WO 2017/221949 A1, Example 1 — Akira Sawamoto
| 9 ELEMENTS / 7 GROUPS |
| 45.0 mm f/3.5 (MARKETING) |
| RAW d-LINE MODEL EFL ≈ 45.119 mm |
| MODELED f/3.416 FROM PATENT STOP De |
| 56 mm IMAGE CIRCLE |
| FULL / UNIT FOCUS |
CONSTRAINED_RECONSTRUCTION: the patent publishes rigid full-system focusing but no close-focus row. The source infinity row keeps BF = 26.88 mm even though the retained raw d-line prescription computes BFL = 27.0510181548 mm. The close state changes only the rear image gap, solving the published unit-focus mechanism against Hasselblad's 0.40 m object-to-image-plane MFD at BF = 34.1491136786 mm; no internal spacing or source infinity spacing is silently repaired.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconcave Negative | 548458 class (vendor unproven) |
| L2 | Positive Meniscus (convex to object) | 917316 class (vendor unproven) |
| L3 | Biconvex Positive | 697485 class (vendor unproven) |
| L4 | Negative Meniscus (convex to image) | 699301 class (vendor unproven) |
| L5 | Biconcave Negative | 850323 class (vendor unproven) |
| L6 | Biconvex Positive | 649530 class (vendor unproven) |
| L7 | Biconvex Positive | 850323 class (vendor unproven) |
| L8 | Negative Meniscus (convex to object) | 835427 class (vendor unproven) |
| L9 | Negative Meniscus (convex to image) | 487702 class (vendor unproven) |