What do you want to take pictures of because ring flashes are not always the best option?[/QUOTE
mainly my caterpillars , moths ,butterflies and sometimes as a extra light source
andy
A friend of mine purchased one, an led ring flash... and it was useless, a torch was better.... Save your money



The reason I ask is some subjects don't like a ring flash shoved in their face, i had the Sigma unit mentioned above, didnt use it all that much although it was a great unit.
A few ideas here of alternatives
http://orionmystery.blogspot.com/2010/12/more-macro-rigs.html
I am not serious about macro so i use a small on-camera flash or the built in one if the camera is so equipped.
Some none ring flash results
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Dark Green Fritillary by andy 759, on Flickr
Poplar Hawk by andy 759, on Flickr
Buff Tip by andy 759, on Flickr
lime hawk moth by andy 759, on Flickr