SIGMA 105mm f/2.8 DG DN MACRO | Art — Optical Cross-Section & Ray Tracing

Home / Lenses / Sigma / SIGMA 105mm f/2.8 DG DN MACRO | ArtSIGMA 105mm f/2.8 DG DN MACRO | ArtJP 2021-148808 A↗ — Yuki Ueda
17 ELEMENTS / 12 GROUPS
DESIGN f = 103.48 mm
DESIGN F/2.90
2ω = 23.28°
ALL SPHERICAL
Focus MechanismPublished infinity, −0.5× and −1× states. G1/G3 fixed; G2 and the stop move toward the object at different rates: G2 by 21.05 mm at −0.5× and 40.57 mm at −1×, the stop by 12.20 and 23.50 mm (derived from the published gaps). Intermediate gaps are linear visualization interpolation, not production cam data. Native closest object-to-image distance 296.9112 mm; commercial MFD 295 mm is not substituted. Fixed-iris diagnostic visualization (FIXED_IRIS_DIAGNOSTIC_V1): physical iris 9.611937886 mm retained; semi-diameters are figure-based estimates. Patent close-focus F4.32/F5.73 are not reproduced; admitted modeled cones are approximately F4.014/F5.226. Close-focus exposure, illumination and full-pupil fidelity are not verified. Current app aperture readouts and diagram fan sampling remain approximate.
Optical Elements (17 physical)ElementTypeGlass
L1Negative MeniscusE-CF6 (HOYA coordinate equivalent; supplier unconfirmed)
L2Biconvex PositiveTAF3D (HOYA coordinate equivalent; supplier unconfirmed)
L3Biconvex PositiveTAFD65 (HOYA coordinate equivalent; supplier unconfirmed)
L4Biconvex PositiveFCD515 (HOYA coordinate equivalent; supplier unconfirmed)
L5Biconcave NegativeNBFD25 (HOYA coordinate equivalent; supplier unconfirmed)
L6Positive MeniscusTAC8 (HOYA coordinate equivalent; supplier unconfirmed)
L7Biconcave NegativeNBFD29 (HOYA coordinate equivalent; supplier unconfirmed)
L8Biconvex PositiveTAFD5G (HOYA coordinate equivalent; supplier unconfirmed)
L9Biconcave NegativeNBFD29 (HOYA coordinate equivalent; supplier unconfirmed)
L10Biconvex PositiveE-FDS1-W (HOYA coordinate equivalent; supplier unconfirmed)
L11Negative MeniscusFDS90-SG (HOYA coordinate equivalent; supplier unconfirmed)
L12Positive MeniscusE-FEL1 (HOYA coordinate equivalent; supplier unconfirmed)
L13Biconvex PositiveTAFD32 (HOYA coordinate equivalent; supplier unconfirmed)
L14Negative MeniscusBACD16 (HOYA coordinate equivalent; supplier unconfirmed)
L15Positive MeniscusTAFD35 (HOYA coordinate equivalent; supplier unconfirmed)
L16Biconcave NegativeFCD705 (HOYA coordinate equivalent; supplier unconfirmed)
L17Biconvex PositiveBSC7 (HOYA coordinate equivalent; supplier unconfirmed)

Element	Type	Glass
L1	Negative Meniscus	E-CF6 (HOYA coordinate equivalent; supplier unconfirmed)
L2	Biconvex Positive	TAF3D (HOYA coordinate equivalent; supplier unconfirmed)
L3	Biconvex Positive	TAFD65 (HOYA coordinate equivalent; supplier unconfirmed)
L4	Biconvex Positive	FCD515 (HOYA coordinate equivalent; supplier unconfirmed)
L5	Biconcave Negative	NBFD25 (HOYA coordinate equivalent; supplier unconfirmed)
L6	Positive Meniscus	TAC8 (HOYA coordinate equivalent; supplier unconfirmed)
L7	Biconcave Negative	NBFD29 (HOYA coordinate equivalent; supplier unconfirmed)
L8	Biconvex Positive	TAFD5G (HOYA coordinate equivalent; supplier unconfirmed)
L9	Biconcave Negative	NBFD29 (HOYA coordinate equivalent; supplier unconfirmed)
L10	Biconvex Positive	E-FDS1-W (HOYA coordinate equivalent; supplier unconfirmed)
L11	Negative Meniscus	FDS90-SG (HOYA coordinate equivalent; supplier unconfirmed)
L12	Positive Meniscus	E-FEL1 (HOYA coordinate equivalent; supplier unconfirmed)
L13	Biconvex Positive	TAFD32 (HOYA coordinate equivalent; supplier unconfirmed)
L14	Negative Meniscus	BACD16 (HOYA coordinate equivalent; supplier unconfirmed)
L15	Positive Meniscus	TAFD35 (HOYA coordinate equivalent; supplier unconfirmed)
L16	Biconcave Negative	FCD705 (HOYA coordinate equivalent; supplier unconfirmed)
L17	Biconvex Positive	BSC7 (HOYA coordinate equivalent; supplier unconfirmed)