US 10,191,254 B2 Example 10 — Sony / Katou et al.
| 9 elements / 8 groups |
| f = 28.23 mm patent design |
| F2.0 marketed / F2.06 patent |
| 2ω = 76.54° patent diagonal |
| 3 aspherical elements / 2 ED elements |
Inner focus: only L6 / G2 moves imageward. The close-focus state is paraxially solved in the folded-cover data coordinate for Sony's 0.25 m MF minimum focus distance; AF minimum focus is 0.29 m with shorter travel.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | N-FK5 / FC5 class (Schott/HOYA, 487/704) |
| L2 | Negative Meniscus | LF5 / E-FL5 class (Schott/HOYA, 581/409) |
| L3 | Negative Meniscus | S-TIH53 (OHARA) |
| L4 | Biconvex Positive | S-FPL51 (OHARA) / FCD1 (HOYA) |
| L5 | Biconvex Positive (2× Asph) | M-TAF1 / TAF1 class (HOYA, 773/495) |
| L6 | Negative Meniscus (2× Asph) | M-BACD12 (HOYA) / S-BAL42 (OHARA) class, 583/595 |
| L7 | Positive Meniscus (2× Asph) | M-BACD12 (HOYA) / S-BAL42 (OHARA) class, 583/595 |
| L8 | Positive Meniscus | S-FPL51 (OHARA) / FCD1 (HOYA) |
| L9 | Biconcave Negative | S-TIH53 (OHARA) |
Detailed analysis available in the interactive viewer above.