JP 2023-001878 A, Example 7 — Ryosuke Nagami, Hiroki Saito
| 12 ELEMENTS / 9 GROUPS |
| DESIGN f = 8.211 mm |
| DESIGN F/3.60 |
| DESIGN 2ω = 124.4° |
| 6 ASPHERICAL SURFACES / 3 ASPHERICAL ELEMENTS |
Example 7 publishes L15 moving imageward for closer focus, but no numerical close-focus spacing state; the model therefore remains at the published infinity prescription with no internal reconstruction.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 729547 lanthanum-crown class (supplier unconfirmed) |
| L12 | Neg. Meniscus (2x Asph) | 583595 BACD12/ZK2 class (supplier unconfirmed) |
| L13 | Plano-Concave Negative | 603655 phosphate-crown class (supplier unconfirmed) |
| L14 | Biconvex Positive | 613445 KZFH class (supplier unconfirmed) |
| L15 | Biconvex Positive (2x Asph) | 583595 BACD12/ZK2 class (supplier unconfirmed) |
| L16 | Negative Meniscus | 911353 TAFD35/H-ZLaF4LA class (supplier unconfirmed) |
| L17 | Biconvex Positive | H-TF5 coordinate-compatible special-flint proxy (supplier unconfirmed) |
| L21 | Negative Meniscus | 954323 high-index lanthanum-flint class (supplier unconfirmed) |
| L22 | Positive Meniscus | 457903 fluorophosphate/ED class (supplier unconfirmed) |
| L23 | Biconvex Positive (2x Asph) | 583595 BACD12/ZK2 class (supplier unconfirmed) |
| L24 | Plano-Concave Negative | 911353 TAFD35/H-ZLaF4LA class (supplier unconfirmed) |
| L25 | Biconvex Positive | 497816 fluorophosphate/ED class (supplier unconfirmed) |