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Old Jan 29, 2005, 6:26 AM   #1
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Will using an external powerpack help improve the flash recycle times of the 580ex and 420ex ? If so, which powerpacks do you suggest? The Canon ones or a 3rd party? ADive much appreciated. THnaks
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Old Jan 29, 2005, 10:42 AM   #2
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substantially. depending on you distance to subject. at full output manual it takes about 1.75s to recycle with a 40w DCB and DCBZ580 cable.


depending on iso and distance to subject in auto again the output and recycle will be variable

example: eos1d mk2 with above mentioned system at iso 400 approx 15 ft from the subject (32) images at 8fps within a 1/3 stop (in a controlled environment) and the pilot light will not go out . ambiant light will also play a large factor in that too.

warning: the use of a system like this if overdone can/will reduce the lifespan of your strobe and high rate/high powercontinous output can under certain conditions cause physical damage to the strobe head or capsdue to overheat.

the output of a external batt to your strobe thru the HV input is 320-330 vdc

i don't believe the 420ex has a HV input so that lets that one out.


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Old Jan 29, 2005, 8:08 PM   #3
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Thank you ..most helpful
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