US 2020/0012073 A1 EXAMPLE 1 — CANON / MAETAKI
| 14 ELEMENTS / 9 GROUPS |
| f ≈ 86.5 mm |
| F/1.24 |
| 2ω ≈ 28.1° |
| 1 ASPHERICAL SURFACE |
| BR OPTICS (CANON PROPRIETARY) |
Internal focus: L2 (8 elements, Groups G2–G6) translates toward object. L1 and L3 fixed.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | S-PHM52 (OHARA) |
| L2 | Biconcave Negative | N-KZFS8 (Schott) |
| L3 | Positive Meniscus | S-NPH2 (OHARA) |
| L4 | Positive Meniscus | S-FPL51 (OHARA) |
| L5 | Neg. Meniscus (1× Asph) | S-NBH56 (OHARA) |
| L6 | Biconcave Negative | S-NBH56 (OHARA) |
| L7 | Biconvex Positive | S-LAH58 (OHARA) |
| L8 | Biconcave Negative | S-TIL2 (OHARA) |
| L9 | Positive Meniscus | BR optics (Canon proprietary organic) |
| L10 | Biconvex Positive | S-LAH98 (OHARA) |
| L11 | Biconvex Positive | S-LAH98 (OHARA) |
| L12 | Biconcave Negative | S-TIM2 (OHARA) |
| L13 | Biconcave Negative | S-TIM28 (OHARA) |
| L14 | Biconvex Positive | TAFD37A (HOYA) |
Detailed analysis available in the interactive viewer above.