US 2022/0171174 A1 — Takahiro Hatada
| 16 ELEMENTS / 12 GROUPS |
| 14–35mm f/4 (marketed) |
| Computed EFL = 14.419–33.959 mm |
| Design F/4.08–4.12 |
| 6 ASPHERICAL SURFACES / 3 UD-CLASS ELEMENTS |
CONSTRAINED_RECONSTRUCTION: L4 moves imageward. Close states are solved at a 0.200 m sensor-plane object distance with one L4 translation degree of freedom and D23 + D25 conserved at each zoom position.
| Element | Type | Glass |
|---|---|---|
| E1 | Negative Meniscus | 773496 class (vendor indeterminate) |
| E2 | Neg. Meniscus (2× Asph) | 583594 class (vendor indeterminate) |
| E3 | Biconcave Negative | 497816-class UD/ED crown (vendor indeterminate) |
| E4 | Biconvex Positive | 834372 class (vendor indeterminate) |
| E5 | Negative Meniscus | 954323 class (vendor indeterminate) |
| E6 | Positive Meniscus | S-TIM27 coefficient proxy (supplier unspecified; patent 640345) |
| E7 | Negative Meniscus | 911353 class (vendor indeterminate) |
| E8 | Biconvex Positive | 516641 class (vendor indeterminate) |
| E9 | Biconcave Negative | 720347 class (vendor indeterminate) |
| E10 | Positive Meniscus | 001255 class (vendor indeterminate) |
| E11 | Negative Meniscus | 804465/466 class (vendor indeterminate) |
| E12 | Biconvex Positive | 497816-class UD/ED crown (vendor indeterminate) |
| E13 | Biconvex Positive (2× Asph) | 497816-class UD/ED crown (vendor indeterminate) |
| E14 | Negative Meniscus | 804465/466 class (vendor indeterminate) |
| E15 | Biconcave Negative (2× Asph) | L-LAH85V-class coordinate match (supplier not established) |
| E16 | Positive Meniscus | S-FSL5-class coordinate match (supplier not established) |