US 2014/0211029 A1 Numerical Embodiment 3 — Canon / Okumura
| 15 elements / 12 groups |
| 55-250mm f/4-5.6 marketed; 56.80-241.32mm patent design |
| APS-C / Canon EF-S |
| All-spherical; L2 optical IS; L5 rear focus |
Rear inner focus by L5; close-focus travel omitted because only infinity zoom spacings are available for the full-field patent columns.
| Element | Type | Glass |
|---|---|---|
| L11 | Plano-Convex Positive | S-FSL5 (OHARA) |
| L12 | Negative Meniscus | S-NBH5 (OHARA) |
| L13 | Positive Meniscus | S-FSL5 (OHARA) |
| L21 | Negative Meniscus | S-LAL8 (OHARA) |
| L22 | Positive Meniscus | S-NPH1 (OHARA) |
| L23 | Plano-Concave Negative | S-LAH65V (OHARA) |
| L31 | Biconvex Positive | S-LAH65V (OHARA) |
| L32 | Biconvex Positive | S-FPL51 (OHARA) |
| L33 | Biconcave Negative | S-LAH95 (OHARA) |
| L41 | Biconcave Negative | NBFD15 (HOYA) |
| L42 | Biconvex Positive | S-LAL18 (OHARA) |
| L43 | Positive Meniscus | S-BSM25 (OHARA) |
| L51 | Positive Meniscus | S-TIH14 (OHARA) |
| L52 | Biconcave Negative | S-LAL14 (OHARA) |
| L61 | Positive Meniscus | S-TIL2 (OHARA) |
Detailed analysis available in the interactive viewer above.