US 2006/0023317 A1 — Makoto Fujimoto
| 17 ELEMENTS / 12 GROUPS |
| 17-85mm MARKETED / 17.55-82.48mm DESIGN |
| f/4-5.6 MARKETED / f/4.11-5.77 MODELED |
| 0.35 m MFD / 0.20x MAX MAG |
| IMAGE STABILIZER / INNER FOCUS |
| 2 ASPHERICAL SURFACES |
CONSTRAINED_RECONSTRUCTION: L2-only focus solved at Canon's 0.35 m MFD with d5+d13 conserved and a fixed image plane. The numerical solution moves L2 objectward, opposite patent paragraph 0056; tele close focus predicts 0.20214x magnification.
| Element | Type | Glass |
|---|---|---|
| E1 | Negative Meniscus | 847239 optical-glass class (vendor unspecified) |
| E2 | Plano-Convex Positive | 603606 optical-glass class (vendor unspecified) |
| E3 | Positive Meniscus | 734515 optical-glass class (vendor unspecified) |
| E4 | Negative Meniscus | 773496 optical-glass class (vendor unspecified) |
| E5 | Biconcave Negative | 883408 optical-glass class (vendor unspecified) |
| E6 | Biconvex Positive | 805254 optical-glass class (vendor unspecified) |
| E7 | Biconcave Negative | 804466 optical-glass class (vendor unspecified) |
| E8 | Negative Meniscus | 720502 optical-glass class (vendor unspecified) |
| E9 | Biconvex Positive | 487702 optical-glass class (vendor unspecified) |
| E10 | Biconvex Positive | 487702 optical-glass class (vendor unspecified) |
| E11 | Negative Meniscus | 689311 optical-glass class (vendor unspecified) |
| E12 | Positive Meniscus | 847239 optical-glass class (vendor unspecified) |
| E13 | Biconcave Negative | 762401 optical-glass class (vendor unspecified) |
| E14 | Negative Meniscus | 603606 optical-glass class (vendor unspecified) |
| E15 | Biconvex Positive (2x Asph) | 583594 optical-glass class (vendor unspecified) |
| E16 | Positive Meniscus | 487702 optical-glass class (vendor unspecified) |
| E17 | Negative Meniscus | 847239 optical-glass class (vendor unspecified) |