JP H05-034592 A — Hideki Ogawa
| 14 ELEMENTS / 10 GROUPS |
| f = 14.201 mm |
| F/2.8 (DESIGN 1:2.892) |
| FIELD: 2×56.72° (HEADING 113.4°) |
| 1 ASPHERICAL SURFACE |
| REAR FOCUS |
Rear focus: fixed negative Group I; complete positive Group II translates objectward. The close endpoint is inferred from Canon's 0.25 m / 0.10× production specification; the patent publishes only infinity/25 cm aberration plots, not a spacing table.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAL14 (OHARA) |
| L2 | Neg. Meniscus (1× Asph) | S-BSM14 (OHARA) |
| L3 | Negative Meniscus | S-LAL14 (OHARA) |
| L4 | Negative Meniscus | S-LAH66 (OHARA) |
| L5 | Negative Meniscus | S-LAL14 (OHARA) |
| L6 | Biconvex Positive | S-TIM8 (OHARA) |
| L7 | Biconvex Positive | S-TIL26 (OHARA) |
| L8 | Negative Meniscus | S-LAH66 (OHARA) |
| L9 | Negative Meniscus | S-LAH66 (OHARA) |
| L10 | Biconvex Positive | S-BSM14 (OHARA) |
| L11 | Biconcave Negative | S-LAM60 (OHARA) |
| L12 | Biconcave Negative | PBH71 (OHARA historical exact catalog equivalent; patent vendor unspecified) |
| L13 | Biconvex Positive | S-FSL5 (OHARA) |
| L14 | Biconvex Positive | S-LAH65V (OHARA) |