NIKON AF ZOOM-NIKKOR 28-80mm f/3.5-5.6 D — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON AF ZOOM-NIKKOR 28-80mm f/3.5-5.6 DNIKON AF ZOOM-NIKKOR 28-80mm f/3.5-5.6 DJP H11-030748 A↗ — Keiji Moriyama
8 elements / 8 air-spaced groups
2 zoom groups: G1 (-) / G2 (+)
f = 28.8-78.0 mm (patent)
F/3.57-5.81 (patent)
2ω = 76.5°-31.0°
all-spherical prescription
Focus MechanismUnit-focus approximation. The patent gives infinity zoom spacings only; close-focus BFD values are paraxially solved for a 0.4 m setting measured from the image plane.
Optical Elements (8 physical)ElementTypeGlass
L1Biconvex PositiveKF3 (SUMITA catalog equivalent for patent coordinate; production supplier unspecified)
L2Negative MeniscusJ-LASF017 (Hikari catalog-equivalent to patent 797454; supplier not identified)
L3Negative MeniscusJ-LASF017 (Hikari catalog-equivalent to patent 797454; supplier not identified)
L4Positive MeniscusJ-SFH2 (Hikari; patent code 861230)
L5Biconvex Positive617540 - SSK-class crown
L6Positive Meniscus617540 - SSK-class crown
L7Biconcave NegativeDense flint / SF6-family class (805/254)
L8Biconvex PositiveModerate-dispersion flint class (613/370)

Element	Type	Glass
L1	Biconvex Positive	KF3 (SUMITA catalog equivalent for patent coordinate; production supplier unspecified)
L2	Negative Meniscus	J-LASF017 (Hikari catalog-equivalent to patent 797454; supplier not identified)
L3	Negative Meniscus	J-LASF017 (Hikari catalog-equivalent to patent 797454; supplier not identified)
L4	Positive Meniscus	J-SFH2 (Hikari; patent code 861230)
L5	Biconvex Positive	617540 - SSK-class crown
L6	Positive Meniscus	617540 - SSK-class crown
L7	Biconcave Negative	Dense flint / SF6-family class (805/254)
L8	Biconvex Positive	Moderate-dispersion flint class (613/370)