JP 2020-118738 A — Hiroaki Suzuki, Yuka Kudo, Yoshiaki Kurioka
| 16 ELEMENTS / 13 GROUPS |
| DESIGN f = 25.003-100.569 mm |
| MODELED F/4.119 |
| ω = 40.98°-12.06° |
| 8 ASPHERICAL SURFACES |
| 0.300 m / 0.493× TELE MODEL |
CONSTRAINED_RECONSTRUCTION: G4 (L14) translates imageward by 1.594494 / 4.601741 / 13.669691 mm from infinity to a 0.300 m object-to-image state at wide / middle / tele. The adjacent D27 and D29 gaps change equally and oppositely. The normalized tele state gives 0.4926× versus the patent's rounded 0.5× checkpoint.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus, convex to object | 923209 — high-index flint class |
| L2 | Biconvex Positive | 729547 — lanthanum crown class |
| L3 | Positive Meniscus, convex to object | 729547 — lanthanum crown class |
| L4 | Negative Meniscus, convex to object | 773496 — lanthanum crown class |
| L5 | Negative Meniscus (2× Asph), convex to image | 808409 — molded high-index glass class |
| L6 | Biconvex Positive | 921240 — dense flint class |
| L7 | Negative Meniscus, convex to image | 773496 — lanthanum crown class |
| L8 | Positive Meniscus (2× Asph), convex to object | Unmatched (688311; M-FD80 / S-TIM28 / J-SF8 class) |
| L9 | Negative Meniscus, convex to object | 871407 — high-index lanthanum glass class |
| L10 | Positive Meniscus, convex to object | 497816 — ED fluorophosphate crown class |
| L11 | Negative Meniscus, convex to object | 847238 — dense flint class |
| L12 | Biconvex Positive | 437951 — UED fluorophosphate class |
| L13 | Biconvex Positive (2× Asph) | 553718 — aspherical ED glass class (M-FCD500 near match) |
| L14 | Biconcave Negative (2× Asph) | 553718 — aspherical ED glass class (M-FCD500 near match) |
| L15 | Biconcave Negative | 497816 — ED fluorophosphate crown class |
| L16 | Positive Meniscus, convex to object | 900374 — high-index lanthanum glass class |