JJC External battery pack / FB 1 similar Canon CP-4E for Canon Speedlite 580 EX / EX II, 540 EZ, 550 EX MR 14 EX MT 24 EX (Accessories)
I had bought the device because it was always annoying when my flash (Canon Speedlite 580EX II) takes too long to follow suit, mainly for portraits and reportage, sometimes a second results later an even better reason, but then: too dark ! - Even wit
