SIGMA 10-20mm f/3.5 EX DC HSM — Optical Cross-Section & Ray Tracing

Home / Lenses / Sigma / SIGMA 10-20mm f/3.5 EX DC HSMSIGMA 10-20mm f/3.5 EX DC HSMJP 2010-243737 A↗, Numerical Example 4 — Noriyuki Ogasawara, Yutaka Kamimura
13 ELEMENTS / 10 GROUPS
DESIGN f = 10.36–19.30 mm
DESIGN F/3.60–3.63
4 ASPHERICAL SURFACES / 4 ELEMENTS
1 SLD / 2 ELD ELEMENTS
Focus MechanismInfinity focus only. The patent prints no close-focus state and does not say which group focuses, so focus movement is not modeled and the focus control leaves the optics unchanged. Sigma's 0.24 m minimum focus distance is listed for reference.
Optical Elements (13 physical; 15 modeled media)ElementTypeGlass
L1Aspheric Negative MeniscusM-LAC130 (HOYA moulding glass, coordinate proxy; patent nd=1.691, νd=53.052; production supplier unspecified)
L2Aspheric Negative MeniscusMC-TAF101-100 (HOYA moulding glass, coordinate equivalent; patent nd=1.769, νd=49.428; production supplier unspecified)
H1Aspherical Resin LayerUnmatched (thin aspherical resin layer; chemistry and supplier unspecified)
L3Negative MeniscusTAF3 (HOYA catalog equivalent; production supplier unspecified)
L4Positive MeniscusE-FD15 (HOYA catalog equivalent; production supplier unspecified)
L5Negative MeniscusTAFD25 (HOYA catalog equivalent; production supplier unspecified)
L6Biconvex PositiveE-FD5 (HOYA catalog equivalent; production supplier unspecified)
L7Biconvex PositiveFCD1 (HOYA catalog equivalent; production supplier unspecified)
L8Biconcave NegativeLAC8 (HOYA catalog equivalent; production supplier unspecified)
L9Positive MeniscusFDS90 (HOYA catalog equivalent; production supplier unspecified)
L10Biconvex PositiveFCD10A (HOYA catalog equivalent; production supplier unspecified)
L11Negative MeniscusTAFD40 (HOYA catalog equivalent; production supplier unspecified)
L12Biconvex PositiveFCD10A (HOYA catalog equivalent; production supplier unspecified)
H2Aspherical Resin LayerUnmatched (thin aspherical resin layer; chemistry and supplier unspecified)
L13Positive MeniscusFC5 (HOYA catalog equivalent; production supplier unspecified)

Element	Type	Glass
L1	Aspheric Negative Meniscus	M-LAC130 (HOYA moulding glass, coordinate proxy; patent nd=1.691, νd=53.052; production supplier unspecified)
L2	Aspheric Negative Meniscus	MC-TAF101-100 (HOYA moulding glass, coordinate equivalent; patent nd=1.769, νd=49.428; production supplier unspecified)
H1	Aspherical Resin Layer	Unmatched (thin aspherical resin layer; chemistry and supplier unspecified)
L3	Negative Meniscus	TAF3 (HOYA catalog equivalent; production supplier unspecified)
L4	Positive Meniscus	E-FD15 (HOYA catalog equivalent; production supplier unspecified)
L5	Negative Meniscus	TAFD25 (HOYA catalog equivalent; production supplier unspecified)
L6	Biconvex Positive	E-FD5 (HOYA catalog equivalent; production supplier unspecified)
L7	Biconvex Positive	FCD1 (HOYA catalog equivalent; production supplier unspecified)
L8	Biconcave Negative	LAC8 (HOYA catalog equivalent; production supplier unspecified)
L9	Positive Meniscus	FDS90 (HOYA catalog equivalent; production supplier unspecified)
L10	Biconvex Positive	FCD10A (HOYA catalog equivalent; production supplier unspecified)
L11	Negative Meniscus	TAFD40 (HOYA catalog equivalent; production supplier unspecified)
L12	Biconvex Positive	FCD10A (HOYA catalog equivalent; production supplier unspecified)
H2	Aspherical Resin Layer	Unmatched (thin aspherical resin layer; chemistry and supplier unspecified)
L13	Positive Meniscus	FC5 (HOYA catalog equivalent; production supplier unspecified)