US 2009/0296231 A1 — Numerical Embodiment 2
| 23 elements / 19 groups |
| Patent f = 72.14-193.97 mm |
| Patent FNO = 2.9; marketed f/2.8 |
| 2ω = 33.4°-12.7° |
| 1 fluorite + 5 UD elements |
| All spherical |
Inner-focus design using the L1R subunit (L4-L5). US 2009/0296231 A1 does not tabulate close-focus spacings for Numerical Embodiment 2, so the data file models infinity-focus zoom kinematics only.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-NBH51 (OHARA) |
| L2 | Biconvex Positive | S-FPL51 (OHARA) |
| L3 | Positive Meniscus | S-FPL51 (OHARA) |
| L4 | Negative Meniscus | S-TIH6 (OHARA) |
| L5 | Plano-Convex Positive | S-FPL51 (OHARA) |
| L6 | Biconcave Negative | S-LAH65V (OHARA) |
| L7 | Biconcave Negative | S-FPL51 (OHARA) |
| L8 | Positive Meniscus | S-TIH53 (OHARA) |
| L9 | Biconcave Negative | S-LAL14 (OHARA) |
| L10 | Biconvex Positive | S-LAL12 (OHARA) |
| L11 | Positive Meniscus | CaF2 fluorite (patent-listed) |
| L12 | Negative Meniscus | S-LAM66 (OHARA) |
| L13 | Positive Meniscus | S-LAH65V (OHARA) |
| L14 | Positive Meniscus | S-LAH66 (OHARA) |
| L15 | Negative Meniscus | S-TIH3 (OHARA) |
| L16 | Positive Meniscus | S-FPL51 (OHARA) |
| L17 | Biconvex Positive | S-TIH6 (OHARA) |
| L18 | Negative Meniscus | S-BAL42 (OHARA) |
| L19 | Biconcave Negative | S-LAM2 (OHARA) |
| L20 | Biconvex Positive | S-LAH65V (OHARA) |
| L21 | Positive Meniscus | S-FSL5 (OHARA) |
| L22 | Negative Meniscus | S-LAH60V (OHARA) |
| L23 | Positive Meniscus | S-LAH60V (OHARA) |
Detailed analysis available in the interactive viewer above.