| 5 ELEMENTS / 5 GROUPS |
| 30 mm MARKETED / 30.579845 mm DESIGN EFL |
| f/3.5 MODELED (STOP CALIBRATED) |
| ≈70° PATENT FIELD / 72° MARKETED USED FIELD |
| ALL-SPHERICAL |
Focus travel is not modeled. The patent supplies one nominal/infinity prescription only; 0.33 m is manufacturer metadata for the historical preselection-aperture variant and does not drive internal motion.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | H-ZK1 — compatible spectral proxy (historical supplier/melt unresolved) |
| L2 | Biconvex Positive | E-FD7 — compatible spectral proxy (historical supplier/melt unresolved) |
| L3 | Positive Meniscus | SK5 — compatible spectral proxy (historical supplier/melt unresolved) |
| L4 | Biconcave Negative | S-TIH14 — compatible spectral proxy (historical supplier/melt unresolved) |
| L5 | Biconvex Positive | N-SK16 — compatible spectral proxy (historical supplier/melt unresolved) |