WO 2018/139160 A1, Numerical Example 4 — Kouji Katou, Hiromichi Nose
| 16 ELEMENTS / 13 GROUPS |
| DESIGN f = 16.5–33.95 mm |
| DESIGN F/2.88 |
| 7 ASPHERICAL SURFACES / 5 ELEMENTS |
Floating inner focus: the patent moves G2 (L5) and G4 (L8–L10) toward the image when focusing close, matching Sony's two-motor floating system. The patent tabulates infinity focus only and does not give the travel of either group, so the model has no focus travel; 0.28 m is Sony's marketed minimum focus distance.
| Element | Type | Glass |
|---|---|---|
| L1 | Neg. Meniscus (2× Asph) | M-TAF101 (HOYA) |
| L2 | Negative Meniscus | S-LAH55V (OHARA) / TAFD5F (HOYA) |
| L2r | Resin Layer (1× Asph) | Unmatched (UV-cured resin layer of hybrid asphere, nd 1.5342 / νd 41.7) |
| L3 | Biconcave Negative | S-LAH66 (OHARA) / TAF1 (HOYA) |
| L4 | Positive Meniscus | Unmatched (dense titanium flint, nd 1.912366 / νd 21.9; nearest catalog row outside runtime window) |
| L5 | Biconvex Positive | S-BSM25 (OHARA) / BACED5 (HOYA) |
| L6 | Negative Meniscus | Unmatched (lanthanum flint, nd 1.834287 / νd 39.1) |
| L7 | Biconvex Positive (2× Asph) | M-BACD12 (HOYA) / L-BAL42 (OHARA) |
| L8 | Negative Meniscus | S-BAH28 (OHARA) / BAFD8 (HOYA) |
| L9 | Positive Meniscus | S-FSL5 (OHARA) / FC5 (HOYA) |
| L10 | Biconvex Positive (1× Asph) | M-LAC130 (HOYA) / J-LAK13 (HIKARI) |
| L11 | Biconvex Positive | FCD705 (HOYA) class, ED fluorophosphate |
| L12 | Biconcave Negative | Unmatched (lanthanum dense flint, nd 1.901747 / νd 34.6) |
| L13 | Biconvex Positive | S-FPL51 (OHARA) / FCD1 (HOYA), ED fluorophosphate |
| L14 | Biconvex Positive | E-FDS1 (HOYA) / H-ZF62 (CDGM) |
| L15 | Biconcave Negative | TAFD25 (HOYA) / H-ZLaF75A (CDGM) |
| L16 | Biconcave Negative (1× Asph) | M-TAFD307 (HOYA) |