US 2021/0003831 A1 — Yasuaki Hagiwara
| 13 ELEMENTS / 11 GROUPS |
| 24-105mm f/4-7.1 (MARKETED) |
| PATENT f = 24.72-101.85 mm |
| PATENT F/4.11-7.31 |
| 2 ASPHERICAL SURFACES |
| B3B OPTICAL IS |
NO_INTERNAL_RECONSTRUCTION: Example 1 publishes infinity-only zoom states. B4 is the negative axial focus unit, but no finite-focus spacings are authored. Canon's 0.13 m minimum manual-focus distance is metadata only.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | 603606 SK14-class (vendor unresolved) |
| L2 | Negative Meniscus | 904313 class (vendor unresolved) |
| L3 | Biconcave Negative | 603606 SK14-class (vendor unresolved) |
| L4 | Positive Meniscus | 847239 class (vendor unresolved) |
| L5 | Plano-Convex Positive | 904313 class (vendor unresolved) |
| L6 | Biconvex Positive | 603606 SK14-class (vendor unresolved) |
| L7 | Biconcave Negative | 904313 class (vendor unresolved) |
| L8 | Negative Meniscus | 911353 class (vendor unresolved) |
| L9 | Biconvex Positive | 603606 SK14-class (vendor unresolved) |
| L10 | Plano-Convex Positive | 603606 SK14-class (vendor unresolved) |
| L11 | Negative Meniscus | 911353 class (vendor unresolved) |
| L12 | Neg. Meniscus (2× Asph) | Unmatched (1.53110/55.9; no exact public catalog match) |
| L13 | Biconvex Positive | 847239 class (vendor unresolved) |