Having problems with your Canon EOS 40D Digital Camera ?

Remote Firing of Flash Units

\015 I am trying to fire some remote flash units with my 40D however I cant fire them with the main camera flash or my Speedlight off..? Is it possible in settings to manage this on the camera..or do I need to use the remote cable that is supplied with the flash units..? Hope this makes sense...thanks Paul\015

Answers :

The EOS 40D does not have a transmitter built in. The remote flash units must be set to "Slave" and the on-camera external flash unit (eg Speedlite 580EX) or transmitter (ST-E2) set to "Master". Note that the Speedlite 430EX doesn't have the function to act as Master and you need a minimum or the 580EX or a ST-E2 speedlite transmitter (or similar) as Master/s.
Repair Help & Product Troubleshooting for Canon EOS 40D Digital Camera

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Remote Firing of Flash Units


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