US 2017/0068075 A1 — Tatsuyuki Onozaki
| 15 ELEMENTS / 11 GROUPS |
| PATENT f = 28.70–102.38 mm |
| PATENT f/3.6–5.7 |
| FULL FIELD = 76.2°–23.4° |
| 2 ASPHERICAL ELEMENTS / 3 ASPHERICAL SURFACES |
NO_INTERNAL_RECONSTRUCTION: the patent publishes infinity-focus zoom states only. All modeled infinity/close pairs are identical; the manufacturer 0.5 m minimum-focus specification is metadata only.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 847238 — optical-glass class (vendor unresolved) |
| L12 | Biconvex Positive | 816466 — optical-glass class (vendor unresolved) |
| L13 | Positive Meniscus | 816466 — optical-glass class (vendor unresolved) |
| L21R | Negative Meniscus (1× Asph) | Unmatched (synthetic resin aspherical layer; nd=1.52972, νd=42.7) |
| L21G | Negative Meniscus | 883408 — optical-glass class (vendor unresolved) |
| L22 | Biconcave Negative | 729547 — optical-glass class (vendor unresolved) |
| L23 | Biconvex Positive | 728285 — optical-glass class (vendor unresolved) |
| L24 | Negative Meniscus | 788474 — optical-glass class (vendor unresolved) |
| L31 | Biconvex Positive | 697555 — optical-glass class (vendor unresolved) |
| L32 | Negative Meniscus | 800299 — optical-glass class (OHARA S-NBH55 candidate; vendor unresolved) |
| L33 | Biconvex Positive | 497816 — ED crown class (S-FPL51/FCD1/N-PK52A/J-FK01A equivalents; vendor unresolved) |
| L41 | Biconcave Negative | 603607 — optical-glass class (vendor unresolved) |
| L42 | Positive Meniscus | 847238 — optical-glass class (vendor unresolved) |
| L51 | Biconvex Positive (2× Asph) | 589612 — optical-glass class (vendor unresolved) |
| L52 | Biconcave Negative | 720347 — optical-glass class (S-NBH8/N-KZFS8 equivalents; vendor unresolved) |
| L53 | Positive Meniscus | 618634 — optical-glass class (vendor unresolved) |