Third Party Speedlites For Canon EOS: Sigma Electronic Flashes

	Zoom¹ (mm)	Zoom Type	Guide No.¹ (m)	Auto Metering²	Fill Flash	AF Beam (m)	Manual Features³	HSS⁴	RPT (Hz)	Flash Duration (s)	Reload⁵ (s) Standard \| Rapid Fire		Head Movement (°) vert. \| horiz.		Master⁶	Slave⁶	Groups/Ch.	Size (mm)	Weight (g)	Powered by	Production	Comments	Tests/Reviews
Sigma EF-430 ST EO	(18*) 28 - 80	motorized	(21) 30 - 43	TTL	no	yes	2CS, M (≥1/16), FEC (±2); Z	No	1 - 10	1/30000 - 1/100	≤4/6		0 - 90		no	no (S1/S2 ?)		115.5 x 107 x 75.5	280	4x AA	1997	*the wide panel is optional; with EOS 700, 750 and 850 only full TTL auto mode is available (no manual, Tv, Av etc.)
Sigma EF-500 ST EO	(17) 28 - 105	motorized	(20) 30 - 50	TTL	no	yes	M (≥1/16)	No		1/700	≤4/6		yes	yes	no	no		139 x 117 x 77	320	4x AA	2001
Sigma EF-500 DG ST EO-ETTL	(17) 28 - 105	motorized	(20) 30 - 50	E-TTL	no	0.7 - 9	M (≥1/16)	No		1/700	≤4/6		-7 - 90	-180 - 90	no	no		139 x 117 x 77	320	4x AA	2002	incompatibilities with EOS 50D (and 5D Mk II?) - no update available; the "DG" in the model's name foresides of the flash is printed in white letters like the rest
Sigma EF-500 DG ST EO-ETTLII [F15]	(17) 28 - 105	motorized	(20) 30 - 50	E-TTL	no	yes		No		1/700	≤4/6		yes	yes	no	no		139 x 117 x 77	320	4x AA		incompatibilities with EOS 50D reported by Sigma Service (also with EOS 5D Mk II?), update available; the "DG" in the model's name foresides of the flash is printed in gold letters, the rest in white
Sigma EF-530 DG ST EO-ETTLII [529/F16]	(17) 24 - 105	motorized	(20) 28 - 53	E-TTL	no	0.7 - 9	M (≥1/16)	No		1/700	≤4/6		-7 - 90	-180 - 90	no	no		139 x 117 x 77	305	4x AA	2007	incompatibilities of the series up to SN 1045700 with EOS 50D reported by Sigma Service, update available
Sigma EF-610 DG ST EO-ETTLII [743/F19]	(17) 24 - 105	motorized	(23) 34 - 61	E-TTL	no	0.7 - 9	M (≥1/16)	No			≤4/6		-7 - 90	-180 - 90	no	no		139 x 117 x 77	320	4x AA	2010	with EOS 700, 750 and 850 only full TTL auto mode is available (no manual, Tv, Av etc.)
Sigma EF-430 Super EO	(18) 28 - 80	motorized	(21) 30 - 43	E-TTL	no	yes									no	S1/S2				4x AA
Sigma EF-500 Super EO [F08]	(17) 28 - 105	motorized	() - 50	TTL	no	0.7 - 9	M (≥1/64)	yes	1 - 100	1/700	≤4/6		-7 - 90	-180 - 90	yes*	S1/S2/*		139 x 117 x 77	335	4x AA	2001	this is taken from the Minolta version: there is no real remote TTL or master flash feature, instead you put the flash on the camera for measurements, then unmount it to put it into position and remote release it by the built-in camera flash or another Speedlite mounted to the camera - there is no real remote TTL or whatsoever; *compatible with EF-430 ST/Super as slaves only (?)
Sigma EF-500 DG Super EO-ETTL [F10]	(17) 28 - 105	motorized	(20) 30 - 50	E-TTL	no	0.7 - 9	2CS, M (≥1/128), FEC (±3), Z	yes	1 - 199	1/700	≤4/6		-7 - 90	-180 - 90	yes	yes	3grp, 4ch	139 x 117 x 77	335	4x AA	2002	incompatibilities with EOS 50D (and 5D Mk II?) - no update available
Sigma EF-500 DG Super EO-ETTLII [F14]	(17) 28 - 105	motorized	(20) 30 - 50	E-TTL	no	(Center AF)	2CS, M (≥1/128), FEC, Z	yes					yes	yes	yes	yes		139 x 117 x 77	335	4x AA		incompatibilities with EOS 50D reported by Sigma Service (also with EOS 5D Mk II?), update available	Photonotes EF-500 DGS vs. SL 550EX
Sigma EF-530 DG Super EO-ETTLII [525/F17]	(17) 24 - 105	motorized	(20) 28 - 53	E-TTL	no	0.7 - 9	2CS, M (≥1/128), FEC (±3), Z	yes	1 - 199	1/700	≤4/6		-7 - 90	-180 - 90	yes	yes	3grp, 4ch	139 x 117 x 77	335	4x AA	2007	incompatibilities of the series up to SN 1047200 with EOS 50D reported by Sigma Service, update available
Sigma EF-610 DG Super EO-ETTLII [738/F18]	(17) 24 - 105	motorized	(23) 34 - 61	E-TTL	no	0.7 - 9	2CS, M (≥1/128), FEC (±3), Z	yes	1 - 199	1/700	≤4/6		-7 - 90	-180 - 90	yes	yes	3grp, 4ch	139 x 117 x 77	330	4x AA	2010	features wireless TTL and modeling flash
Sigma EF-630 EO-ETTLII [932/F50]	(17) 24 - 200	motorized	(21) 29.5 - 63	E-TTL	no	0.7 - 10	2CS, M (≥1/128), FEC, Z	yes				yes	-7 - 90	-180 - 180	yes	yes		148.4 x 121.5 x 79.4	490	4x AA	2017	features wireless TTL and modeling flash

Ring Flashes			Amazon		Zoom (mm)	Zoom Type	Guide No. (m)	Auto Metering²	Fill Flash	AF Beam (m)	Manual Features³	HSS⁴	RPT (Hz)	Flash Duration (s)	Reload⁵ (s) Standard \| Rapid Fire		Head Movement (°) vert. \| horiz.		Master⁶	Slave⁶	Groups/Ch.	Ratio	Trigger Input	Size (mm)	Weight (g)	Powered by	Production	Comments	Tests/Reviews
	Sigma EM-140 DG EO [F30]				80°	none	14	E-TTL	no	yes (20sec)	2CS, M (≥1/64), FEC (±3)	yes	1 - 199		≤4/6		-/-	-/-	yes	no	2grp+all, 4ch	supported		see comments	430	4x AA	2005	incompatibilities up to SN 2054400 with EOS 50D reported by Sigma Service, update available; size of control unit: 136 x 83 x 77, size of flash ring: 129 x 127 x 31; compatible with filter sizes 55 - 62, 72 & 77

Accessories			Amazon		Function/Details	Weight (g)	Powered by	Production	Comments	Tests/Reviews
	Sigma Flash USB Dock				unit was first mentioned in the EF-630's announcement - is used like the existing USB Dock for lenses to update firmware via Sigma Optimization Pro; the dock will be sold separately; no further information available			ann. in 2016

General Notes:
1.)	Sigma's Remote capable flashes are compatible with Canon's classic wireless TTL system (sometimes reported buggy though).
2.)	Also see pending entries. Additions are welcome.

Online Resources:
	Sigma Global Vision Sigma Foto Germany Sigma Photo USA Sigma Photo Japan Sigma Imaging UK
Catalogs & Manuals
	Sigma Imaging UK Sigma Foto Germany Sigma Global (lenses only) Sigma Photo USA (lenses only) Discontinued Lenses (current) Discontinued Lenses (via archive.org)
Press Releases
	Sigma Global Sigma Foto Germany Sigma Photo USA