US 2008/0198475 A1 — Tetsuya Arimoto, Yasushi Yamamoto
| 17 ELEMENTS / 13 GROUPS |
| 24-70mm |
| f/2.8 |
| 84°-34° |
| 2 ASPHERICAL SURFACES |
| INNER FOCUS (Gr2) |
CONSTRAINED_RECONSTRUCTION: Gr2 alone translates for focus, as stated by the patent. Close states are solved at Sony's 0.34 m MFD with d6+d14 conserved at each zoom position; all other groups and the sensor plane stay fixed.
| Element | Type | Glass |
|---|---|---|
| G1 | Negative Meniscus | S-TIH53 (OHARA) — 847238 class |
| G2 | Positive Meniscus | S-LAH55V (OHARA) — 835427 class representative |
| G3 | Positive Meniscus | S-LAH55V (OHARA) — 835427 class representative |
| G4 | Negative Meniscus (1× Asph) | 773496 — S-LAH66 coordinate model (supplier unresolved; source νe=49.36) |
| G5 | Biconcave Negative | N-LASF44 (SCHOTT) — 804465 class |
| G6 | Biconvex Positive | S-TIH53 (OHARA) — 847238 class |
| G7 | Negative Meniscus | N-LAF34 (SCHOTT) — 773496 class |
| G8 | Negative Meniscus | 883408 — S-LAH58 coordinate model (supplier unresolved) |
| G9 | Biconvex Positive | J-LAK10 (HIKARI) — 720503 class representative |
| G10 | Biconvex Positive | S-LAH55V (OHARA) — 835427 class representative |
| G11 | Negative Meniscus | N-LASF46B (SCHOTT) — 904313 class |
| G12 | Biconvex Positive | S-FPL51 (OHARA) — 497816 class representative |
| G13 | Biconvex Positive | S-FPL51 (OHARA) — 497816 class representative |
| G14 | Biconcave Negative | N-LASF46B (SCHOTT) — 904313 class |
| G15 | Biconvex Positive | N-FK5 (SCHOTT) — 487704 class representative |
| G16 | Biconcave Negative (1× Asph) | 773496 — S-LAH66 coordinate model (supplier unresolved; source νe=49.36) |
| G17 | Positive Meniscus | NBFD10 (HOYA) — 834373 class |