Can the 420EX flash be a slave to the camera?

[cramski]

I am wondering if the 420EX flash can be a slave the 20D that does not have a 550 or 580 flash? I have a friend who has taken some amazing shots of some humming birds with a Nikon set-up. His flash is triggered by his cameras flash. Can it be done on the 20D and 420EX?

Thanks!

[tim]

No. AFAIK you need a wireless master like the 550 or 580 to use the 420 as a slave. I think there are flashes that can be triggered by another flash, but the problem with them is the preflash can set them off.

[cramski]

Thank you, thats what I needed to know.:)

[slejhamer]

you need a wireless master like the 550 or 580


Or the Canon ST-E2 transmitter.

Which I think is being upgraded? Sometime soon? Not sure ... Canon's been talking about it for a while. Useful device, but for the price you may get more mileage out of a 550.