NIKON NIKKOR AUTO 28mm f/2.8 — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON NIKKOR AUTO 28mm f/2.8NIKON NIKKOR AUTO 28mm f/2.8US 3,635,546↗, Example 2 — Ikuo Mori
7 ELEMENTS / 7 GROUPS
DESIGN EFL ≈ 27.998 mm
MODELED f/2.8
PATENT 2ω = 76°
Focus MechanismInfinity prescription only. The production lens focuses to 0.3 m, but no finite-focus optical state is published.
Optical Elements (7 physical)ElementTypeGlass
L1Positive Meniscus648338 — flint coordinate class (supplier unresolved)
L2Negative Meniscus620603 — barium-crown class (S-BSM16 coordinate equivalent; supplier unresolved)
L3Negative Meniscus658573 — lanthanum-crown class (K-LaK11 coordinate equivalent; supplier unresolved)
L4Biconvex Positive670515 — high-index crown (H-LaK67 coordinate-compatible dispersion proxy; supplier unresolved)
L5Biconcave Negative740282 — dense-flint class (exact catalog coordinate; supplier unresolved)
L6Positive Meniscus620603 — barium-crown class (S-BSM16 coordinate equivalent; supplier unresolved)
L7Biconvex Positive697556 — lanthanum-crown class (K-LaK14 coordinate equivalent; supplier unresolved)

Element	Type	Glass
L1	Positive Meniscus	648338 — flint coordinate class (supplier unresolved)
L2	Negative Meniscus	620603 — barium-crown class (S-BSM16 coordinate equivalent; supplier unresolved)
L3	Negative Meniscus	658573 — lanthanum-crown class (K-LaK11 coordinate equivalent; supplier unresolved)
L4	Biconvex Positive	670515 — high-index crown (H-LaK67 coordinate-compatible dispersion proxy; supplier unresolved)
L5	Biconcave Negative	740282 — dense-flint class (exact catalog coordinate; supplier unresolved)
L6	Positive Meniscus	620603 — barium-crown class (S-BSM16 coordinate equivalent; supplier unresolved)
L7	Biconvex Positive	697556 — lanthanum-crown class (K-LaK14 coordinate equivalent; supplier unresolved)