JP2017-090535A Example 1 — Olympus / Yanai et al.
| 12-100mm f/4.0 |
| Patent f=12.36-97.98mm, F/4.08 |
| 17 elements / 11 groups |
| 6 aspherical surfaces |
| 5 ED / 1 DSA / 2 Super HR / 1 HR |
Inner focus by the fourth zoom group, the L14-L15 cemented negative doublet. JP2017-090535A Example 1 publishes infinity-focus zoom spacings only; close-focus spacings are not modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-NBH56 (OHARA) |
| L2 | Plano-Convex Positive | S-FPL51 (OHARA) |
| L3 | Positive Meniscus | S-FPL51 (OHARA) |
| L4 | Neg. Meniscus (2× Asph, DSA) | 882372 — M-TAFD307 / MC-TAFD307-class (HOYA moldable high-index; no exact public catalog match) |
| L5 | Biconcave Negative | FCD515 (HOYA) |
| L6 | Biconvex Positive | TAFD40 (HOYA) |
| L7 | Negative Meniscus | S-LAH55V (OHARA) |
| L8 | Biconvex Positive (2× Asph) | L-BAL42-class (OHARA) |
| L9 | Biconvex Positive | S-FPL51 (OHARA) |
| L10 | Negative Meniscus | TAFD35L (HOYA) |
| L11 | Positive Meniscus | S-FPL51 (OHARA) |
| L12 | Negative Meniscus | S-NBH56 (OHARA) |
| L13 | Biconvex Positive (1× Asph) | L-BAL42-class (OHARA) |
| L14 | Negative Meniscus | S-LAH55V (OHARA) |
| L15 | Positive Meniscus | S-NPH1 (OHARA) |
| L16 | Negative Meniscus | TAFD55 (HOYA) |
| L17 | Biconvex Positive (1× Asph) | S-BSL7 / BK7-class (OHARA) |
Detailed analysis available in the interactive viewer above.