US 2020/0049962 A1 Example 1 — Nikon / Tomoki Ito
| 20 ELEMENTS / 12 GROUPS |
| f = 80–400 mm (design 81.6–392.0 mm) |
| F/4.5–5.6 |
| 2ω = 30°10′–6°10′ |
| ALL SPHERICAL · 4 ED + 1 SUPER ED |
Inner focus: G3 translates toward image. D2 increases, D3 decreases. SWM AF drive.
| Element | Type | Glass |
|---|---|---|
| L11 | Neg. Meniscus | LaH dense flint (1903/357) |
| L12 | Biconvex Positive | S-FPL51 class (ED) |
| L13 | Positive Meniscus | FCD100 (HOYA) — Super ED |
| L21 | Biconvex Positive | S-LAH52 (OHARA) |
| L22 | Biconcave Negative | S-FPL51 class (ED) |
| L23 | Biconcave Negative | S-LAH59 (OHARA) |
| L24 | Positive Meniscus | SF6 (Schott) |
| L25 | Biconcave Negative | S-LAH55V (OHARA) |
| L31 | Biconvex Positive | Phosphate crown (ED) |
| L32 | Neg. Meniscus | S-LAH95 (OHARA) |
| L33 | Biconvex Positive | Phosphate crown (ED) |
| L41 | Biconcave Negative | S-LAL18 (OHARA) |
| L42 | Positive Meniscus | LaH dense flint (1903/357) |
| L51 | Biconvex Positive | S-LAM2 (OHARA) |
| L52 | Plano-Convex Positive | S-FSL5 (OHARA) / N-FK5 (Schott) |
| L53 | Plano-Concave Negative | TAFD45 (HOYA) |
| L54 | Plano-Convex Positive | S-NSL36 (OHARA) / K10 (Schott) |
| L55 | Biconvex Positive | S-TIF6 (OHARA) |
| L56 | Plano-Concave Negative | Phosphate crown (proprietary) |
| L57 | Neg. Meniscus | S-LAH55V (OHARA) |
Detailed analysis available in the interactive viewer above.