LEICA ELMAR-M 135mm f/4 — Optical Cross-Section & Ray Tracing

Home / Lenses / Leica / LEICA ELMAR-M 135mm f/4LEICA ELMAR-M 135mm f/4DE 1 183 707 B — Ernst Leitz single worked example
5 elements / 3 groups
f ≈ 134.5 mm
F/4
2ω ≈ 18°
all-spherical
unit focus
Focus MechanismUnit focus; the complete optical cell translates, represented by BFD extension from 64.361 mm at infinity to 79.463 mm at 1.5 m.
Optical Elements (5)ElementTypeGlass
L1Plano-Convex PositiveUnmatched (barium crown; patent e-line value stored)
L2Plano-Concave NegativeUnmatched (584/414 e-line light-flint class; LF5-adjacent, no exact public catalog match)
L3Biconvex PositiveN-BK7 / BK7 class (Schott; patent e-line value stored)
L4Biconcave NegativeF5 class (Schott; patent e-line value stored)
L5Positive MeniscusUnmatched SF8-class dense flint (Schott e-line source values; patent ne=1.69416, νe=30.9)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Plano-Convex Positive	Unmatched (barium crown; patent e-line value stored)
L2	Plano-Concave Negative	Unmatched (584/414 e-line light-flint class; LF5-adjacent, no exact public catalog match)
L3	Biconvex Positive	N-BK7 / BK7 class (Schott; patent e-line value stored)
L4	Biconcave Negative	F5 class (Schott; patent e-line value stored)
L5	Positive Meniscus	Unmatched SF8-class dense flint (Schott e-line source values; patent ne=1.69416, νe=30.9)