OLYMPUS G.ZUIKO AUTO-S 55mm f/1.2 — Optical Cross-Section & Ray Tracing

Home / Lenses / Olympus / OLYMPUS G.ZUIKO AUTO-S 55mm f/1.2OLYMPUS G.ZUIKO AUTO-S 55mm f/1.2US 3,743,387 — Jihei Nakagawa / Olympus Optical Co.
7 ELEMENTS / 6 GROUPS
f ≈ 55.0 mm
F/1.2
2ω = 43°
ALL SPHERICAL
Focus MechanismUnit focus — entire optical assembly moves forward on straight helicoid.
Optical Elements (7)ElementTypeGlass
L1Positive MeniscusLaSF (S-LAH65 family, OHARA)
L2Positive MeniscusLaSF (S-LAH53 equivalent, OHARA)
L3Negative Meniscus762271 — NbF/SF dense flint family (patent nd=1.7618, νd=27.1; no exact public catalog match)
L4Negative MeniscusSF (S-TIH10 equivalent, OHARA / SF10 SCHOTT)
L5Positive Meniscus755524 — LaK lanthanum crown family (patent nd=1.7550, νd=52.4; no exact public catalog match)
L6Positive MeniscusLaK (N-LAK8 family, SCHOTT / LAC8 HOYA)
L7Biconvex PositiveLaK (N-LAK8 family, SCHOTT / LAC8 HOYA)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Positive Meniscus	LaSF (S-LAH65 family, OHARA)
L2	Positive Meniscus	LaSF (S-LAH53 equivalent, OHARA)
L3	Negative Meniscus	762271 — NbF/SF dense flint family (patent nd=1.7618, νd=27.1; no exact public catalog match)
L4	Negative Meniscus	SF (S-TIH10 equivalent, OHARA / SF10 SCHOTT)
L5	Positive Meniscus	755524 — LaK lanthanum crown family (patent nd=1.7550, νd=52.4; no exact public catalog match)
L6	Positive Meniscus	LaK (N-LAK8 family, SCHOTT / LAC8 HOYA)
L7	Biconvex Positive	LaK (N-LAK8 family, SCHOTT / LAC8 HOYA)