NIKON NIKKOR 800mm f/8 ED — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON NIKKOR 800mm f/8 EDNIKON NIKKOR 800mm f/8 EDUS 3,774,991↗ — Yoshiyuki Shimizu
5 ELEMENTS / 4 GROUPS
f = 800.095 mm (d-line model)
F/8 (stop calibrated)
6° PATENT DESIGN FIELD
AU-1 UNIT FOCUS; 20 m MFD METADATA (61 ft alternate Nikon row)
Focus MechanismProduction focusing uses the AU-1 unit and Nikon states that focusing-unit super-telephotos moved the entire lens. This model preserves only the patent infinity prescription (NO_INTERNAL_RECONSTRUCTION); closeFocusM=20 m is sourced product metadata and no variable focus spacing is authored.
Optical Elements (5 physical)ElementTypeGlass
L1Biconvex PositiveUnmatched (486815 — fluophosphate crown / ED-class; vendor unresolved)
L2Biconcave NegativeJ-KZFH1 (HIKARI) — patent antimony flint 613443
L3Biconvex Positive570495 — barium flint class (supplier unresolved)
L4Plano-Concave NegativeJ-K3 (HIKARI) nearest curve — patent 519590 crown, Δnd −0.00062
L5Plano-Convex Positive624470 — BaF8-class / barium-flint coordinate (supplier unresolved)

Element	Type	Glass
L1	Biconvex Positive	Unmatched (486815 — fluophosphate crown / ED-class; vendor unresolved)
L2	Biconcave Negative	J-KZFH1 (HIKARI) — patent antimony flint 613443
L3	Biconvex Positive	570495 — barium flint class (supplier unresolved)
L4	Plano-Concave Negative	J-K3 (HIKARI) nearest curve — patent 519590 crown, Δnd −0.00062
L5	Plano-Convex Positive	624470 — BaF8-class / barium-flint coordinate (supplier unresolved)