US 7,359,125 B2, Example 1 — Yoko Kimura, Haruo Sato
| 14 ELEMENTS / 11 GROUPS (+ HYBRID RESIN LAYER) |
| f = 14.4–23.8 mm |
| F/2.88 |
| 2ω = 114.7°–83.8° |
| 3 ASPHERICAL SURFACES · 2 ED ELEMENTS |
Internal focus via the patent's L1 (E7+E8 cemented doublet), which moves toward the image: 4.43 mm (wide) to 4.01 mm (18 mm and tele) from infinity to a 300 mm object-to-image distance.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAH65V (OHARA catalog equivalent) |
| L2 | Neg. Meniscus (1× Asph) | S-LAL12 (OHARA catalog equivalent) |
| L3 | Negative Meniscus | LAK011 (HIKARI catalog equivalent) |
| L4 | Pos. Meniscus (Asph resin layer) | 554381 — hybrid-asphere resin layer (inferred; patent nd=1.55389, νd=38.09; not catalog glass) |
| L5 | Biconcave Negative | J-FKH1 (HIKARI catalog equivalent) |
| L6 | Biconvex Positive | S-LAH63 (OHARA) |
| L7 | Negative Meniscus | S-LAH55 (OHARA) |
| L8 | Positive Meniscus | E-BAF8 (HIKARI catalog equivalent) |
| L9 | Positive Meniscus | J-BK7A (HIKARI catalog equivalent) |
| L10 | Biconcave Negative | S-LAH55 (OHARA) |
| L11 | Biconvex Positive | S-BAL2 (OHARA) |
| L12 | Negative Meniscus | Unmatched (lanthanum crown; patent nd=1.772789, νd=49.45; no catalog glass at this index) |
| L13 | Biconvex Positive | J-FKH1 (HIKARI catalog equivalent) |
| L14 | Negative Meniscus | S-LAH53 (OHARA) |
| L15 | Biconvex Positive (1× Asph) | S-BAL35 (OHARA) |