JP 5649252 B2, Example 1 — Isamu Izuhara, Kyoichi Miyazaki
| 14 ELEMENTS / 10 GROUPS |
| DESIGN f = 45.17–167.24 mm |
| DESIGN F/4.16–5.84 |
| 3 ASPHERICAL SURFACES / 2 ELEMENTS |
| INTERNAL ZOOM: G1, G3, G6 FIXED |
Not modeled: the patent moves G4 and G5 imageward for close focus but prints infinity spacings only, so the focus control changes nothing and 0.9 m is the marketed minimum, not a modeled state. G1, G3 and G6 stay fixed while zooming; spacings are printed at 45.17, 87.71 and 167.24 mm and inferred between them. The patent names no O.I.S. group, so no stabilizer shift is modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Plano-Convex Positive | FK5 (SUMITA catalog equivalent; production supplier unspecified) |
| L2 | Negative Meniscus | S-LAM66 (OHARA catalog equivalent; production supplier unspecified) |
| L3 | Positive Meniscus | FCD1 (HOYA catalog equivalent; production supplier unspecified) |
| L4 | Negative Meniscus | NBFD3 (HOYA catalog equivalent; production supplier unspecified) |
| L5 | Positive Meniscus | N-SF66 (SCHOTT catalog equivalent; production supplier unspecified) |
| L6 | Biconcave Negative | N-LASF44 (SCHOTT catalog equivalent; production supplier unspecified) |
| L7 | Biconvex Positive | D-ZLaF81-25 (CDGM catalog equivalent; production supplier unspecified) |
| L8 | Negative Meniscus | TAFD25 (HOYA catalog equivalent; production supplier unspecified) |
| L9 | Positive Meniscus | FCD1 (HOYA catalog equivalent; production supplier unspecified) |
| L10 | Biconvex Positive | L-BAL42 (OHARA moulding glass, coordinate equivalent; patent nd=1.58250, νd=59.4; production supplier unspecified) |
| L11 | Negative Meniscus | S-TIH4 (OHARA catalog equivalent; production supplier unspecified) |
| L12 | Negative Meniscus | TAC8 (HOYA catalog equivalent; production supplier unspecified) |
| L13 | Negative Meniscus | TAC8 (HOYA catalog equivalent; production supplier unspecified) |
| L14 | Positive Meniscus | J-SF03 (HIKARI catalog equivalent; production supplier unspecified) |