US 2019/0018229 A1 — Numerical Example 1
| 23 elements / 18 groups |
| 70-200 mm marketed; 72.10-193.99 mm design |
| F2.8 marketed; F2.88 patent design |
| 4 aspherical surfaces / 3 aspherical elements |
| Dual floating focus; OSS group in G6 |
Dual floating internal focus in the patent: G1R moves toward the object and G5 moves toward the image plane from infinity to close focus. Close-focus spacings are not tabulated in the patent, so this data file models the published infinity-focus zoom positions only.
| Element | Type | Glass |
|---|---|---|
| L1F1 | Negative Meniscus | TAF3D / S-LAH65VS class (HOYA/OHARA, 804/465) |
| L1F2 | Biconvex Positive | FCD100 (HOYA, 437/951 Super ED) |
| L1F3 | Positive Meniscus | FCD100 (HOYA, 437/951 Super ED) |
| L1R1 | Negative Meniscus | E-FD1L / S-TIH1 class (HOYA/OHARA, 717/295) |
| L1R2 | Positive Meniscus | FCD515 (HOYA, 593/686 ED) |
| L21 | Biconcave Negative | TAF3D / S-LAH65VS class (HOYA/OHARA, 804/465) |
| L22 | Negative Meniscus | FCD515 (HOYA, 593/686 ED) |
| L23 | Positive Meniscus | FD225 / S-NPH1 class (HOYA/OHARA, 808/228) |
| L24 | Negative Meniscus | TAF3D / S-LAH65VS class (HOYA/OHARA, 804/465) |
| L31 | Biconvex Positive | NBF1 / S-LAM60 class (HOYA/OHARA, 743/492) |
| L32 | Biconvex Positive | FCD1 / S-FPL51 class (HOYA/OHARA, 497/816 ED) |
| L33 | Negative Meniscus | NBFD15 (HOYA, 806/333) |
| L41 | Pos. Meniscus (1× Asph) | S-BAL42 / M-BACD12 class (OHARA/HOYA, 583/594) |
| L42 | Positive Meniscus | FCD1 / S-FPL51 class (HOYA/OHARA, 497/816 ED) |
| L43 | Negative Meniscus | TAFD55 / TAFD55-W (HOYA, 001/291) |
| L44 | Positive Meniscus | E-FL6 / S-TIL26 class (HOYA/OHARA, 567/428) |
| L51 | Biconcave Negative (2× Asph) | S-BAL42 / M-BACD12 class (OHARA/HOYA, 583/594) |
| L61 | Positive Meniscus (1× Asph) | S-BSL7 / BSC7 / N-BK7 class (OHARA/HOYA/SCHOTT, 516-517/641-642) |
| L62 | Negative Meniscus | NBFD15 (HOYA, 806/333) |
| L63 | Biconvex Positive | E-FD5 / S-TIM25 class (HOYA/OHARA, 673/322) |
| L64 | Negative Meniscus | TAFD5G / S-LAH55VS class (HOYA/OHARA, 835/427) |
| L65 | Biconcave Negative | TAC8 / S-LAL18 class (HOYA/OHARA, 729/547) |
| L66 | Negative Meniscus | TAFD30 / S-LAH58 class (HOYA/OHARA, 883/408) |
Detailed analysis available in the interactive viewer above.