US 2020/0142167 A1, Example 1 — Shohei Kikuchi
| 21 ELEMENTS / 15 GROUPS |
| f ≈ 24.7–232.8 mm |
| F/4.12–6.41 |
| 2ω ≈ 75.1–10.6° |
| 2 ASPHERICAL SURFACES (1 ELEMENT) |
| 2 UD (ULTRA-LOW DISPERSION) ELEMENTS |
Rear inner focus via unit 5 (L18+L19 cemented doublet). L5 moves toward image for close focus. Canon Nano USM actuator.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAH95 (Ohara catalog equivalent; production supplier unspecified) |
| L2 | Biconvex Positive | S-FPL51 (Ohara catalog equivalent; production supplier unspecified) |
| L3 | Positive Meniscus | S-PHM52 (Ohara catalog equivalent; production supplier unspecified) |
| L4 | Negative Meniscus | S-LAH89 (Ohara catalog equivalent; production supplier unspecified) |
| L5 | Biconcave Negative | S-LAH89 (Ohara catalog equivalent; production supplier unspecified) |
| L6 | Biconvex Positive | E-FDS1 (Hoya catalog equivalent; production supplier unspecified) |
| L7 | Biconcave Negative | S-LAH66 (Ohara catalog equivalent; production supplier unspecified) |
| L8 | Biconvex Positive | S-TIH14 (Ohara catalog equivalent; production supplier unspecified) |
| L9 | Plano-Convex Positive | PBL25 (Ohara catalog equivalent; production supplier unspecified) |
| L10 | Plano-Concave Negative | S-LAH99 (Ohara catalog equivalent; production supplier unspecified) |
| L11 | Negative Meniscus | TAFD40 (Hoya catalog equivalent; production supplier unspecified) |
| L12 | Biconvex Positive | S-LAM52 (Ohara catalog equivalent; production supplier unspecified) |
| L13 | Negative Meniscus | S-LAH99 (Ohara catalog equivalent; production supplier unspecified) |
| L14 | Pos. Meniscus (2× Asph) | E48R (qualified spectral proxy; source medium chemistry, supplier and process unspecified) |
| L15 | Biconcave Negative | S-NBH56 (Ohara catalog equivalent; production supplier unspecified) |
| L16 | Biconvex Positive | FCD515 (Hoya catalog equivalent; production supplier unspecified) |
| L17 | Biconvex Positive | S-FPL51 (Ohara catalog equivalent; production supplier unspecified) |
| L18 | Positive Meniscus | S-TIH6 (Ohara catalog equivalent; production supplier unspecified) |
| L19 | Negative Meniscus | S-BSM18 (Ohara catalog equivalent; production supplier unspecified) |
| L20 | Biconcave Negative | S-LAH55 (Ohara catalog equivalent; production supplier unspecified) |
| L21 | Biconvex Positive | S-TIH53 (Ohara catalog equivalent; production supplier unspecified) |