ring flash gives a very flat light. but it is supposed to be good for stamps, documents, teeth
etc. Many people prefer the nikon r1c1 style thingy with two flashes on the sides (I think there is a canon equiv.?). if you are in US promaster do a cheaper version that is sort of half way between the two, but I am not sure how well it works (I stopped looking at them when they didn't answer me emails as to whether the pentax version actually works
oh if you shoot pentax, there isn't any on the market (at all
