SIGMA 30mm f/1.4 DC HSM | Art — Optical Cross-Section & Ray Tracing

Home / Lenses / Sigma / SIGMA 30mm f/1.4 DC HSM | ArtSIGMA 30mm f/1.4 DC HSM | ArtJP2014142520A Example 1 — Sigma / Daiki Uehara
9 elements / 8 groups
f = 30.785 mm design
F1.4 marketed / F1.46 design
2ω = 50.64°
2 aspherical surfaces
Focus MechanismRear-group focus: G1 fixed; G2 and the stop translate objectward as a rigid group. Close-focus spacing is paraxially extended to Sigma's 0.30 m MFD from the patent's 600 mm focus table.
Optical Elements (9)ElementTypeGlass
L1Negative MeniscusBSC7 (Hoya, 517/642; N-BK7 / S-BSL7 class)
L2Negative MeniscusFC5 (Hoya, 487/704; N-FK5 / S-FSL5 class)
L3Biconvex PositiveBACD16 (Hoya, 620/603; N-SK16 / S-BSM16 class)
L4Plano-Convex PositiveE-FD4L / Ref. E-FD4 (Hoya, 755/275; N-SF4 / S-TIH4 class)
L5Biconcave NegativeFD60 (Hoya, 805/255; N-SF6 / S-TIH6 class)
L6Biconcave NegativeFD140 (Hoya, 762/266; S-TIH14 class)
L7Biconvex PositiveTAF3 (Hoya, 804/465; N-LASF44 / S-LAH65VS class)
L8Positive MeniscusTAC8 (Hoya, 729/547; S-LAL18 class)
L9Biconvex Positive (2× Asph)M-TAF1 (Hoya molded-glass reference, 773/495)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Negative Meniscus	BSC7 (Hoya, 517/642; N-BK7 / S-BSL7 class)
L2	Negative Meniscus	FC5 (Hoya, 487/704; N-FK5 / S-FSL5 class)
L3	Biconvex Positive	BACD16 (Hoya, 620/603; N-SK16 / S-BSM16 class)
L4	Plano-Convex Positive	E-FD4L / Ref. E-FD4 (Hoya, 755/275; N-SF4 / S-TIH4 class)
L5	Biconcave Negative	FD60 (Hoya, 805/255; N-SF6 / S-TIH6 class)
L6	Biconcave Negative	FD140 (Hoya, 762/266; S-TIH14 class)
L7	Biconvex Positive	TAF3 (Hoya, 804/465; N-LASF44 / S-LAH65VS class)
L8	Positive Meniscus	TAC8 (Hoya, 729/547; S-LAL18 class)
L9	Biconvex Positive (2× Asph)	M-TAF1 (Hoya molded-glass reference, 773/495)