US 7,161,746 B2 Example 9 — Nikon / Keiko Mizuguchi
| 10 elements / 7 groups |
| Patent f = 10.565 mm; marketed 10.5 mm |
| Patent FNO = 2.88; marketed f/2.8 |
| 180° diagonal fisheye on DX |
| Patent prescription all spherical |
CRC / floating-group focus is described by the patent and Nikon, but Example 9 publishes only the infinity prescription.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-BSM16 (OHARA) |
| L2 | Negative Meniscus | S-LAH59 (OHARA) |
| L3 | Positive Meniscus | S-LAM52 (OHARA, NR) |
| L4a | Biconcave Negative | S-LAH66 (OHARA) |
| L4b | Biconvex Positive | S-TIH10 (OHARA) |
| L5a | Biconvex Positive | S-NSL36 (OHARA) |
| L5b | Negative Meniscus | S-LAH55V (OHARA) |
| L6a | Biconcave Negative | S-TIH53 (OHARA) |
| L6b | Biconvex Positive ED | N-PK52A / FCD1 class ED (497/816; vendor unresolved) |
| L7 | Biconvex Positive | S-LAL7Q (OHARA) |
Detailed analysis available in the interactive viewer above.