I received a Sigma camera flash for Christmas. I had asked for the Canon flash recommended by my camera manufacturer. My dad ordered the Canon from accessorycircut.com as it offered a low price. He received a phone call the next day and was told the flash was on back-order for 3-5 weeks. The salesman told my dad that he had a Sigma flash of superior quality for about the same price (actually $80 more). My dad ordered the Sigma instead. I received the gift on Dec. 27 and immediately called Canon to check the Sigma flash's compatibility... read full review »