NIKON AI AF-S NIKKOR ED 400mm f/2.8D II IF — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON AI AF-S NIKKOR ED 400mm f/2.8D II IFNIKON AI AF-S NIKKOR ED 400mm f/2.8D II IFUS 6,239,919 B1↗ — Susumu Sato
11 ELEMENTS / 9 GROUPS
400 mm marketed / 391.999 mm design
f/2.8 marketed / F/2.88 design
3 ED ELEMENTS
6°10′ marketed angle of view
INTERNAL FOCUS
Focus MechanismCONSTRAINED_RECONSTRUCTION: G2 alone translates imageward with D11 + D16 conserved. The patent publishes a 3.8 m checkpoint; the active no-filter model is code-solved to Nikon's 3.4 m MF limit after reference-plane normalization.
Optical Elements (11 physical)ElementTypeGlass
L11Biconvex PositiveJ-FKH1 catalog equivalent (patent 498825; production supplier unspecified)
L12Biconvex PositiveJ-FKH1 catalog equivalent (patent 498825; production supplier unspecified)
L13Biconcave NegativeTAF4 catalog equivalent (patent 788475; production supplier unspecified)
L14Negative Meniscus, convex to objectJ-LASF017 catalog equivalent (patent 797454; production supplier unspecified)
L15Positive Meniscus, convex to objectJ-FKH1 catalog equivalent (patent 498825; production supplier unspecified)
L21Biconcave NegativeE-LAFH2 catalog equivalent (patent 804339; production supplier unspecified)
L22Positive Meniscus, concave to objectSF6 catalog equivalent (patent 805254; production supplier unspecified)
L23Negative Meniscus, concave to objectS-BSM81 catalog equivalent (patent 640600; production supplier unspecified)
L31Biconvex PositiveK-LaK14 catalog equivalent (patent 697556; production supplier unspecified)
L32Negative Meniscus, concave to objectE-LAFH2 catalog equivalent (patent 804339; production supplier unspecified)
L33Biconvex PositiveS-BSM81 catalog equivalent (patent 640600; production supplier unspecified)

Element	Type	Glass
L11	Biconvex Positive	J-FKH1 catalog equivalent (patent 498825; production supplier unspecified)
L12	Biconvex Positive	J-FKH1 catalog equivalent (patent 498825; production supplier unspecified)
L13	Biconcave Negative	TAF4 catalog equivalent (patent 788475; production supplier unspecified)
L14	Negative Meniscus, convex to object	J-LASF017 catalog equivalent (patent 797454; production supplier unspecified)
L15	Positive Meniscus, convex to object	J-FKH1 catalog equivalent (patent 498825; production supplier unspecified)
L21	Biconcave Negative	E-LAFH2 catalog equivalent (patent 804339; production supplier unspecified)
L22	Positive Meniscus, concave to object	SF6 catalog equivalent (patent 805254; production supplier unspecified)
L23	Negative Meniscus, concave to object	S-BSM81 catalog equivalent (patent 640600; production supplier unspecified)
L31	Biconvex Positive	K-LaK14 catalog equivalent (patent 697556; production supplier unspecified)
L32	Negative Meniscus, concave to object	E-LAFH2 catalog equivalent (patent 804339; production supplier unspecified)
L33	Biconvex Positive	S-BSM81 catalog equivalent (patent 640600; production supplier unspecified)