US 7,359,125 B2 EXAMPLE 1 — KIMURA & SATO / NIKON
| 15 ELEMENTS / 11 GROUPS |
| f = 14.4–23.8 mm |
| F/2.88 |
| 2ω = 114.7°–83.8° |
| 3 ASPHERICAL SURFACES · 2 ED ELEMENTS |
Internal focus via L1 (E7+E8 cemented doublet); translates rearward ~4.4 mm from infinity to 300 mm.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAH65 (OHARA) |
| L2 | Neg. Meniscus (1× Asph) | LAC12 (HOYA) |
| L3 | Negative Meniscus | 741527 — lanthanum crown (patent nd=1.74100, nu_d=52.67) |
| L4 | Pos. Meniscus (1× Asph) | 554381 — dense flint (patent nd=1.55389, nu_d=38.09) |
| L5 | Biconcave Negative | ED glass (FPL family, OHARA) |
| L6 | Biconvex Positive | S-LAH63 (OHARA) |
| L7 | Negative Meniscus | S-LAH55 (OHARA) |
| L8 | Positive Meniscus | 624470 — barium flint (patent nd=1.62374, nu_d=47.04) |
| L9 | Positive Meniscus | S-BSL7 (OHARA) |
| L10 | Biconcave Negative | S-LAH55 (OHARA) |
| L11 | Biconvex Positive | S-BAL2 (OHARA) |
| L12 | Negative Meniscus | S-LAH66 (OHARA) |
| L13 | Biconvex Positive | ED glass (FPL family, OHARA) |
| L14 | Negative Meniscus | S-LAH53 (OHARA) |
| L15 | Biconvex Positive (1× Asph) | S-BAL35 (OHARA) |
Detailed analysis available in the interactive viewer above.