MINOLTA AF APO Tele 200mm f/2.8 — Optical Cross-Section & Ray Tracing

Home / Lenses / Minolta / MINOLTA AF APO Tele 200mm f/2.8MINOLTA AF APO Tele 200mm f/2.8US 4,786,152 Embodiment 3 — Minolta / Arimoto
200mm f/2.8
8 elements / 7 groups
2ω = 12° in patent; 12°30′ manufacturer angle of view
Two patent-listed anomalous-dispersion crowns
Internal focusing, Unit II
Focus MechanismInternal focusing: Unit II (L5-L7) moves imageward; front Unit I and rear Unit III remain fixed.
Optical Elements (8)ElementTypeGlass
L1Biconvex Positive493836 - AD fluorophosphate crown (theta_gF = 0.539 patent-listed; catalog unresolved)
L2Positive Meniscus493836 - AD fluorophosphate crown (theta_gF = 0.539 patent-listed; catalog unresolved)
L3Positive Meniscus720521 - high-index lanthanum crown (catalog unresolved)
L4Negative Meniscus721334 - dense lanthanum flint (catalog unresolved)
L5Biconvex PositiveE-FD4 (HOYA) / S-TIH4 (OHARA)
L6Biconcave NegativeLAC10 (HOYA) / S-LAL10 (OHARA)
L7Negative MeniscusE-FL5 (HOYA)
L8Biconvex PositiveFC5 (HOYA) / S-FSL5 (OHARA)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Biconvex Positive	493836 - AD fluorophosphate crown (theta_gF = 0.539 patent-listed; catalog unresolved)
L2	Positive Meniscus	493836 - AD fluorophosphate crown (theta_gF = 0.539 patent-listed; catalog unresolved)
L3	Positive Meniscus	720521 - high-index lanthanum crown (catalog unresolved)
L4	Negative Meniscus	721334 - dense lanthanum flint (catalog unresolved)
L5	Biconvex Positive	E-FD4 (HOYA) / S-TIH4 (OHARA)
L6	Biconcave Negative	LAC10 (HOYA) / S-LAL10 (OHARA)
L7	Negative Meniscus	E-FL5 (HOYA)
L8	Biconvex Positive	FC5 (HOYA) / S-FSL5 (OHARA)