JP2020-173366A EXAMPLE 3 — KONICA MINOLTA / NIKON
| 12 ELEMENTS / 8 GROUPS |
| f ≈ 83.0 mm (patent) · 85 mm (production) |
| F/1.85 (patent) · F/1.8 (production) |
| 2ω ≈ 29.26° (patent) · 28°30′ (production) |
| ALL SPHERICAL · 2 ED ELEMENTS |
Floating inner focus: Gr2 (cemented doublet, 2 elements) moves toward image; Gr3 (singlet) moves toward object. Two independent stepping motors (Nikon Multi-Focus System). D2Gr/D3Gr = −0.57; Gr2 travel = +3.84 mm, Gr3 travel = −6.76 mm.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-LAH66 (OHARA) |
| L12 | Positive Meniscus | Fluorophosphate crown (ED) |
| L13 | Biconvex Positive | S-FPL51 (OHARA) |
| L14 | Biconcave Negative | Dense flint (code 850301) |
| L21 | Biconvex Positive | S-NPH2 (OHARA) |
| L22 | Biconcave Negative | Flint (code 603380) |
| L31 | Biconvex Positive | Phosphate crown (nearest: S-FPM2, OHARA) |
| L41 | Plano-Convex Positive | Ultra-high-index La dense flint (code 911353) |
| L42 | Biconcave Negative | Dense flint (code 673322) |
| L43 | Biconvex Positive | Lanthanum crown (code 849438) |
| L44 | Biconcave Negative | Flint (code 603380, same as L22) |
| L45 | Negative Meniscus | Dense flint (nearest: Schott SF2) |
Detailed analysis available in the interactive viewer above.