JP 2015-111192 A EXAMPLE 1 — CANON / GYODA
| 6 ELEMENTS / 5 GROUPS |
| f ≈ 24.5 mm |
| F/2.8 |
| 2ω ≈ 58.3° |
| 1 ASPHERICAL SURFACE |
Unit focus — entire optical assembly extends toward object (STM drive).
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | TAFD35 (HOYA) |
| L2 | Negative Meniscus | S-FSL5 (OHARA) |
| L3 | Positive Meniscus | N-LAK14 (Schott) |
| L4 | Negative Meniscus | NBFD15 (HOYA) |
| L5 | Biconvex Positive | S-FPM2 (OHARA) |
| L6 | Pos. Meniscus (1× Asph) | S-BAL42 (OHARA) / 583594 barium crown |
Detailed analysis available in the interactive viewer above.