JP 2025-099854 A — Yasumoto Oginome
| 21 ELEMENTS / 15 GROUPS |
| DESIGN f = 15.50 mm |
| DESIGN F/1.46 |
| 4 ASPHERICAL SURFACES / 2 ELEMENTS |
| EQUISOLID FISHEYE, 2ω = 185.73° |
PUBLISHED inner focus: L8 alone (surfaces 13–14) moves 2.0415 mm toward the image between infinity and the patent's near state, where the object is 435.25 mm ahead of the first surface (about 0.604 m from the image plane, magnification −0.033). The marketed minimum focus distance is 0.385 m, beyond the patent's tabulated range. Intermediate positions are linearly interpolated.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | TAFD30 (HOYA; source-listed example) |
| L2 | Negative Meniscus | TAFD55-W (HOYA; source-listed example) |
| L3 | Positive Meniscus | TAFD30 (HOYA; source-listed example) |
| L4 | Biconcave Negative | FCD100 (HOYA; source-listed example) |
| L5 | Biconcave Negative | FC5 (HOYA; source-listed example) |
| L6 | Biconvex Positive | TAFD55-W (HOYA; source-listed example) |
| L7 | Biconcave Negative | S-BSM14 (OHARA; source-listed example) |
| L8 | Positive Meniscus | S-TIM28 (OHARA; source-listed example) |
| L9 | Biconvex Positive (2× Asph) | MC-TAF401 (HOYA; source-listed example) |
| L10 | Negative Meniscus | FDS20-W (HOYA; source-listed example) |
| L11 | Positive Meniscus | TAFD55-W (HOYA; source-listed example) |
| L12 | Biconvex Positive | FCD515 (HOYA; source-listed example) |
| L13 | Biconvex Positive | FCD915 (HOYA; source-listed example) |
| L14 | Negative Meniscus | NBFD25 (HOYA; source-listed example) |
| L15 | Biconvex Positive | FDS16-W (HOYA; source-listed example) |
| L16 | Negative Meniscus | S-NBH59 (OHARA; source-listed example) |
| L17 | Biconvex Positive | FCD100 (HOYA; source-listed example) |
| L18 | Biconvex Positive | FCD100 (HOYA; source-listed example) |
| L19 | Biconvex Positive | FCD1 (HOYA; source-listed example) |
| L20 | Biconcave Negative | TAFD35 (HOYA; source-listed example) |
| L21 | Biconvex Positive (2× Asph) | MC-NBFD130 (HOYA; source-listed example) |