JP 2022-117775 A — Numerical Example 1
| 11 elements / 8 groups |
| f = 21.32 mm design |
| F2.4 nominal / F2.45 design |
| 92° diagonal field |
| 4 aspherical surfaces |
Rear/internal focus with floating aberration-correction group described qualitatively in JP 2022-117775 A; no close-focus spacing table is published.
| Element | Type | Glass |
|---|---|---|
| L1A | Negative Meniscus | S-LAH99 (OHARA) |
| L2A | Neg. Meniscus (2× Asph) | Unmatched (BAL/SK moldable crown; nearest S-BAL42/M-BACD12-type catalog glasses are about 1.583/59.4) |
| L3A | Negative Meniscus | S-FPL51 (OHARA) / FCD1 class |
| L4A | Biconvex Positive | TAFD35 / TAFD35L (Hoya) |
| L5A | Negative Meniscus | S-FPL51 (OHARA) / FCD1 class |
| L6A | Positive Meniscus | TAFD37 / TAFD37A (Hoya) |
| L7A | Positive Meniscus | S-FPL51 (OHARA) / FCD1 class |
| L8A | Negative Meniscus | S-LAH59 (OHARA) |
| L9A | Biconvex Positive | S-FPL53 (OHARA) |
| L10A | Negative Meniscus | S-LAH99 (OHARA) |
| L11A | Biconvex Positive (2× Asph) | S-FPL51 (OHARA) / FCD1 class |
Detailed analysis available in the interactive viewer above.