SIGMA 35mm f/1.2 DG II | Art — Optical Cross-Section & Ray Tracing

Home / Lenses / Sigma / SIGMA 35mm f/1.2 DG II | ArtSIGMA 35mm f/1.2 DG II | ArtUS 2025/0334778 A1↗ — Ryosuke Sato
17 ELEMENTS / 13 GROUPS
DESIGN f = 34.60 mm
DESIGN F/1.24
8 ASPHERICAL SURFACES / 4 ELEMENTS
Focus MechanismPublished two-group inner focus: G2 (L2–L3) moves 0.5258 mm and G4 (L12–L13) 0.6211 mm toward the object between infinity and the patent's 1.477 m test state. G1, G3 (G3a, stop, G3b) and G5 stay fixed, apart from a −0.0004 mm G3 residual in the printed gaps. Intermediate gaps are linearly interpolated; nothing is extrapolated to the marketed 0.28 m MFD.
Optical Elements (17 physical)ElementTypeGlass
L1Positive MeniscusFD225 class (HOYA coordinate equivalent; supplier unconfirmed)
L2Negative MeniscusE-FEL2 class (HOYA coordinate equivalent; supplier unconfirmed)
L3Biconvex Positive (2x Asph)NBFD13 class (HOYA coordinate equivalent; supplier unconfirmed)
L4Biconcave NegativeFC5 class (HOYA coordinate equivalent; supplier unconfirmed)
L5Biconcave NegativeE-FD15 class (HOYA coordinate equivalent; supplier unconfirmed)
L6Biconvex PositiveFDS18-W class (HOYA coordinate equivalent; supplier unconfirmed)
L7Biconvex Positive (2x Asph)M-TAF401 class (HOYA coordinate equivalent; supplier unconfirmed)
L8Biconcave NegativeS-NBH58 class (OHARA coordinate equivalent; supplier unconfirmed)
L9Positive MeniscusTAC6L class (HOYA coordinate equivalent; supplier unconfirmed)
L10Negative MeniscusNBFD25 class (HOYA coordinate equivalent; supplier unconfirmed)
L11Biconvex PositiveFCD515 class (HOYA coordinate equivalent; supplier unconfirmed)
L12Biconcave NegativeE-FD15 class (HOYA coordinate equivalent; supplier unconfirmed)
L13Biconvex Positive (2x Asph)L-LAH91 class (OHARA coordinate equivalent; supplier unconfirmed)
L14Biconvex PositiveTAC6L class (HOYA coordinate equivalent; supplier unconfirmed)
L15Biconvex PositiveFDS16-W class (HOYA coordinate equivalent; supplier unconfirmed)
L16Biconcave NegativeS-NBH58 class (OHARA coordinate equivalent; supplier unconfirmed)
L17Biconcave Negative (2x Asph)M-TAFD305 class (HOYA coordinate equivalent; supplier unconfirmed)

Element	Type	Glass
L1	Positive Meniscus	FD225 class (HOYA coordinate equivalent; supplier unconfirmed)
L2	Negative Meniscus	E-FEL2 class (HOYA coordinate equivalent; supplier unconfirmed)
L3	Biconvex Positive (2x Asph)	NBFD13 class (HOYA coordinate equivalent; supplier unconfirmed)
L4	Biconcave Negative	FC5 class (HOYA coordinate equivalent; supplier unconfirmed)
L5	Biconcave Negative	E-FD15 class (HOYA coordinate equivalent; supplier unconfirmed)
L6	Biconvex Positive	FDS18-W class (HOYA coordinate equivalent; supplier unconfirmed)
L7	Biconvex Positive (2x Asph)	M-TAF401 class (HOYA coordinate equivalent; supplier unconfirmed)
L8	Biconcave Negative	S-NBH58 class (OHARA coordinate equivalent; supplier unconfirmed)
L9	Positive Meniscus	TAC6L class (HOYA coordinate equivalent; supplier unconfirmed)
L10	Negative Meniscus	NBFD25 class (HOYA coordinate equivalent; supplier unconfirmed)
L11	Biconvex Positive	FCD515 class (HOYA coordinate equivalent; supplier unconfirmed)
L12	Biconcave Negative	E-FD15 class (HOYA coordinate equivalent; supplier unconfirmed)
L13	Biconvex Positive (2x Asph)	L-LAH91 class (OHARA coordinate equivalent; supplier unconfirmed)
L14	Biconvex Positive	TAC6L class (HOYA coordinate equivalent; supplier unconfirmed)
L15	Biconvex Positive	FDS16-W class (HOYA coordinate equivalent; supplier unconfirmed)
L16	Biconcave Negative	S-NBH58 class (OHARA coordinate equivalent; supplier unconfirmed)
L17	Biconcave Negative (2x Asph)	M-TAFD305 class (HOYA coordinate equivalent; supplier unconfirmed)