Quite a while back, some of you (Canon users) were asking me about the suitability of this flash and whether it is worth buying (particularly since it offers so much at such a reasonable price). From what I have read, it does seem to be a pretty capable flash which supports ETTL. Well, at least four months have passed since then and I haven't read any more problems with this flash so it does seem pretty good so far.
My own thoughts on this flash are:
- If you can afford the Canon 550EX and need (or not) the range, get the Canon one for assurance and peace of mind.
- If you can't afford the 550EX and don't need the range, consider the 420EX instead
- If you can't afford the 550EX and need the range, the choice is clear, try the Sigma EF500 Super
Some pockets of conversations regarding this flash have also popped up in several places including the EOS Mailing List, EOS 3 and EOS 1V Yahoo Groups, etc. In a post on the EOS 3 Yahoo groups, one of the guys who bought the Sigma EF500 Super (in addition to his 550EX) offered some further insight to its capabilities which I felt would be useful for those considering this flash for their Canon systems.
On Robgalbraith.com, there is a thread where the poster tested the Sigma EF500 Super alongside with the 550EX and 420EX. Warning.. the tests here by the poster are not scientifically conducted and are for sample reference only.
Also fairly recently, 2 guys on the EOS Mailing list wrote up a brief page outlining how it compares to the Canon 550EX and I felt this would be a good read for those interested.
I will try to update this thread as and when I find new pieces of information on this flash.