5.6 |
| 82° AT f/22 / 211 mm IMAGE CIRCLE |
| ALL-SPHERICAL |
Unit focus by moving the complete shutter-mounted lens with the view-camera bellows; 1.0 m is a modeled UI endpoint, not a fixed manufacturer MFD.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus, convex to object | FK3 class (SCHOTT inquiry; exact nd/νd optical-position match) |
| L2a | Positive Meniscus, convex to object | N-LAK33B class (SCHOTT; exact nd/νd optical-position match) |
| L2b | Negative Meniscus, convex to object | 625/356 flint (CDGM H-F6 optical equivalent; historical supplier unverified) |
| L3 | Positive Meniscus, convex to object | N-LAF34 class (SCHOTT; rounded optical-position match) |
| L4a | Biconvex Positive | N-SK16 class (SCHOTT; rounded optical-position match) |
| L4b | Negative Meniscus, concave to object | 667/331 dense flint (CDGM H-ZF39 closest public match; vendor unspecified) |
| L5 | Positive Meniscus, concave to object | N-SK16 class (SCHOTT; rounded optical-position match) |
| L6 | Biconcave Negative | Unmatched (479/587 low-index crown; vendor unspecified) |