WO 2024/147268 A1 Example 1 — NIKON / MURATANI
| 16 ELEMENTS / 14 GROUPS |
| f ≈ 132.3 mm |
| F/1.85 |
| 2ω ≈ 18.6° |
| 1 ASPHERICAL SURFACE |
Floating inner focus: G2 (L7, negative) moves toward image, G4 (L13, positive) moves toward object. Counter-directional movement maintains aberration balance. Dual STM stepping motors. Total variable gap sum constant at 36.882 mm.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | SR glass (Nikon proprietary) |
| L2 | Positive Meniscus | ED fluorophosphate (near S-FPL51) |
| L3 | Positive Meniscus | ED fluorophosphate (near S-FPL51) |
| L4 | Biconvex Positive | ED fluorophosphate (near S-FPL51) |
| L5 | Biconcave Negative | Anomalous high-index flint (Nf, non-catalog) |
| L6 | Pos. Meniscus (1× Asph) | N-BK7 / S-BSL7 (PGM asphere) |
| L7 | Negative Meniscus | Barium crown (near S-BAH27) |
| L8 | Positive Meniscus | S-NPH1-type phosphate flint (anomalous dispersion) |
| L9 | Biconcave Negative | Anomalous high-index flint (same as L5) |
| L10 | Positive Meniscus | ED fluorophosphate crown (near S-FPM2) |
| L11 | Biconvex Positive | Lanthanum dense flint |
| L12 | Negative Meniscus | Dense lanthanum flint |
| L13 | Positive Meniscus | Dense lanthanum short flint (non-catalog) |
| L14 | Biconcave Negative | Lanthanum flint (near S-LAM55) |
| L15 | Positive Meniscus | Dense short flint (≈ S-TIH53) |
| L16 | Negative Meniscus | Lanthanum flint (non-catalog) |
Detailed analysis available in the interactive viewer above.