Power is still the same as 580EX if u're talking abt guide number. In addition, the 580EX II has a sensor at the front and overall built quality is better and feels a little larger.
Power is still the same as 580EX if u're talking abt guide number. In addition, the 580EX II has a sensor at the front and overall built quality is better and feels a little larger.
Ex II is very silent to the point you only hear the click of the relay. Older model got this whizz which you can roughly deduce the amount of power used.
Whichever fits your budget. Both flashes are quite close in performance, with minor differences that you probably can live without - I can. I'm on the older 580EX and see no need for an upgrade as yet.