US 2007/0058265 A1 — Numerical Example 2
| 11 elements / 9 groups |
| Design f = 18.693-53.300 mm |
| Patent Fno = 3.63-5.86 |
| 2ω = 72.2°-28.7° |
| 1 aspherical surface |
| single-lens IS unit |
Front-group focusing: Group 1 translates objectward for close focus. Close-focus D8 values are paraxially inferred from the official 0.25 m MFD because the patent provides infinity-focus zoom spacings only.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | S-BSL7 (OHARA) |
| L12 | Negative Meniscus | S-BSM15 (OHARA) |
| L13 | Biconcave Negative | S-BSM15 (OHARA) |
| L14 | Positive Meniscus | S-TIH6 (OHARA) |
| L21 | Positive Meniscus | S-FSL5 (OHARA) |
| L22 | Negative Meniscus | S-TIH53 (OHARA) |
| L23 | Biconvex Positive | S-FSL5 (OHARA) |
| L31 | Biconcave Negative | S-TIM27 (OHARA) |
| L32 | Positive Meniscus | S-TIH11 (OHARA) |
| L41 | Neg. Meniscus (1× Asph) | Unmatched (583/302 flint; obsolete HOYA E-F3-class candidate) |
| L42 | Biconvex Positive | S-FSL5 (OHARA) |
Detailed analysis available in the interactive viewer above.