US 2016/0154221 A1 EXAMPLE 1 — NODA & CHO / FUJIFILM
| 17 ELEMENTS / 12 GROUPS |
| f = 16.5 – 53.4 mm (PATENT) / 16 – 55 mm (MARKETED) |
| F/2.88 – F/2.74 – F/2.89 (PATENT); F/2.8 CONSTANT (MARKETED) |
| 2ω = 87.0° – 28.8° (PATENT, PARAXIAL) |
| 6 ASPHERICAL SURFACES (3 ELEMENTS) |
| 3 ED ELEMENTS (S-FPM3, 2× S-FPL51) |
Inner focus by G4 translation; G4 (L41 + L42+L43 cemented) moves toward the image plane for closer focus. Linear-motor driven (the 'LM' in the product name). G5 (field flattener) is stationary for weather sealing and microlens consistency.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | OHARA S-TIH53 |
| L12 | Biconvex Positive | OHARA S-PHM52 |
| L13 | Biconvex Positive | Near OHARA S-LAL60 (755523) |
| L21 | Neg. Meniscus (2× Asph) | HOYA M-TAFD305 |
| L22 | Biconcave Negative | OHARA S-LAL14 |
| L23 | Biconvex Positive | OHARA S-LAH95 |
| L24 | Negative Meniscus | OHARA S-LAL18 |
| L31 | Pos. Meniscus (2× Asph) | Near OHARA L-TIM28 (685309) |
| L32A | Negative Meniscus | OHARA S-TIH53 |
| L32B | Biconvex Positive | OHARA S-FPM3 (ED) |
| L33A | Positive Meniscus | OHARA S-FPL51 (ED) |
| L33B | Biconcave Negative | OHARA S-LAH52 |
| L34 | Biconvex Pos. (2× Asph) | Near OHARA L-PHM52 (619636) |
| L41 | Plano-Concave | OHARA S-PHM52 |
| L42 | Plano-Concave | OHARA S-TIH53 |
| L43 | Biconvex Positive | OHARA S-FPL51 (ED) |
| L51 | Biconvex Positive | OHARA S-NPH3 |
Detailed analysis available in the interactive viewer above.