JP 2020-118807 A Example A — Canon / Kimura
| 19 ELEMENTS / 13 GROUPS |
| f = 28.9 – 67.9 mm (patent) |
| F/2.06 (constant) |
| 2ω = 73.6° – 35.3° |
| 5 ASPHERICAL SURFACES (4 elements) |
Inner focusing via Group 3 (probable); ring-type USM. No close-focus data in patent — zoom-only model.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-NPH1 (OHARA) |
| L2 | Positive Meniscus | S-LAL18 (OHARA) |
| L3 | Positive Meniscus | S-LAH66 (OHARA) |
| L4 | Neg. Meniscus (1× Asph) | S-LAM54 (OHARA) |
| L5 | Biconcave Negative | M-TAFD305 (HOYA) |
| L6 | Biconvex Positive | S-NPH5 (OHARA) |
| L7 | Positive Meniscus | S-FSL5 (OHARA) |
| L8 | Neg. Meniscus (1× Asph) | S-LAH60 (OHARA) |
| L9 | Plano-Convex Positive | S-LAL18 (OHARA) |
| L10 | Biconvex Pos. (1× Asph) | S-LAH65V (OHARA) |
| L11 | Biconcave Negative | S-NBH8 (OHARA) |
| L12 | Positive Meniscus | S-FPL51 (OHARA) |
| L13 | Biconvex Positive | S-FPL53 (OHARA) |
| L14 | Biconvex Positive | S-FPM2 (OHARA) |
| L15 | Biconvex Positive | S-FPL51 (OHARA) |
| L16 | Biconcave Negative | S-NBH56 (OHARA) |
| L17 | Neg. Meniscus (2× Asph) | S-LAH66 (OHARA) |
| L18 | Biconcave Negative | S-FSL5 (OHARA) |
| L19 | Biconvex Positive | S-NPH2 (OHARA) |
Detailed analysis available in the interactive viewer above.