WO 2021/117429 A1 — Fumiaki Ohtake
| 20 mm |
| f/1.8 |
| 14 elements / 11 groups |
| 3 ED elements |
| 3 aspherical elements |
| Multi-FS |
PUBLISHED focus model: G2 moves imageward while G4 moves objectward from infinity to the near row. The patent also publishes a middle row (D8=4.66117, D10=8.86123, D23=7.83192, D25=8.21231), documented in the data header; the current LensData var schema stores the infinity and near endpoints.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-LAL14 (OHARA; coordinate match) |
| L12g | Negative Meniscus | 773496 class (HIKARI J-LASF016 coordinate representative) |
| L12r | Neg. Meniscus (1× Asph) | Unmatched (hybrid resin layer; patent nd=1.51380, νd=52.97) |
| L13 | Biconcave Negative | J-FKH1 (HIKARI; coordinate match) |
| L14 | Positive Meniscus | J-LASFH21 (HIKARI; coordinate match) |
| L21 | Biconvex Positive | J-LASF015 (HIKARI; coordinate match) |
| L31 | Biconvex Positive | J-LASFH21 (HIKARI; coordinate match) |
| L32 | Biconcave Negative | J-SF03 (HIKARI; coordinate match) |
| L33 | Biconcave Negative | J-SF7 (HIKARI; coordinate match) |
| L34 | Biconvex Positive | J-FKH1 (HIKARI; coordinate match) |
| L35 | Biconvex Positive | J-FKH1 (HIKARI; coordinate match) |
| L36 | Negative Meniscus | J-LASFH21 (HIKARI; coordinate match) |
| L37 | Biconvex Positive | S-TIH57 (OHARA; coordinate match) |
| L41 | Neg. Meniscus (2× Asph) | L-LAH94 (OHARA; coordinate match) |
| L51 | Neg. Meniscus (2× Asph) | L-LAH94 (OHARA; coordinate match) |