US 2019/0094496 A1 — Shunsuke Miyagishima, Tetsuya Ori
| 16 ELEMENTS / 10 GROUPS |
| 250 mm f/4 (MARKETED) |
| f = 242.544 mm · F/4.12 (DESIGN) |
| 2ω = 13.4° (PATENT) |
| 2 ED + 1 SUPER ED · INNER FOCUS · OIS |
CONSTRAINED_RECONSTRUCTION: patent-published G2-only inner focus; close focus translates cemented G2 12.285240686 mm objectward to model the production 1.4 m state while conserving D11 + D14 = 25.140 mm. G1, STO, G3, G4, and the image plane remain fixed.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-FSL5 (OHARA) |
| L12 | Biconvex Positive | S-FPL51 (OHARA) |
| L13 | Biconcave Negative | J-LAK7R (HIKARI) |
| L14 | Negative Meniscus (convex to object) | S-NSL36 (OHARA) |
| L15 | Positive Meniscus (convex to object) | S-FPL51 (OHARA) |
| L16 | Positive Meniscus (convex to object) | N-LASF46B (SCHOTT) |
| L17 | Negative Meniscus (convex to object) | S-LAH53 (OHARA) |
| L21 | Negative Meniscus (concave to image) | S-TIL26 (OHARA) |
| L22 | Positive Meniscus (concave to image) | S-FPL55 (OHARA) |
| L31 | Negative Meniscus (concave to image) | S-LAH89 (OHARA) |
| L32 | Biconcave Negative | S-LAL19 (OHARA) |
| L33 | Positive Meniscus (concave to image) | S-TIH53 (OHARA) |
| L41 | Negative Meniscus (concave to image) | S-NPH4 (OHARA) |
| L42 | Biconvex Positive | H-ZBAF52 (CDGM) |
| L43 | Biconvex Positive | S-TIM5 (OHARA) |
| L44 | Negative Meniscus (concave to object) | S-LAL18 (OHARA) |