SIGMA EF-500 Super Flash as Slave for Canon 550EX?

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Hi,

I'm using a EOS 5 (soon a EOS3) and the Canon Speedlite 550EX. I want to buy two more flashes for a wireless setup. I'm considering about buying a 420EX or the Sigma EF-500 Super. The Canon 420EX would support all features I need (like wirless-E-TLL, setting a ratio between the master and the slaves, ...), but the Sigma EF-500 offers more power for a lower price.

According to Sigma the EF-500 Super supports E-TTL as well as wireless flash photography. Does anybody know if the Sigma wireless-system is compatible to the Canon wireless technology of the EX-System?

thanx, Ralf Bernert.

-- Ralf Bernert (ralfbernert@gmx.de), November 22, 2001

Answers

The Sigma 550EX does everything (except the custom functions) that the 550EX does (and more) and has nearly the same power (less than 0.2 stops difference). It also works as a master in a Canon wireless system just like the 550EX does. The Canon is easier to operate and is built better but the Sigma is half the price. It's even less than the 420EX.

-- Jim Strutz (j.strutz@gci.net), November 23, 2001.

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