JP2018205474A Example 1 — Canon / Yamagishi
| 11 elements / 9 groups |
| Patent f = 55.986 mm; scaled ×1.60754 |
| Computed scaled EFL ≈ 89.96 mm |
| F/2.91 design; f/2.8 marketed |
| Image circle ≈ 69.4 mm from scaled patent image height |
| Patent prescription all spherical |
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-NSL36 (OHARA) |
| L2 | Positive Meniscus | S-LAH55V (OHARA) |
| L3 | Biconcave Negative | N-KZFS5 (Schott) / S-NBH5 class |
| L4 | Biconvex Positive | TAFD35 (HOYA) |
| L5 | Biconvex Positive | S-FPL51 (OHARA) / FCD1 class UD fluorophosphate |
| L6 | Biconcave Negative | S-NBH52 (OHARA) |
| L7 | Negative Meniscus | S-LAM7 (OHARA) |
| L8 | Positive Meniscus | S-LAH66 (OHARA) |
| L9 | Biconvex Positive | S-FPM2 (OHARA) |
| L10 | Biconcave Negative | S-BAL3 (OHARA) |
| L11 | Positive Meniscus | S-LAH60V (OHARA) |
Detailed analysis available in the interactive viewer above.