US 6,154,324 Example 1 — Murata / Ito
| 9 elements / 7 groups |
| 120 mm marketed; 123.09 mm patent EFL |
| F4 marketed; F3.8 patent design aperture |
| 1:1 macro at 0.395 m |
| All-spherical floating-focus macro |
Floating macro focus: the positive front group, aperture stop, and negative rear group move independently toward the object from infinity to 1:1.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | S-LAH51 (OHARA) |
| L2 | Positive Meniscus | S-PHM52 (OHARA) |
| L3 | Negative Meniscus | S-TIL2 (OHARA) |
| L4 | Positive Meniscus | S-FSL5 (OHARA) |
| L5 | Negative Meniscus | S-TIM22 (OHARA) |
| L6 | Positive Meniscus | S-LAL59 (OHARA) |
| L7 | Negative Meniscus | S-LAH66 (OHARA) |
| L8 | Negative Meniscus | S-LAL12 (OHARA) |
| L9 | Biconvex Positive | S-LAH51 (OHARA) |
Detailed analysis available in the interactive viewer above.