Very good tool, with my EOS 400D. Sophisticated features that you will take the time to master. For example, the strobe function (several flashes per image) for sports photo or wave effects, rays with a zoom ... Also in sports photo (1 flash per image) for the continuous shooting, the flash keeps pace, delicious. If you still hesitate before your investment, buy the book by Thomas J. Denis Canon flash system to know almost everything about the Speedlite 580EX II and his little brothers. It will not duplicate the manual flash or information supplied to the dropper by Canon on the excellent capabilities of this product. Irreproachable and quick delivery (Premium in my case). I am satisfied. And I wait a bit for the acquisition of two other slave flash units 580EX II or 430EX II ... For now I enjoy control other old flashes NG 32 with a sabot cell. Allow one to two sets of 4 rechargeable batteries in succession one short flash of energy, AA 2100, 2300 or 2700 mA best. They are essential and compact in the tote. The protective case is solid, aesthetic and compact. Put away the flash shoe and there but nothing more - as Delamax diffuser Flash diffuser for Canon Speedlite 580EX II and Sigma EF 530 DG - softbox Flash Bounce example (very useful).
