US 7,408,719 B2 Example 1 — Olympus / T. Hosoya
| 11 elements / 9 groups |
| f = 149.50 mm patent EFL |
| F/2.0 |
| Four Thirds format |
| 2ω = 8.2° production field |
| All-spherical design |
Internal focus with two floating groups: G2 moves image-ward and G3 plus the aperture stop moves object-ward. Close-focus endpoint is solved at the production 1.4 m specification along the patent Example 1 focus path.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-FSL5 (OHARA) |
| L12 | Positive Meniscus | S-FPL51 (OHARA) |
| L13 | Biconcave Negative | S-TIH11 (OHARA) |
| L14 | Biconvex Positive | S-FPL53 (OHARA) |
| L21 | Biconvex Positive | S-TIH11 (OHARA) |
| L22 | Biconcave Negative | S-LAM2 (OHARA) |
| L31 | Positive Meniscus | S-BSM10 (OHARA) |
| L32 | Negative Meniscus | S-TIH1 (OHARA) |
| L33 | Positive Meniscus | S-TIH6 (OHARA) |
| L41 | Biconcave Negative | S-TIM5 (OHARA) |
| L42 | Biconvex Positive | S-LAH64 (OHARA) |
Detailed analysis available in the interactive viewer above.