I need advise, for Wireless Flash Photography with 550EX�.

[saso_cvetkovski]

I need advise, for Wireless Flash Photography with 550EX�.

 

I have problem with turning the Master Flash 550EX OFF.

I reed the Canon Instruction for speedlite 550EX and follow the steps

but with no success. Always the master unit fire with the slaves

units

 

Canon Instruction Page 57:

Master Flash ON / OFF This setting ( Master Flash OFF ) prevents the

master unit from firing a flash . It can still transmit wireless

signals to trigger the slave units.

Can somebody help me with advise where can be the problem

(I use canon eos 1V in E-TTL mode with 1master and 2 slaves all 550EX)

[steve_dunn2]

<p>The communication with the slave units happens via light, so even with the flash set not to flash, it still emits some light (enough for communication - shouldn't be enough to affect the actual lighting). Are you sure that's not what you're seeing?</p>

[bob_keen1]

Steve,

Unlike the RC transmitter, the 550 uses an optical pulse. I had the same question. What you're seeing is this communication and it actually goes off before the shutter is open, just like the preflash works. This is my understanding.