Third Party Flashes For Canon EOS: Sigma Electronic Flashes - Canon EOS Technoclopedia

Hot Shoe Speedlites
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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. Ratio Trigger Input 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 0.2 - 4/6   0 - 90   no no       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                               4x AA      
  Sigma EF-500 Super EO                                                   2001    
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 [F50]       (17) 24 - 200 motorized () E-TTL no yes 2CS, M (≥1/128) yes       yes -7 - 90 -180 - 180 yes yes       148.4 x 79.4 x 121.5 490 4x AA ann. in 2016 features wireless TTL and modeling flash  

Ring Flashes
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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
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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    

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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.