JP 2018-132674 A, Numerical Data 1 — Akira Mizuma
| 11 elements / 7 groups |
| f = 133.00 mm patent design (135 mm marketed) |
| F/4.05 design (f/4 marketed) |
| Patent image circle: 67.3 mm diameter |
| All-spherical; 2 UD/ED elements |
| Double floating focus; ±10° tilt, ±12 mm shift |
Published gap endpoints: L2/FN moves imageward and L3/FP objectward; source prose keeps L1/STO/RF fixed, with a retained 0.02 mm table-track discrepancy. Distance 0.486 m is product metadata and intermediate gaps are interpolated. Source paragraph 0048 prefers a focus-varying iris and near Figure 2(B) states Fno 5.60, but supplies no physical diameter schedule; current fixed derived iris is retained as a model limitation.
| Element | Type | Glass |
|---|---|---|
| G1 | Biconvex Positive | N-SSK5 (Schott; S-BSM25 class equivalent) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G2 | Biconvex Positive (UD) | S-FPL51 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G3 | Biconcave Negative | TAFD35L (HOYA equivalent; supplier uncertain) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G4 | Negative Meniscus | S-LAH55V (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G5 | Biconcave Negative | S-NBH5 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G6 | Positive Meniscus | S-LAH99 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G7 | Biconvex Positive | S-LAL14 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G8 | Biconvex Positive (UD) | S-FPL51 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G9 | Negative Meniscus | S-NBH56 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G10 | Positive Meniscus | S-LAH98 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |
| G11 | Biconcave Negative | S-LAL7 (OHARA) — compatible catalog spectral proxy; historical supplier/composition/melt unresolved |