Last week i stumbled at one of the shops in Vivo City selling a Canon Speedlite 270EX for S$108, thinking this could be a good bargain and give it as a gift to my beginner colleague who is using a 550D. I asked the Gentleman there and told me that 270EX is only for G12. and could not be use for the 550D. I tried to research online, but found no such specialty . is there such? thanks in advance.