US 2019/0278068 A1, Numerical Example 5 — Takahiro Hatada
| 21 ELEMENTS / 15 GROUPS |
| f = 24.7–67.9 mm |
| F/2.91 |
| Infinity-focus model; centered IS |
| 2ω = 82.4°–35.4° |
| 5 ASPHERICAL SURFACES / 3 ELEMENTS |
Infinity-focus model: the patent describes rearward focus motion of L6 (E19) but publishes no finite-focus gaps. Focus is disabled; the 0.21 m label is retained retail metadata, not a modeled conjugate. IS is centered. Numerical zoom gaps take precedence over the contradictory all-groups-objectward narrative. Only D31 and D33 change for isolated L6 focus motion; BF belongs to zoom.
| Element | Type | Glass |
|---|---|---|
| G1n | Negative Meniscus | S-NPH1 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| G2p | Positive Meniscus | S-LAH66 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| G3p | Positive Meniscus | S-LAL18 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L4 | Negative Meniscus | S-LAH58 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L5 | Biconcave Negative | S-FPL51 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L6 | Positive Meniscus | S-NBH56 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L7 | Biconcave Negative | S-LAL18 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L8 | Biconvex Positive | S-FTM16 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L9 | Negative Meniscus | S-LAH55V — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L10 | Biconvex Positive | S-LAH96 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L11 | Biconvex Positive | S-FPL51 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L12 | Negative Meniscus | TAFD40 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L13 | Biconcave Negative (1× Asph) | S-BAL42 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L14 | Positive Meniscus | S-TIH14 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| Gfp | Biconvex Positive | S-FPL51 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L16 | Negative Meniscus | J-KZFH9 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L17 | Biconvex Positive | S-FPM3 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L18 | Biconcave Negative (2× Asph) | L-LAH85V — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L19 | Negative Meniscus | S-LAH65 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| L20 | Negative Meniscus (2× Asph) | S-BAL42 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |
| Grp | Biconvex Positive | TAFD55 — compatible spectral proxy; historical supplier, melt, chemistry and process unspecified |