US 2003/0072085 A1 — Keiko Mizuguchi, Atsushi Shibayama
| 7 ELEMENTS / 6 GROUPS |
| 3 POWER GROUPS: NEGATIVE / POSITIVE / POSITIVE |
| DESIGN f = 5.97-16.88 mm |
| DESIGN F/2.87-5.22 |
| 2 ASPHERICAL SURFACES |
Only infinity-focus zoom states are modeled. The patent gives no finite-focus spacings, and its G3 focus direction differs from Nikon’s production description of G1 focusing.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 834372 — glass class (supplier unresolved) |
| L12 | Biconcave Negative | 804466 — glass class (supplier unresolved) |
| L13 | Positive Meniscus | 805254 — dense-flint class (supplier unresolved) |
| L21 | Biconvex Positive (1× Asph) | J-SK12 — coordinate-compatible spectral proxy (supplier unresolved) |
| L22 | Biconvex Positive | 804466 — glass class (supplier unresolved) |
| L23 | Biconcave Negative | 699301 — glass class (supplier unresolved) |
| L31 | Biconvex Positive (1× Asph) | J-SK12 — coordinate-compatible spectral proxy (supplier unresolved) |