JP 2023-44106 A — Kohei Uemura, Tetsuichiro Okumura, Naoki Miyagawa
| 13 ELEMENTS / 12 GROUPS |
| 16.48-33.96 mm PATENT ZOOM STATES |
| F/4.12 MODELED |
| 100.24°-65.00° PUBLISHED FULL FIELD |
| 8 ASPHERICAL SURFACES |
PUBLISHED internal focus: GR3 moves objectward. Patent Table 23 supplies infinity and d0=279 mm close spacings at all three zoom states; the external d0 reference plane is unresolved, so no reconstruction to the production 0.28 m wide / 0.24 m tele MFD is applied.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 835427 class (vendor unresolved) |
| L12 | Neg. Meniscus (2x Asph) | 583595 class (vendor unresolved) |
| L13 | Biconcave Negative | 497816 class (vendor unresolved) |
| L14 | Positive Meniscus | 855252 class (vendor unresolved) |
| L21 | Biconvex Positive (2x Asph) | 583595 class (vendor unresolved) |
| L22 | Negative Meniscus | 806333 class (vendor unresolved) |
| L23 | Biconvex Positive | 459902 class (vendor unresolved) |
| L31 | Negative Meniscus | 770297 class (vendor unresolved) |
| L32 | Biconvex Positive (2x Asph) | 497816 class (source nd 1.49710; vendor unresolved) |
| L41 | Positive Meniscus | 946180 class (vendor unresolved) |
| L42 | Negative Meniscus | 911353 class (source vd rounded 35.2; vendor unresolved) |
| L43 | Negative Meniscus (2x Asph) | 851401 class (vendor unresolved) |
| L51 | Positive Meniscus | 900374 class (vendor unresolved) |