I use one of these as a slave flash. However, I use it with a cheap radio trigger rather than the canon wireless as outside it's more reliable. As as result although I am using it as a slave it actually set as a master on manual and then triggered by the radio.
The prob is at the minute that it goes to sleep after a couple of minutes meaning you take shot, no flash, walk to unit, wake it up, take shot again - pain!
Custom settings allow you to choose a 10 or 60 minute before sleep delay when in slave mode which would be ideal - but it'd not in slave mode!
The other option is to disable power off completely. This would solve it but I then run the risk of leaving it on when finished and it staying on till the batteries go.
Any ideas? And crucially does anyone know what the battery drain is like when on but inactive?
The context is if using for a wedding and leaving on 'permanently' am I going to run into probs during the day? My suspicion is that battery drain is so low that it won't have much bearing on things even if left on but would love someone to confirm....
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