US 2008/0212200 A1 — Dayong Li, Akio Arakawa
| 18 ELEMENTS / 13 GROUPS |
| 70-200mm f/2.8 (MARKETING) |
| 71.50-194.00mm F/2.88 (PATENT DESIGN) |
| 0.95 m MFD (CONSTRAINED RECONSTRUCTION) |
| 3 INFERRED LD ELEMENTS |
CONSTRAINED_RECONSTRUCTION: G1R (L3-L5) moves 19.124 mm objectward to 0.95 m; D3 decreases and D8 increases by the same amount at each zoom position, preserving the adjacent-gap sum. The patent's printed 9.124 mm value does not reproduce 0.95 m.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | 786439 coordinate class (vendor unresolved) |
| L2 | Biconvex Positive | 487704 coordinate class (vendor unresolved) |
| L3 | Negative Meniscus | 699301 coordinate class (vendor unresolved) |
| L4 | Biconvex Positive | 487704 coordinate class (vendor unresolved) |
| L5 | Biconvex Positive | 497816 coordinate class (vendor unresolved) |
| L6 | Positive Meniscus | 847238 coordinate class (vendor unresolved) |
| L7 | Biconcave Negative | 640602 coordinate class (vendor unresolved) |
| L8 | Biconcave Negative | 640602 coordinate class (vendor unresolved) |
| L9 | Positive Meniscus | 847238 coordinate class (vendor unresolved) |
| L10 | Biconcave Negative | 786439 coordinate class (vendor unresolved) |
| L11 | Biconvex Positive | 806407 coordinate class (vendor unresolved) |
| L12 | Biconvex Positive | 497816 coordinate class (vendor unresolved) |
| L13 | Negative Meniscus | 847238 coordinate class (vendor unresolved) |
| L14 | Positive Meniscus | 497816 coordinate class (vendor unresolved) |
| L15 | Biconcave Negative | 620363 coordinate class (vendor unresolved) |
| L16 | Biconvex Positive | 834373 coordinate class (vendor unresolved) |
| L17 | Negative Meniscus | 806333 coordinate class (vendor unresolved) |
| L18 | Biconvex Positive | 620363 coordinate class (vendor unresolved) |