NIKON AF-S ZOOM-NIKKOR 24-85mm f/3.5-4.5G IF-ED

JP 2003-241093 A — Satoshi Hayakawa

15 ELEMENTS / 12 GROUPS
PATENT f = 25.0-82.5 mm
MODELED f/3.6-4.7
1 ED-CLASS ELEMENT
1 HYBRID ASPHERICAL ELEMENT

Focus Mechanism

For close focus, G2 moves toward the object while the other groups stay fixed. Travel to 0.38 m is a constrained estimate at each zoom station; the patent does not publish close-focus spacings.

Optical Elements (15 physical; 16 modeled media)

ElementTypeGlass
L1Negative Meniscus847238 class
L2Biconvex Positive697555 class
L3Positive Meniscus788474/788475 class
L4rHybrid Aspherical LayerUnmatched (thin hybrid-asphere layer, n_d=1.55389, v_d=38.1)
L4Negative Meniscus Substrate835427 class
L5Biconcave Negative804466 class
L6Positive Meniscus808227/808228 high-dispersion class
L7Positive Meniscus847238 class
L8Negative Meniscus847238 class
L9Biconvex Positive589612 class
L10Biconvex Positive517641/517642 crown class
L11Positive Meniscus847238 class
L12Biconcave Negative804466 class
L13Biconvex PositiveJ-FKH1 — coordinate-compatible ED-class spectral proxy (supplier unresolved)
L14Biconvex Positive652585/652586 class
L15Negative Meniscus847238 class