You need it
If you know macro, you know you need serious light. All the people on the Internet that have a problem with the 65 mp-e (boohoo no AF) and this flash (ermahgerd its so harsh) don't know macro. It's a totally different beast. You need this if you're serious about macro. If you wanna take pictures that make the viewer wish they could shrink to the size of a grain of rice to ride on a bee like Falcor from the Neverending Story, get it and a serious macro setup.
February 16, 2013
Big let down
Costly paper weight. Canon did not publish good data as to what lenses it could be used with.
September 20, 2010
Great flash to use for macro work, but I wish that adaptor rings could be made available to use with other lensed especially now that the new macro lens that was just announced.
November 12, 2009
Worth it's weight in gold
Very good product, Would be nice if it would not need a step-down adapter for the 180mm lens. Would also be nice if that adapter would be included either with the lens or the flash unit.
October 24, 2009