US 8,810,918 B2 — Dayong Li
| 17 physical elements / 12 groups (18 modeled media) |
| 24.7-67.799 mm design / 24-70 mm marketed |
| F/2.9 design / f/2.8 marketed |
| 85.0°-34.23° patent full field |
| 6 aspherical surfaces |
NO_INTERNAL_RECONSTRUCTION: Example 4 publishes infinity-focus zoom states only. The 0.38 m manufacturer MFD is retained as metadata; no axial close-focus movement is modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | E-FDS1 (Hoya) |
| L2 | Biconvex Positive | TAF3 (Hoya) |
| L3 | Positive Meniscus | TAF3 (Hoya) |
| L4r | Negative Meniscus (1× Asph) | Unmatched (hybrid-asphere resin layer; nd=1.51460, vd=49.96) |
| L4g | Negative Meniscus | NBFD10 (Hoya) |
| L5 | Biconcave Negative | LAC8 (Hoya) |
| L6 | Biconvex Positive | TAFD25 (Hoya) |
| L7 | Negative Meniscus | FCD1 (Hoya) |
| L8 | Biconvex Positive (2× Asph) | M-PCD4 (Hoya) |
| L9 | Biconvex Positive | FCD1 (Hoya) |
| L10 | Negative Meniscus | TAFD25 (Hoya) |
| L11 | Biconcave Negative (1× Asph) | M-LAC130 (Hoya) |
| L12 | Positive Meniscus | E-FD4 (Hoya) |
| L13 | Biconvex Positive | FCD1 (Hoya) |
| L14 | Biconcave Negative | TAFD25 (Hoya) |
| L15 | Biconvex Positive | LAC8 (Hoya) |
| L16 | Biconcave Negative (2× Asph) | M-TAFD51 (Hoya) |
| L17 | Positive Meniscus | NBF1 (Hoya) |