WO2019/049372 EXAMPLE 1 — NIKON / UMEDA
| 14 ELEMENTS / 11 GROUPS |
| f = 24.72 – 67.91 mm (2.75× zoom) |
| F/4.0 (constant) |
| 2ω ≈ 86.6° (wide) – 33.4° (tele) |
| 4 ASPHERICAL SURFACES (1 AS-ED + 3 asph) |
Internal focus: G4 (L41 + L42) translates toward object. D18 + D22 sum conserved.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-TIH53 (OHARA) |
| L12 | Positive Meniscus | S-LAL14 (OHARA) |
| L21 | Neg. Meniscus (1× Asph) | Uncertain (glass code 744495, no exact catalog match; PGM low-Tg lanthanum crown) |
| L22 | Biconcave Negative | S-LAL14 (OHARA) |
| L23 | Positive Meniscus | TAFD40 (HOYA) |
| L31 | Biconvex Positive (1× Asph) | E-FPL51 (HOYA) |
| L32 | Negative Meniscus | S-LAH55V (OHARA) |
| L33 | Biconvex Positive | S-PHM52 (OHARA) |
| L34 | Biconcave Negative | S-LAH59 (OHARA) |
| L35 | Biconvex Positive | L-LAM60 (OHARA) |
| L41 | Negative Meniscus | S-TIH18 (OHARA) |
| L42 | Biconvex Positive (1× Asph) | M-PCD51 (HOYA) |
| L51 | Pos. Meniscus (1× Asph) | L-BAL35 (OHARA) |
| L52 | Biconcave Negative | S-PHM52 (OHARA) |
Detailed analysis available in the interactive viewer above.