SIGMA 85mm f/1.4 DG DN | Art — Optical Cross-Section & Ray Tracing

Home / Lenses / Sigma / SIGMA 85mm f/1.4 DG DN | ArtSIGMA 85mm f/1.4 DG DN | ArtJP 2021-085935 A↗ — Ryo Shioda
15 ELEMENTS / 11 GROUPS
f ≈ 82.96 mm (design)
F/1.4 (F/1.46 design)
2ω ≈ 28.12°
1 BIASPHERIC ELEMENT (L15)
Focus MechanismInner focus by single negative meniscus L7 (G2 / LF). L7 translates rigidly toward the image at close focus over a 9.6026 mm throw. Stepping-motor drive (Sigma published spec); BFD held constant.
Optical Elements (15 physical)ElementTypeGlass
L1Positive MeniscusFDS18 catalog equivalent (patent coordinate; production supplier unspecified)
L2Positive MeniscusFCD705 catalog equivalent (patent coordinate; production supplier unspecified)
L3Positive MeniscusFCD705 catalog equivalent (patent coordinate; production supplier unspecified)
L4Positive MeniscusFCD515 catalog equivalent (patent coordinate; production supplier unspecified)
L5Negative MeniscusNBFD25 catalog equivalent (patent coordinate; production supplier unspecified)
L6Positive MeniscusFCD515 catalog equivalent (patent coordinate; production supplier unspecified)
L7Negative MeniscusJ-PSKH4 catalog equivalent (patent coordinate; production supplier unspecified)
L8Negative MeniscusNBFD25 catalog equivalent (patent coordinate; production supplier unspecified)
L9Positive MeniscusFCD515 catalog equivalent (patent coordinate; production supplier unspecified)
L10Biconcave NegativeNBFD25 catalog equivalent (patent coordinate; production supplier unspecified)
L11Biconvex PositiveTAFD55 catalog equivalent (patent coordinate; production supplier unspecified)
L12Biconvex PositiveTAFD65 catalog equivalent (patent coordinate; production supplier unspecified)
L13Biconcave NegativeE-FD15 catalog equivalent (patent coordinate; production supplier unspecified)
L14Biconvex PositiveTAFD55 catalog equivalent (patent coordinate; production supplier unspecified)
L15Biconcave Negative (2× Asph)M-LAF81 catalog equivalent (patent coordinate; production supplier unspecified)

Element	Type	Glass
L1	Positive Meniscus	FDS18 catalog equivalent (patent coordinate; production supplier unspecified)
L2	Positive Meniscus	FCD705 catalog equivalent (patent coordinate; production supplier unspecified)
L3	Positive Meniscus	FCD705 catalog equivalent (patent coordinate; production supplier unspecified)
L4	Positive Meniscus	FCD515 catalog equivalent (patent coordinate; production supplier unspecified)
L5	Negative Meniscus	NBFD25 catalog equivalent (patent coordinate; production supplier unspecified)
L6	Positive Meniscus	FCD515 catalog equivalent (patent coordinate; production supplier unspecified)
L7	Negative Meniscus	J-PSKH4 catalog equivalent (patent coordinate; production supplier unspecified)
L8	Negative Meniscus	NBFD25 catalog equivalent (patent coordinate; production supplier unspecified)
L9	Positive Meniscus	FCD515 catalog equivalent (patent coordinate; production supplier unspecified)
L10	Biconcave Negative	NBFD25 catalog equivalent (patent coordinate; production supplier unspecified)
L11	Biconvex Positive	TAFD55 catalog equivalent (patent coordinate; production supplier unspecified)
L12	Biconvex Positive	TAFD65 catalog equivalent (patent coordinate; production supplier unspecified)
L13	Biconcave Negative	E-FD15 catalog equivalent (patent coordinate; production supplier unspecified)
L14	Biconvex Positive	TAFD55 catalog equivalent (patent coordinate; production supplier unspecified)
L15	Biconcave Negative (2× Asph)	M-LAF81 catalog equivalent (patent coordinate; production supplier unspecified)