As above.
I encountered this problem using a optical slave with my canon flashes.
For the benefit of others, a optical slave unit is a $20-$30 small box unit (about 3cm x 3cm) with a light sensor which u connect to your flash. So when it picks up another flash, it will fire off the flash it is connected to ... supposedly
Ok ... now my problem is ... it only works once. When i put the slave on my 550ex and trigger it off with my built in flash, it only works the first time. Subsequently, it doesn't fire at all. Same problem with the 420ex. Already tried all the possible combination ... M mode, ETTL, Multi ... Only thing i can do after it fires if either switch it off (and on again) or take out the trigger.
Anyone encountered this problem before, or have some information about it ?
p.s. dun tell me to use the 550ex as a master to trigger of my 420ex ... i know that can be done.
I encountered this problem using a optical slave with my canon flashes.
For the benefit of others, a optical slave unit is a $20-$30 small box unit (about 3cm x 3cm) with a light sensor which u connect to your flash. So when it picks up another flash, it will fire off the flash it is connected to ... supposedly
Ok ... now my problem is ... it only works once. When i put the slave on my 550ex and trigger it off with my built in flash, it only works the first time. Subsequently, it doesn't fire at all. Same problem with the 420ex. Already tried all the possible combination ... M mode, ETTL, Multi ... Only thing i can do after it fires if either switch it off (and on again) or take out the trigger.
Anyone encountered this problem before, or have some information about it ?
p.s. dun tell me to use the 550ex as a master to trigger of my 420ex ... i know that can be done.