WO 2022/259649 A1, Example 5 — Takuro Ono, Kosuke Machida, Ayumu Makida, Keisuke Tsubonoya
| 16 ELEMENTS / 13 GROUPS |
| f = 24.70 – 116.50 mm |
| F/4.00 – F/4.12 |
| 2ω = 86.8° – 19.9° |
| 4 ASPHERICAL SURFACES |
| 3 ED + 1 ASPHERICAL ED |
Internal focus by two groups: G5 (L12 + L13) and G6 (L14) both move toward the object when focusing closer (patent ¶0254). The patent tabulates infinity spacings only; the close-focus placements are calculated (minimum-norm G5/G6 travel that focuses 0.35 m at the wide and tele stations), not published travel.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | J-LASFH13 (HIKARI catalog equivalent; patent 1.90366/31.27) |
| L2 | Positive Meniscus | S-PHM52 (OHARA) |
| L3 | Neg. Meniscus (1× Asph) | M-TAF401 catalog equivalent (patent 775473; production supplier unspecified) |
| L4 | Biconcave Negative | S-LAH60 (OHARA) |
| L5 | Biconvex Positive | NBFD25 (HOYA, 855252) |
| L6 | Negative Meniscus | J-FKH1 (HIKARI catalog equivalent; patent 1.49782/82.57) |
| L7 | Pos. Meniscus (1× Asph) | J-PSKH4 catalog equivalent (patent nd=1.59306, νd=66.97; production supplier unspecified) |
| L8 | Positive Meniscus | S-PHM52 (OHARA) |
| L9 | Biconvex Positive | J-FKH1 (HIKARI catalog equivalent; patent 1.49782/82.57) |
| L10 | Negative Meniscus | TAFD37A (HOYA) |
| L11 | Positive Meniscus | J-FKH1 (HIKARI catalog equivalent; patent 1.49782/82.57) |
| L12 | Negative Meniscus | S-TIH11 (OHARA) |
| L13 | Biconvex Positive | S-LAH66 (OHARA) |
| L14 | Pos. Meniscus (1× Asph) | M-FCD500 (HOYA) |
| L15 | Biconcave Neg. (1× Asph) | M-TAF401 catalog equivalent (same patent melt as L3; production supplier unspecified) |
| L16 | Positive Meniscus | PBH21 (OHARA; historical 923209) |