US 7,301,711 B2 — Masakazu Saori
| 15 ELEMENTS / 12 GROUPS |
| f = 16.48–48.50 mm (2.94×) |
| F/2.8 (constant) |
| 2ω ≈ 84.0–32.4° |
| 3 ASPHERICAL ELEMENTS (4 SURFACES) |
| 2 ED ELEMENTS |
Internal focus (IF) via SDM ultrasonic motor. Patent provides zoom-only data; close-focus gaps not modeled.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-TIH53 (OHARA) |
| L12 | Positive Meniscus | S-LAL8 (OHARA) |
| L13 | Positive Meniscus | S-LAH66 (OHARA) |
| L21r | Neg. Meniscus (1× Asph) | UV-cure aspherical resin (not catalog glass) |
| L21g | Negative Meniscus | S-LAH55V (OHARA) |
| L22 | Biconcave Negative | S-LAH55V (OHARA) |
| L23 | Biconvex Positive | S-TIM22 (OHARA) |
| L24 | Biconcave Negative | S-LAH65V (OHARA) |
| L25 | Biconvex Positive | S-TIH53 (OHARA) |
| L31 | Biconvex Positive | S-FPL51 (OHARA) |
| L32 | Biconvex Positive (1× Asph) | K-SKLD5-M (SUMITA K-SKLD5(M) catalog equivalent; production supplier unspecified) |
| L33 | Biconcave Negative | S-LAH60 (OHARA) |
| L41 | Biconvex Positive | S-FPL51 (OHARA) |
| L42 | Negative Meniscus | S-TIH6 (OHARA) |
| L43 | Biconvex Positive | S-FSL5 (OHARA) |
| L44 | Pos. Meniscus (2× Asph) | K-SKLD5-M (SUMITA K-SKLD5(M) catalog equivalent; production supplier unspecified) |