MINOLTA AF REFLEX 500mm f/8 — Optical Cross-Section & Ray Tracing

Home / Lenses / Minolta / MINOLTA AF REFLEX 500mm f/8MINOLTA AF REFLEX 500mm f/8US 4,951,078↗, Embodiment 1 — Takashi Okada
500 mm f/8 fixed
f = 495.97 mm patent EFL
f/7.07 area-equivalent annular design aperture
5 groups / 7 elements incl. plug-in filter
All-spherical catadioptric Cassegrain
Focus MechanismProduction lens minimum focus is 4.0 m. US 4,951,078 publishes only the infinity prescription, so close-focus optical spacings are not modeled.
Optical Elements (7 physical; 8 modeled media)ElementTypeGlass
L1Positive MeniscusBSC7 / N-BK7 class (517/642)
M1Annular Mangin Primary MirrorS-LAL52 (OHARA catalog-equivalent to 670571; patent vendor unspecified)
M2Mangin Secondary MirrorBSC7 / N-BK7 class (517/642)
L3Positive MeniscusLAC8 / N-LAK8 class (713/539)
L4Negative MeniscusBSC7 / N-BK7 class (517/642)
L5Nearly Afocal MeniscusS-LAL52 (OHARA catalog-equivalent to 670571; patent vendor unspecified)
L6Negative MeniscusS-LAL52 (OHARA catalog-equivalent to 670571; patent vendor unspecified)
FPlane-Parallel PlateBSC7 / N-BK7 class (517/642)

Element	Type	Glass
L1	Positive Meniscus	BSC7 / N-BK7 class (517/642)
M1	Annular Mangin Primary Mirror	S-LAL52 (OHARA catalog-equivalent to 670571; patent vendor unspecified)
M2	Mangin Secondary Mirror	BSC7 / N-BK7 class (517/642)
L3	Positive Meniscus	LAC8 / N-LAK8 class (713/539)
L4	Negative Meniscus	BSC7 / N-BK7 class (517/642)
L5	Nearly Afocal Meniscus	S-LAL52 (OHARA catalog-equivalent to 670571; patent vendor unspecified)
L6	Negative Meniscus	S-LAL52 (OHARA catalog-equivalent to 670571; patent vendor unspecified)
F	Plane-Parallel Plate	BSC7 / N-BK7 class (517/642)