NIKON REFLEX-NIKKOR 500mm f/8 (New) — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON REFLEX-NIKKOR 500mm f/8 (New)NIKON REFLEX-NIKKOR 500mm f/8 (New)US 4,666,259 A — Example 1 / Yutaka Iizuka, Nippon Kogaku
6 elements / 6 groups
f = 499.482 mm
F/6.7 geometric; f/8 effective
2ω = 5°
all-spherical Mangin catadioptric
Focus MechanismFront-unit focus: L1 and M2 move together 8.05 mm toward the object; the rear mirror/corrector block and image plane remain fixed.
Optical Elements (6)ElementTypeGlass
L1Biconvex PositiveBSC7 / N-BK7 class crown (patent 517/641)
M1Positive Mangin MirrorBSC7 / N-BK7 class crown (patent 517/641)
M2Negative Mangin MirrorBSC7 / N-BK7 class crown (patent 517/641)
L21Near-Plano-Concave NegativeBSC7 / N-BK7 class crown (patent 517/641)
L22Negative MeniscusE-C3 (HOYA) / S-NSL3 class crown (518/590)
L23Positive MeniscusUnmatched (lanthanum dense flint, patent 796/410; nearest current class S-LAH52 / K-LaSFn3)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Biconvex Positive	BSC7 / N-BK7 class crown (patent 517/641)
M1	Positive Mangin Mirror	BSC7 / N-BK7 class crown (patent 517/641)
M2	Negative Mangin Mirror	BSC7 / N-BK7 class crown (patent 517/641)
L21	Near-Plano-Concave Negative	BSC7 / N-BK7 class crown (patent 517/641)
L22	Negative Meniscus	E-C3 (HOYA) / S-NSL3 class crown (518/590)
L23	Positive Meniscus	Unmatched (lanthanum dense flint, patent 796/410; nearest current class S-LAH52 / K-LaSFn3)