JP 2011-248219 A, Embodiment 1 — Dayong Li
| 16 ELEMENTS / 13 GROUPS |
| DESIGN f = 18.50–291.20 mm |
| DESIGN F/3.44–6.50 |
| 4 ASPHERICAL SURFACES / 3 ELEMENTS |
Infinity focus only. The patent does not say which group focuses, prints no near-focus spacings and does not mention PZD, so no focus movement is modeled; the 0.49 m distance is Tamron's specification. The zoom path passes through the patent's six printed states. Between them G3 and G4 follow smooth curves and G1 and G2 are solved for focal length and focus, so that path is inferred, not factory cam data.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | TAFD25L (HOYA, coordinate equivalent) |
| L2 | Biconvex Positive | FCD1 (HOYA, coordinate equivalent) |
| L3 | Positive Meniscus | PCD4 (HOYA, coordinate equivalent) |
| L4r | Hybrid Aspheric Resin | Unmatched (hybrid asphere layer; chemistry unestablished, nd=1.51460, vd=49.96) |
| L4 | Negative Meniscus | TAFD30 (HOYA, coordinate equivalent) |
| L5 | Biconcave Negative | TAF1 (HOYA, coordinate equivalent) |
| L6 | Biconvex Positive | FDS90 (HOYA, coordinate equivalent) |
| L7 | Negative Meniscus | TAFD5G (HOYA, coordinate equivalent) |
| L8 | Positive Meniscus | TAC8 (HOYA, coordinate equivalent) |
| L9 | Biconvex Positive | FCD1 (HOYA, coordinate equivalent) |
| L10 | Biconvex Positive | FC5 (HOYA, coordinate equivalent) |
| L11 | Negative Meniscus | E-FDS1 (HOYA, coordinate equivalent) |
| L12 | Biconcave Negative (Aspheric) | M-TAFD305 (HOYA, coordinate equivalent) |
| L13 | Positive Meniscus | FD225 (HOYA, coordinate equivalent) |
| L14 | Biconvex Positive (Aspheric) | M-PCD51 (HOYA, coordinate equivalent) |
| L15 | Biconcave Negative | TAFD25L (HOYA, coordinate equivalent) |
| L16 | Biconvex Positive | E-FD15L (HOYA, coordinate equivalent) |