NIKON REFLEX-NIKKOR·C 500mm f/8 — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON REFLEX-NIKKOR·C 500mm f/8NIKON REFLEX-NIKKOR·C 500mm f/8US 3,632,190 Example 1; folded Mangin catadioptric
500 mm nominal focal length
f/8 marketed, F/7 geometric prescription
5 elements / 3 groups
5° diagonal field
manual fixed-aperture mirror lens
Focus MechanismManual front-cell focus in the production lens; the patent publishes only the infinity spacing, so finite-focus variable gaps are not modeled.
Optical Elements (6)ElementTypeGlass
L1Positive MeniscusUnmatched light crown (525/596; K5-class nearest)
M2Convex Secondary Mangin MirrorLLF1 / S-TIL1 / E-FEL1 class (548/459)
L2Plano-Concave NegativeBAK4 / BAC4 class (569/560)
L3Plano-Convex PositiveSF10 / E-FD10 / S-TIH10 class (728/283)
M1Annular Concave Mangin MirrorLLF2 / S-TIL2 / E-FEL2 class (541/472)
L4Negative MeniscusLLF2 / S-TIL2 / E-FEL2 class (541/472)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Positive Meniscus	Unmatched light crown (525/596; K5-class nearest)
M2	Convex Secondary Mangin Mirror	LLF1 / S-TIL1 / E-FEL1 class (548/459)
L2	Plano-Concave Negative	BAK4 / BAC4 class (569/560)
L3	Plano-Convex Positive	SF10 / E-FD10 / S-TIH10 class (728/283)
M1	Annular Concave Mangin Mirror	LLF2 / S-TIL2 / E-FEL2 class (541/472)
L4	Negative Meniscus	LLF2 / S-TIL2 / E-FEL2 class (541/472)