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 (catalog-compatible spectral proxy; patent 1.804/46.58, catalog 1.803999/46.5834; production supplier unspecified) |
| L2 | Neg. Meniscus (1× Asph) | S-LAL12 (catalog-compatible spectral proxy; patent 1.6779/55.34, catalog 1.6779/55.34; production supplier unspecified) |
| L3 | Negative Meniscus | LAK011 (catalog-compatible spectral proxy; patent 1.741/52.67, catalog 1.741/52.672067; production supplier unspecified) |
| 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 (catalog-compatible spectral proxy; patent 1.49782/82.52, catalog 1.49782/82.57; production supplier unspecified) |
| L6 | Biconvex Positive | S-LAH63 (catalog-compatible spectral proxy; patent 1.8044/39.59, catalog 1.804398/39.5862; production supplier unspecified) |
| L7 | Negative Meniscus | S-LAH55 (catalog-compatible spectral proxy; patent 1.83481/42.72, catalog 1.834807/42.7137; production supplier unspecified) |
| L8 | Positive Meniscus | E-BAF8 (catalog-compatible spectral proxy; patent 1.62374/47.04, catalog 1.62374/47.044346; production supplier unspecified) |
| L9 | Positive Meniscus | J-BK7A (catalog-compatible spectral proxy; patent 1.5168/64.1, catalog 1.5168/64.14; production supplier unspecified) |
| L10 | Biconcave Negative | S-LAH55 (catalog-compatible spectral proxy; patent 1.83481/42.72, catalog 1.834807/42.7137; production supplier unspecified) |
| L11 | Biconvex Positive | S-BAL2 (catalog-compatible spectral proxy; patent 1.57099/50.8, catalog 1.570989/50.799858; production supplier unspecified) |
| L12 | Negative Meniscus | Unmatched (lanthanum crown; patent nd=1.772789, νd=49.45; no catalog glass at this index) |
| L13 | Biconvex Positive | J-FKH1 (catalog-compatible spectral proxy; patent 1.49782/82.52, catalog 1.49782/82.57; production supplier unspecified) |
| L14 | Negative Meniscus | S-LAH53 (catalog-compatible spectral proxy; patent 1.8061/40.94, catalog 1.806098/40.926; production supplier unspecified) |
| L15 | Biconvex Positive (1× Asph) | S-BAL35 (catalog-compatible spectral proxy; patent 1.58913/61.18, catalog 1.58913/61.135024; production supplier unspecified) |