WO 2023/181666 A1 EXAMPLE 4 — SONY / MARUYAMA
| 20 ELEMENTS / 15 GROUPS |
| f = 24.72–67.90 mm |
| F/2.91 (constant) |
| 2ω = 82.36°–35.35° |
| 8 ASPHERICAL SURFACES |
Dual floating inner focus: Gr5 (negative singlet) and Gr6 (positive singlet) move on independent trajectories, driven by four XD Linear Motors.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | Dense flint (870/200, uncertain — no OHARA catalog match) |
| L12 | Biconvex Positive | S-PHM52 (OHARA) |
| L13 | Positive Meniscus | Lanthanum crown (764/485, uncertain — no exact OHARA match) |
| L21 | Negative Meniscus | S-LAL18 (OHARA) |
| L22 | Neg. Meniscus (2× Asph) | 770494 — lanthanum crown (patent nd=1.77002, nu_d=49.4) |
| L23 | Biconcave Negative | Crown (639/554, uncertain — no exact OHARA match) |
| L24 | Positive Meniscus | S-LAH79 (OHARA) |
| L25 | Negative Meniscus | S-PHM52 (OHARA) |
| L31 | Pos. Meniscus (1× Asph) | S-LAH89 (OHARA) |
| L32 | Biconvex Positive | FCD100 (HOYA) |
| L33 | Biconcave Negative | S-LAH66 (OHARA) |
| L41 | Negative Meniscus | S-LAH99 (OHARA) |
| L42 | Biconvex Positive | S-FPL51 (OHARA) |
| L43 | Positive Meniscus | FCD100 (HOYA) |
| L44 | Biconcave Negative | NBFD15 (HOYA, 806333) |
| L45 | Biconvex Positive (2× Asph) | S-LAH89 (OHARA) |
| L51 | Neg. Meniscus (2× Asph) | S-LAH89 class (OHARA) |
| L61 | Pos. Meniscus (1× Asph) | S-PHM52 class (OHARA) |
| L71 | Positive Meniscus | FDS18 (HOYA) |
| L72 | Negative Meniscus | TAFD35 (HOYA, 911353; patent rounds vd to 35.2) |
Detailed analysis available in the interactive viewer above.