US 3,771,853 A, Embodiment III — Soichi Nakamura
| 11 ELEMENTS / 7 GROUPS |
| 28.85-44.19 mm PATENT DESIGN |
| F/4.5 PATENT APERTURE ASSERTION |
| ALL-SPHERICAL |
Not modeled — the patent publishes no finite-object focus spacings; 0.6 m is production MFD metadata only and all authored focus pairs are identical.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | 520701 — J-PKH1 coordinate-compatible proxy (supplier unresolved) |
| L2 | Positive Meniscus | 804464 — N-LASF44 coordinate-compatible proxy (supplier unresolved) |
| L3 | Biconcave Negative | Unmatched 446672 — low-index crown (supplier unresolved) |
| L4 | Biconvex Positive | 611558 — H-ZK5/BACD8/SK8/BSM8 coordinate class; supplier unresolved |
| L5 | Negative Meniscus | Unmatched 841433 — high-index crown (supplier unresolved) |
| L6 | Positive Meniscus | 541472 — LLF2/QF8 coordinate class; supplier unresolved |
| L7 | Positive Meniscus | 697556 — K-LaK14/J-LAK14 coordinate class; supplier unresolved |
| L8 | Biconcave Negative | 805395 — NBFD3 coordinate-compatible proxy (supplier unresolved) |
| L9 | Negative Meniscus | 728283 — SF10/E-FD10/ZF4/H-ZF4A coordinate class; supplier unresolved |
| L10 | Biconvex Positive | Unmatched 841433 — high-index crown (supplier unresolved) |
| L11 | Positive Meniscus | 767466 — J-LASFH2 coordinate-compatible proxy (supplier unresolved) |