JP 2024-035865 A Example 1 — Sigma / Murakami
| 13 elements / 10 groups |
| f = 22.31 mm design; 23 mm marketed |
| F1.46 design; F1.4 marketed |
| 2ω = 67.85° patent field |
| 3 aspherical surfaces on 2 elements |
| 3 SLD-class elements |
Inner focus by the single negative G2 element L21; L21 moves image-ward by 4.084 mm from infinity to 0.25 m while G1, the stop, G3, and BF remain fixed.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | FCD705 (HOYA, SLD class) |
| L12 | Negative Meniscus | BSC7 / N-BK7 / S-BSL7 class crown |
| L13 | Positive Meniscus | FDS18 (HOYA, anomalous-dispersion dense flint) |
| L14 | Biconcave Negative | NBFD29 (HOYA) |
| L15 | Biconvex Positive | TAFD32 (HOYA) |
| L16 | Biconvex Positive | TAFD35 (HOYA) |
| L17 | Biconvex Positive | FCD515 (HOYA, SLD class) |
| L18 | Biconvex Positive | FCD515 (HOYA, SLD class) |
| L19 | Biconcave Negative | NBFD25 (HOYA) |
| L21 | Neg. Meniscus (1× Asph) | MP-LAC130 / M-LAC130 (HOYA moldable) |
| L31 | Negative Meniscus | E-FL6 (HOYA) / S-TIL26 (OHARA) class |
| L32 | Biconvex Positive | S-LAH96 (OHARA) |
| L33 | Neg. Meniscus (2× Asph) | MP-NBFD130 / M-NBFD130 (HOYA moldable) |
Detailed analysis available in the interactive viewer above.