LEICA ELMARIT 90mm f/2.8 — Optical Cross-Section & Ray Tracing

Home / Lenses / Leica / LEICA ELMARIT 90mm f/2.8LEICA ELMARIT 90mm f/2.8US 2,995,980 — ZIMMERMANN & KNETSCH / ERNST LEITZ
5 ELEMENTS / 3 GROUPS
f ≈ 90.1 mm
F/2.8
2ω ≈ 27.0°
ALL SPHERICAL
Focus MechanismUnit focusing — entire optical assembly translates forward via helicoid. Detachable head for Visoflex use.
Optical Elements (5)ElementTypeGlass
L1Biconvex PositiveLaK9 (SCHOTT)
L2Positive MeniscusSF4 (SCHOTT)
L3Biconcave Negative640346 - F-family flint (patent nd=1.63980, vd=34.6; no exact public catalog match)
L4Biconcave NegativeBaSF1 (SCHOTT)
L5Biconvex PositiveLaF2 (SCHOTT)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Biconvex Positive	LaK9 (SCHOTT)
L2	Positive Meniscus	SF4 (SCHOTT)
L3	Biconcave Negative	640346 - F-family flint (patent nd=1.63980, vd=34.6; no exact public catalog match)
L4	Biconcave Negative	BaSF1 (SCHOTT)
L5	Biconvex Positive	LaF2 (SCHOTT)