US 2019/0278068 A1 EXAMPLE 2 — HATADA / CANON
| 18 ELEMENTS / 14 GROUPS |
| f = 24.72 – 101.84 mm |
| F/4.12 (design) |
| 2ω ≈ 82.4° – 24.0° |
| 6 ASPHERICAL SURFACES (3 GMo ELEMENTS) |
| 1 UD ELEMENT |
Inner focus — L4 (single element) translates toward image side. Close-focus travel estimated from 0.45 m MFD; patent publishes infinity zoom spacings only.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-NPH1 (OHARA) |
| L2 | Plano-Convex | S-LAL18 (OHARA) |
| L3 | Positive Meniscus | S-LAL18 (OHARA) |
| L4 | Negative Meniscus | S-LAH98 (OHARA) |
| L5 | Biconcave (2× Asph) | L-BAL42 (OHARA PGM) |
| L6 | Biconvex Positive | S-NPH1 (OHARA) |
| L7 | Negative Meniscus | S-LAH65V (OHARA) |
| L8 | Plano-Convex | 911353 — lanthanum (nd=1.91082, νd=35.3) |
| L9 | Negative Meniscus | S-LAH98 (OHARA) |
| L10 | Biconvex Positive | S-FPM2 (OHARA) / MC-7 (HOYA) |
| L11 | Biconcave Negative | S-NBH51 (OHARA) |
| L12 | Positive Meniscus | TAFD40 (HOYA) |
| L13 | Negative Meniscus | S-TIH11 (OHARA) |
| L14 | Plano-Convex | S-FPL51 (OHARA) |
| L15 | Biconvex Positive (2× Asph) | L-BAL42 (OHARA PGM) |
| L16 | Negative Meniscus | S-LAL18 (OHARA) |
| L17 | Neg. Meniscus (2× Asph) | Unmatched 764491 — PGM lanthanum crown (nd=1.76450, νd=49.1; not catalog L-LAM69) |
| L18 | Positive Meniscus | S-LAH65V (OHARA) |
Detailed analysis available in the interactive viewer above.