JP 2015-31869 A Example 1 — Canon / Nakahara
| 14 ELEMENTS / 11 GROUPS |
| f = 10.30–17.46 mm |
| F/4.64–5.71 |
| 2ω = 106.0–76.1° |
| 2 ASPHERICAL SURFACES |
Rear focus: Group 3 (L12, single biconcave) moves image-ward along optical axis. STM stepping motor drive.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAH66 (OHARA) |
| L2 | Neg. Meniscus (1× Asph) | PMo optical plastic (cyclo-olefin polymer) |
| L3 | Negative Meniscus | S-LAH66 (OHARA) |
| L4 | Negative Meniscus | S-FPM2 (OHARA) |
| L5 | Biconvex Positive | S-NBH8 (OHARA) |
| L6 | Positive Meniscus | S-FSL5 (OHARA) |
| L7 | Negative Meniscus | TAFD35 (HOYA) |
| L8 | Biconvex Positive | S-TIM5 (OHARA) |
| L9 | Biconcave Negative | S-LAH55 (OHARA) |
| L10 | Biconvex Positive | S-TIM22 (OHARA) |
| L11 | Biconvex Positive | S-FPL51 (OHARA) |
| L12 | Biconcave Negative | TAFD35 (HOYA) |
| L13 | Negative Meniscus | TAFD35 (HOYA) |
| L14 | Biconvex Positive (1× Asph) | S-BAL42 (OHARA) |
Detailed analysis available in the interactive viewer above.