US 2006/0209426 A1 Example 1 — Fujinon / Suzuki
| 9 ELEMENTS / 7 GROUPS |
| f ≈ 292.0 mm |
| F/4.66 |
| 2ω ≈ 13.4° |
| ALL SPHERICAL |
Inner focus — Group 20 (G21+G22 cemented doublet) translates rearward.
| Element | Type | Glass |
|---|---|---|
| G11 | Pos. Meniscus | S-BAH27 (OHARA) |
| G12 | Neg. Meniscus | NBFD15 (HOYA, 806333 code) |
| G13 | Biconvex Positive | S-FPL53 (OHARA) |
| G14 | Pos. Meniscus | S-BSM16 (OHARA) |
| G21 | Biconvex Positive (weak) | S-TIH6 (OHARA) |
| G22 | Biconcave Negative | S-LAM2 (OHARA) |
| G31 | Neg. Meniscus | S-LAM60 (OHARA) |
| G32 | Neg. Meniscus | S-TIH6 (OHARA) |
| G33 | Pos. Meniscus | NBFD15 (HOYA, 806333 code) |
Detailed analysis available in the interactive viewer above.