US 2013/0088622 A1, Exemplary Embodiment 4 — Shigenobu Sugita
| MARKETED 18–135mm f/3.5–5.6 |
| PATENT 18.60–130.48mm f/3.59–5.97 |
| 16 ELEMENTS / 11 PATENT CONSTRUCTION GROUPS |
| 6 MOVING ZOOM UNITS |
| 1 ASPHERICAL SURFACE |
CONSTRAINED_RECONSTRUCTION: L4 alone moves objectward from infinity to 0.39 m; d15+d17 is conserved at each zoom position. The patent gives the focus direction but no close-focus spacing rows, so these finite-focus states are code-solved modeling states, not published patent data.
| Element | Type | Glass |
|---|---|---|
| E1 | Negative Meniscus | 847238 — dense flint class |
| E2 | Biconvex Positive | 497816 — ED fluorophosphate class |
| E3 | Positive Meniscus | 603607 — crown class |
| E4 | Negative Meniscus | 835427 — lanthanum crown class |
| E5 | Biconcave Negative | 773496 — lanthanum crown class |
| E6 | Biconvex Positive | 847238 — dense flint class |
| E7 | Biconcave Negative | 773496 — lanthanum crown class |
| E8 | Biconvex Positive | 805254 — dense flint class |
| E9 | Biconcave Negative | 904313 — high-index lanthanum class |
| E10 | Biconvex Positive | 603607 — crown class |
| E11 | Biconvex Positive | 603607 — crown class |
| E12 | Biconcave Negative | 847238 — dense flint class |
| E13 | Biconcave Negative | 750353 — lanthanum flint/crown transition class |
| E14 | Positive Meniscus | 847238 — dense flint class |
| E15 | Negative Meniscus (1× Asph) | 722292 — dense flint class |
| E16 | Biconvex Positive | 596392 — flint class |