JPWO2020/157904 A1 Example 1 — Nikon / Makita, Itō, Miwa
| 19 ELEMENTS / 15 GROUPS |
| f = 24.7–194.0 mm (design) |
| F/4.12–6.50 (design) |
| 2ω ≈ 85.2°–12.3° |
| 3 ASPHERICAL SURFACES |
| 3 ED ELEMENTS |
Internal focus — G5 (cemented doublet L51+L52) translates toward image. Travel: 0.9 mm (W) to 9.7 mm (T).
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-LAH96 / TAFD45 (190366/3127) |
| L12 | Biconvex Positive | PCD4 equiv. (159319/6790) |
| L13 | Positive Meniscus | PCD4 equiv. (159319/6790) |
| L21 | Negative Meniscus | 954323 — ultra-high-index lanthanum (S-LAH98 / TAFD45 family) |
| L22 | Biconcave Negative | N-LAK33B equiv. (175500/5233) |
| L23 | Biconvex Positive | S-NPH2 (192286/2088) |
| L24 | Biconcave Negative | TAFD25 equiv. (181600/4659) |
| L31 | Biconvex Positive | 903357 — high-index lanthanum flint (patent nd=1.90265, νd=35.72) |
| L32 | Negative Meniscus | 001291 — ultra-high-index dense flint (patent nd=2.00100, νd=29.12) |
| L33 | Biconvex Positive | N-BAF4 equiv. (157957/5374) |
| L34 | Negative Meniscus | 954323 — ultra-high-index lanthanum (S-LAH98 / TAFD45 family) |
| L41 | Biconvex Positive | S-LAH55V equiv. (183481/4273) |
| L42 | Negative Meniscus | S-LAH96 / TAFD45 (190366/3127) |
| L43 | Negative Meniscus | 954323 — ultra-high-index lanthanum (S-LAH98 / TAFD45 family) |
| L44 | Biconvex Positive (1× Asph) | S-FPL51 (OHARA) |
| L51 | Biconvex Positive | S-TIH53 (OHARA) |
| L52 | Biconcave Negative (1× Asph) | 851401 — dense lanthanum flint (near S-LAH89; patent nd=1.85135, νd=40.13) |
| L61 | Neg. Meniscus (1× Asph) | Lanthanum flint (182080/4251, uncertain — possibly CDGM H-LAF3) |
| L62 | Biconvex Positive | 684376 — titanium flint (patent nd=1.68376, νd=37.57) |
Detailed analysis available in the interactive viewer above.