Sigma EF-530 DG ST

Check availablity: eBay.

This flash gives slightly more bang for the buck than the manufacturer's own flash with roughly the same power output. However, the build is less solid, some users report erratic exposure control, the manual mode is crippled, and the user interface is less intuitive.

Canon-version triggered via system-specific pins. Can not be fired from centre contact of the hot shoe.

Units with serial number lower than 1045700 is compatible with Canon DSLRs manufactured before 2008, but is not compatible with the Canon EOS 50D and later models. See this notice to customers using Sigma's EO-ETTL II type flashguns for details.


For dedicated flash systems: Canon, FourThirds, Nikon, Pentax, Sigma, Sony.
Head: 17, 24-105mm coverage, power zoom (tracks lens).
Swivel & tilt: -90° to +180° swivel, -7° to +90° tilt.
Exposure modes: TTL, Varipower.
Manual settings: 1/1 and 1/16 (2 steps).
No built-in wireless modes.
Trigger voltage: <6 volt.
Batteries: 4xAA.
Flash duration: 1/700 sec. @ 1/1 (full output).
Field upgradable: No.
Dimensions: 77 x 139 x 117 mm, 320 g.

Zoom head setting:f=35mmf=50mmf=max
Guidenumber (ISO 100, meter):314053
GNs taken from manufacturer's specifications.

Price: USD 150 (new, w/o tax).
Discontinued: Yes, replaced by: Sigma EF-610 DG ST.

For a detailed explanation of the above specifications, see the guide.


No literature yet.

Brand profile

Key info

Established: 1961
HQ: Kanagawa, Japan
Web: Global, EU, US, man
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Sigma is a family owned manufacturer of photographic equipment founded in 1961 in Japan. The company's main business is to manufacture third party lenses. However they also produce third party flash units and, since 2002, their own line of DSLR and compact cameras. Sigma's digital cameras use a special sensor, developed by Foveon, that records full color information for every pixel. In late 2008 Sigma acquired Foveon.

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