US 2020/0142168 A1, Example 1 — Hiroki Harada
| 20 ELEMENTS / 16 GROUPS |
| f = 24–70 mm |
| F/2.8 |
| 2ω = 85.0–34.4° |
| 4 ASPHERICAL SURFACES |
Inner focus: G21 (L21–L25) moves 6.735 mm toward the image at every zoom station (patent ¶[0154], Table 1); G1, G22, G3 and G4 stay fixed. Published imaging distances 0.418 / 0.381 / 0.397 m at W / M / T.
| Element | Type | Glass |
|---|---|---|
| L11 | Neg. Meniscus (1× Asph) | M-NBF1 (Hoya catalog equivalent; patent code 744495, supplier unspecified) |
| L12r | Asph. Resin Layer | UV-curing resin |
| L12g | Biconcave Negative | J-LASF015 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L13 | Positive Meniscus | TAFD55 (HOYA catalog equivalent, 001291 HRI; S-LAH99 same code; patent gives nd/νd only) |
| L21 | Biconvex Positive | J-PSKH4 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L22 | Positive Meniscus | J-PSKH4 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L23 | Biconvex Positive | J-PSKH4 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L24 | Biconcave Negative | J-LASFH13 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L25 | Biconvex Positive | J-LASF016 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L26 | Biconvex Positive | J-LASF09A (HIKARI catalog equivalent; patent gives nd/νd only) |
| L31 | Biconcave Negative | J-LASF015 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L32 | Neg. Meniscus (concave obj.) | J-PSK03 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L33 | Biconvex Positive | J-SF03 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L34 | Biconcave Negative | J-PSKH4 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L35 | Positive Meniscus | J-SF6 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L41 | Biconvex Positive (1× Asph, ED) | M-FCD500 (HOYA catalog equivalent, 553717 mold-press ED; patent gives nd/νd only) |
| L42 | Neg. Meniscus (concave img.) | S-LAH55 (OHARA catalog equivalent, 835427; patent gives nd/νd only) |
| L43 | Biconvex Positive | J-PSKH1 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L44 | Biconvex Positive | J-FKH1 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L45 | Biconcave Negative | J-SF6 (HIKARI catalog equivalent; patent gives nd/νd only) |
| L46 | Pos. Meniscus (1× Asph) | LAC13 (HOYA catalog equivalent, 694533; patent gives nd/νd only) |