NIKON AI NIKKOR 85mm f/1.4S — Interactive Lens Diagram

Home / Lenses / Nikon / NIKON AI NIKKOR 85mm f/1.4SNIKON AI NIKKOR 85mm f/1.4SUS 4,396,256 Embodiment 1 — Nippon Kogaku / Fujie
7 ELEMENTS / 5 GROUPS
f ≈ 85.0 mm
F/1.4
2ω ≈ 28.5°
ALL SPHERICAL
Focus MechanismCRC (Close-Range Correction): entire lens extends for close focus; L1–L4 move as a unit by a slightly larger amount than L5, enlarging the d10 air gap. Compensates for field curvature, coma, and astigmatism shifts at close distances. Close-focus variable gap values are estimates.
Optical Elements (7)ElementTypeGlass
L1Positive MeniscusLaK–LaF border (HOYA TAF1 / Schott N-LAF34 class, 773-494)
L2Positive MeniscusLanthanum crown (HOYA LAC14 / Schott N-LAK14 class, 697-556)
L3aBiconvex PositiveDense flint (HOYA FD110 / Schott SF11 class, 785-261)
L3bBiconcave NegativeDense flint (HOYA E-FD4 / Schott SF4 class, 755-275)
L4aBiconcave NegativeLight flint (HOYA E-FL5 / Schott LF5 class, 581-408)
L4bBiconvex PositiveLanthanum flint (HOYA NBF1 / OHARA S-LAM60 class, 744-494)
L5Biconvex PositiveLanthanum flint (HOYA NBF1 / OHARA S-LAM60 class, 744-494)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Positive Meniscus	LaK–LaF border (HOYA TAF1 / Schott N-LAF34 class, 773-494)
L2	Positive Meniscus	Lanthanum crown (HOYA LAC14 / Schott N-LAK14 class, 697-556)
L3a	Biconvex Positive	Dense flint (HOYA FD110 / Schott SF11 class, 785-261)
L3b	Biconcave Negative	Dense flint (HOYA E-FD4 / Schott SF4 class, 755-275)
L4a	Biconcave Negative	Light flint (HOYA E-FL5 / Schott LF5 class, 581-408)
L4b	Biconvex Positive	Lanthanum flint (HOYA NBF1 / OHARA S-LAM60 class, 744-494)
L5	Biconvex Positive	Lanthanum flint (HOYA NBF1 / OHARA S-LAM60 class, 744-494)