LEICA SUMMILUX-SL 50mm f/1.4 ASPH. I — Optical Cross-Section & Ray Tracing

Home / Lenses / Leica / LEICA SUMMILUX-SL 50mm f/1.4 ASPH. ILEICA SUMMILUX-SL 50mm f/1.4 ASPH. IEP 3 136 147 A1↗ — Daisuke Tanahashi, Yoshihito Souma
11 ELEMENTS / 9 GROUPS
f ≈ 51.963 mm (DESIGN)
F/1.440 (MODELED)
2ω = 45.218° (POS1)
4 ASPHERICAL SURFACES
Focus MechanismPUBLISHED inner focus: Gr1 and Gr3 remain fixed while Gr2 moves objectward. POS1 = infinity, POS2 = 1.0 m at focusT = 0.6, POS3 = 0.6 m at focusT = 1. Piecewise interpolation between those source states is modeling.
Optical Elements (11 physical)ElementTypeGlass
L11Negative Meniscus, convex to objectH-K9L class (coordinate-compatible spectral proxy; coordinate code 517642; supplier/melt unproven)
L12Biconcave NegativeE-FD13 class (coordinate-compatible spectral proxy; coordinate code 741278; supplier/melt unproven)
L13Biconvex PositiveJ-LAK14 class (coordinate-compatible spectral proxy; coordinate code 697555; supplier/melt unproven)
L14Biconvex PositiveN-SF66 class (coordinate-compatible spectral proxy; coordinate code 923209; supplier/melt unproven)
L15Biconvex PositiveFCD515 class (coordinate-compatible spectral proxy; coordinate code 593686; supplier/melt unproven)
L16Biconcave NegativeH-ZF4A class (coordinate-compatible spectral proxy; coordinate code 728283; supplier/melt unproven)
L21Positive Meniscus, convex to objectS-LAH55 class (coordinate-compatible spectral proxy; coordinate code 835427; supplier/melt unproven)
L22Biconcave NegativeJ-SF14 class (coordinate-compatible spectral proxy; coordinate code 762266; supplier/melt unproven)
L23Biconvex Positive (2× Asph)L-LAM69 class (coordinate-compatible spectral proxy; coordinate code 731405; supplier/melt unproven)
L31Biconcave NegativeE-FD15 class (coordinate-compatible spectral proxy; coordinate code 699301; supplier/melt unproven)
L32Biconvex Positive (2× Asph)L-LAH84 class (coordinate-compatible spectral proxy; native d 1.8086/40.42; supplier/melt unproven)

Element	Type	Glass
L11	Negative Meniscus, convex to object	H-K9L class (coordinate-compatible spectral proxy; coordinate code 517642; supplier/melt unproven)
L12	Biconcave Negative	E-FD13 class (coordinate-compatible spectral proxy; coordinate code 741278; supplier/melt unproven)
L13	Biconvex Positive	J-LAK14 class (coordinate-compatible spectral proxy; coordinate code 697555; supplier/melt unproven)
L14	Biconvex Positive	N-SF66 class (coordinate-compatible spectral proxy; coordinate code 923209; supplier/melt unproven)
L15	Biconvex Positive	FCD515 class (coordinate-compatible spectral proxy; coordinate code 593686; supplier/melt unproven)
L16	Biconcave Negative	H-ZF4A class (coordinate-compatible spectral proxy; coordinate code 728283; supplier/melt unproven)
L21	Positive Meniscus, convex to object	S-LAH55 class (coordinate-compatible spectral proxy; coordinate code 835427; supplier/melt unproven)
L22	Biconcave Negative	J-SF14 class (coordinate-compatible spectral proxy; coordinate code 762266; supplier/melt unproven)
L23	Biconvex Positive (2× Asph)	L-LAM69 class (coordinate-compatible spectral proxy; coordinate code 731405; supplier/melt unproven)
L31	Biconcave Negative	E-FD15 class (coordinate-compatible spectral proxy; coordinate code 699301; supplier/melt unproven)
L32	Biconvex Positive (2× Asph)	L-LAH84 class (coordinate-compatible spectral proxy; native d 1.8086/40.42; supplier/melt unproven)