canon 580EXII speedlite out of control

Started Jan 18, 2013 | Questions thread
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RS_RS Senior Member • Posts: 1,773
Re: canon 580EXII speedlite out of control

jbphto wrote:

Trying to figure out why my flash gives out a large stroboscopic flash while i'm shooting. ... Am I pressing something on the 5Dmrk3 that trigers this? It used to happen on my 1dsmrk2 as well.

You are probably pressing the DoF button (maybe accidentally), which by default produces a lengthy burst of "modelling flash". You can switch this behaviour off by a CF on the flash.

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