US 2019/0278068 A1 EXAMPLE 5 — CANON / HATADA
| 21 ELEMENTS / 15 GROUPS |
| f = 24.7–67.9 mm |
| F/2.91 |
| 2ω = 82.4°–35.4° |
| 5 ASPHERICAL SURFACES (3 GMo ELEMENTS) |
Inner focus — L6 (single negative meniscus, E19) moves rearward via Nano USM. Close-focus gap data not available from patent; zoom-only variable gaps shown.
| Element | Type | Glass |
|---|---|---|
| G1n | Negative Meniscus | S-NPH1 (OHARA) |
| G2p | Positive Meniscus | S-LAH66 (OHARA) |
| G3p | Positive Meniscus | S-LAL18 (OHARA) |
| L4 | Negative Meniscus | S-LAH58 (OHARA) |
| L5 | Biconcave Negative | S-FPL51 (OHARA) — UD 1 of 3 |
| L6 | Positive Meniscus | S-NPH53 (OHARA) |
| L7 | Biconcave Negative | S-LAL18 (OHARA) |
| L8 | Biconvex Positive | S-TIM25 (OHARA) |
| L9 | Negative Meniscus | S-LAH55V (OHARA) |
| L10 | Biconvex Positive | S-LAH59 (OHARA) |
| L11 | Biconvex Positive | S-FPL51 (OHARA) — UD 2 of 3 |
| L12 | Negative Meniscus | S-NPH2 (OHARA) |
| L13 | Biconcave Neg. (1× Asph) | S-BAL42 (OHARA) — PGM |
| L14 | Positive Meniscus | S-TIH14 (OHARA) |
| Gfp | Biconvex Positive | S-FPL51 (OHARA) — UD 3 of 3 |
| L16 | Negative Meniscus | S-NBH55 (OHARA) |
| L17 | Biconvex Positive | S-FPM3 (OHARA) |
| L18 | Biconcave Neg. (2× Asph) | S-LAH65V (OHARA) — PGM |
| L19 | Negative Meniscus | S-LAH51 (OHARA) |
| L20 | Neg. Meniscus (2× Asph) | S-BAL42 (OHARA) — PGM |
| Grp | Biconvex Positive | FDS30 (HOYA) or H-ZLaF92 (CDGM) |
Detailed analysis available in the interactive viewer above.