SCHNEIDER-KREUZNACH XENON 50mm f/1.9 — Optical Cross-Section & Ray Tracing

Home / Lenses / Schneider-Kreuznach / SCHNEIDER-KREUZNACH XENON 50mm f/1.9SCHNEIDER-KREUZNACH XENON 50mm f/1.9CH 346706↗ — Günter Klemt
6 ELEMENTS / 4 GROUPS
f ≈ 50.003 mm
DESIGN f/2.0 (marketed f/1.9)
ALL-SPHERICAL
Focus MechanismFocus travel is not modeled. Table A publishes no focus-motion state; 0.8 m is secondary metadata only.
Optical Elements (6 physical)ElementTypeGlass
L1Positive Meniscus670472 — barium flint; H-ZBaF52 compatible spectral proxy (historical supplier/melt unresolved)
L2Positive MeniscusLAC13 — compatible spectral proxy (historical supplier/melt unresolved)
L3Negative Meniscus664359 — BASF2-class barium flint (supplier not identified by patent)
L4Biconcave Negative640346 — TIM27/FD7/F51 dense-flint class (supplier not identified by patent)
L5Biconvex Positive658508 — SSK5/BSM25/BACED-class crown (supplier not identified by patent)
L6Near-Plano-Convex PositiveN-LAF2 — compatible spectral proxy (historical supplier/melt unresolved)

Element	Type	Glass
L1	Positive Meniscus	670472 — barium flint; H-ZBaF52 compatible spectral proxy (historical supplier/melt unresolved)
L2	Positive Meniscus	LAC13 — compatible spectral proxy (historical supplier/melt unresolved)
L3	Negative Meniscus	664359 — BASF2-class barium flint (supplier not identified by patent)
L4	Biconcave Negative	640346 — TIM27/FD7/F51 dense-flint class (supplier not identified by patent)
L5	Biconvex Positive	658508 — SSK5/BSM25/BACED-class crown (supplier not identified by patent)
L6	Near-Plano-Convex Positive	N-LAF2 — compatible spectral proxy (historical supplier/melt unresolved)