OLYMPUS ZUIKO AUTO-MACRO 50mm f/2 — Optical Cross-Section & Ray Tracing

Home / Lenses / Olympus / OLYMPUS ZUIKO AUTO-MACRO 50mm f/2OLYMPUS ZUIKO AUTO-MACRO 50mm f/2US 4,708,445 EMBODIMENT 6 — OLYMPUS / HISASHI GOTO
9 ELEMENTS / 7 GROUPS
f ≈ 50.0 mm
F/2.0
2ω ≈ 45.6°
ALL SPHERICAL
Focus MechanismFloating element: entire lens advances while the air gap between Group I (L1+L2) and Group II (L3+L4) increases, maintaining aberration correction from infinity to 1:2 magnification.
Optical Elements (9)ElementTypeGlass
L1Negative MeniscusF5 (603/380)
L2Biconvex PositiveS-LAL59 (729/547)
L3Positive MeniscusLAC14 (773/497)
L4Negative MeniscusPBL25 (OHARA, 581408)
L5Biconcave Negative683447 — barium/lanthanum flint family (patent nd=1.68250, νd=44.65; no exact public catalog match)
L6Biconvex PositiveS-LAM61 (OHARA, 720460)
L7Positive MeniscusLAC14 (773/497)
L8Biconvex PositiveLAC14 (773/497)
L9Negative MeniscusSF4 (755/275)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Negative Meniscus	F5 (603/380)
L2	Biconvex Positive	S-LAL59 (729/547)
L3	Positive Meniscus	LAC14 (773/497)
L4	Negative Meniscus	PBL25 (OHARA, 581408)
L5	Biconcave Negative	683447 — barium/lanthanum flint family (patent nd=1.68250, νd=44.65; no exact public catalog match)
L6	Biconvex Positive	S-LAM61 (OHARA, 720460)
L7	Positive Meniscus	LAC14 (773/497)
L8	Biconvex Positive	LAC14 (773/497)
L9	Negative Meniscus	SF4 (755/275)