SIGMA 24mm f/1.4 DG DN | Art — Optical Cross-Section & Ray Tracing

Home / Lenses / Sigma / SIGMA 24mm f/1.4 DG DN | ArtSIGMA 24mm f/1.4 DG DN | ArtJP 2023-074094 A Example 1 — Sigma / R. Shioda
17 elements / 14 groups
f = 23.86 mm patent / 24 mm nominal
F1.46 design / F1.4 nominal
2ω = 84.43° patent
8 aspherical surfaces
Focus MechanismInternal focus by the single positive G2 element; d10 increases and d12 decreases by 5.5797 mm from infinity to the patent close-focus state.
Optical Elements (17)ElementTypeGlass
L1Neg. Meniscus (2x Asph)583594 crown class (S-BAL42 / SK12 / D-ZK2 equivalents; patent vendor unspecified)
L2Negative Meniscus (FLD class)437951 fluorophosphate ED class (FCD100 / S-FPL53 equivalents; Sigma FLD class)
L3Biconvex Positive001255 high-index dense flint class (TAFD40 / H-ZLaF90A equivalents)
L4Biconcave Negative613443 lanthanum-flint class (S-NBM51 / LAF45 equivalents)
L5Pos. Meniscus (2x Asph)731405 lanthanum glass class (M-LAF81 / D-LaF79 equivalents)
L6Biconvex Positive593670 low-dispersion crown class (PCD51 / PSKH4 equivalents)
L7Negative Meniscus770297 dense flint class (NBFD29 equivalent class)
L8Biconvex Positive (2x Asph)773495 high-index lanthanum glass class (M-TAF105 equivalent class)
L9Biconvex Positive001291 high-index lanthanum glass class (TAFD55 / S-LAH99 equivalents)
L10Biconcave Negative613443 lanthanum-flint class (S-NBM51 / LAF45 equivalents)
L11Biconvex Positive (SLD class)550755 ED crown class (FCD705 / H-FK55 equivalents; Sigma SLD class)
L12Biconcave Negative855252 dense flint class (NBFD25 / S-NBH56 equivalents)
L13Negative Meniscus770297 dense flint class (NBFD29 equivalent class)
L14Positive Meniscus (FLD class)437951 fluorophosphate ED class (FCD100 / S-FPL53 equivalents; Sigma FLD class)
L15Biconvex Positive001291 high-index lanthanum glass class (TAFD55 / S-LAH99 equivalents)
L16Negative Meniscus613443 lanthanum-flint class (S-NBM51 / LAF45 equivalents)
L17Biconcave Negative (2x Asph)806407 lanthanum-flint class (M-NBFD130 equivalent class)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Neg. Meniscus (2x Asph)	583594 crown class (S-BAL42 / SK12 / D-ZK2 equivalents; patent vendor unspecified)
L2	Negative Meniscus (FLD class)	437951 fluorophosphate ED class (FCD100 / S-FPL53 equivalents; Sigma FLD class)
L3	Biconvex Positive	001255 high-index dense flint class (TAFD40 / H-ZLaF90A equivalents)
L4	Biconcave Negative	613443 lanthanum-flint class (S-NBM51 / LAF45 equivalents)
L5	Pos. Meniscus (2x Asph)	731405 lanthanum glass class (M-LAF81 / D-LaF79 equivalents)
L6	Biconvex Positive	593670 low-dispersion crown class (PCD51 / PSKH4 equivalents)
L7	Negative Meniscus	770297 dense flint class (NBFD29 equivalent class)
L8	Biconvex Positive (2x Asph)	773495 high-index lanthanum glass class (M-TAF105 equivalent class)
L9	Biconvex Positive	001291 high-index lanthanum glass class (TAFD55 / S-LAH99 equivalents)
L10	Biconcave Negative	613443 lanthanum-flint class (S-NBM51 / LAF45 equivalents)
L11	Biconvex Positive (SLD class)	550755 ED crown class (FCD705 / H-FK55 equivalents; Sigma SLD class)
L12	Biconcave Negative	855252 dense flint class (NBFD25 / S-NBH56 equivalents)
L13	Negative Meniscus	770297 dense flint class (NBFD29 equivalent class)
L14	Positive Meniscus (FLD class)	437951 fluorophosphate ED class (FCD100 / S-FPL53 equivalents; Sigma FLD class)
L15	Biconvex Positive	001291 high-index lanthanum glass class (TAFD55 / S-LAH99 equivalents)
L16	Negative Meniscus	613443 lanthanum-flint class (S-NBM51 / LAF45 equivalents)
L17	Biconcave Negative (2x Asph)	806407 lanthanum-flint class (M-NBFD130 equivalent class)