580ex II + 60D, both flashes firing (wireless speedlite)

In the options in camera i selected the speedlite only to fire (pic of a speedlite) and for some reason my on camera flash still fires everytime along with the speedlite.

Am I missing an option somewhere?

The 60d controls the remote flash with the popup flash. It has to fire to make this work. It fires control flashes before the shutter opens.

dedsen wrote in post #13598190
The 60d controls the remote flash with the popup flash. It has to fire to make this work. It fires control flashes before the shutter opens.

Doh!
Thanks for the quick reply. I will slink back into my corner slowly...

Do not feel bad. This same issue comes up at least once a week.

dedsen wrote in post #13598237
Do not feel bad. This same issue comes up at least once a week.

Ok now I feel worse

The pop up still contributes to the exposure. I can't seem to completely prevent it unless I stop WAY down.

idsurfer wrote in post #13600022
The pop up still contributes to the exposure. I can't seem to completely prevent it unless I stop WAY down.

That's normal and the way it's supposed to be done.

It's on the manual. RTFM!

Who has time to read the manual? You can control how much the popup, down to zero, contributes to the exposure. There is a menu setting for that.

If you have turned off the flash function on the 60D, so you see the icon where only the slave is firing, then the pop up flash is not adding to the exposure. Its just a pre flash for the slaves.

If you tape a little strip of exposed color film over the pop-up flash, the only light that will go through is infrared. I cheated the system!
(I also use a 60d)

Viva-photography wrote in post #13612162
If you tape a little strip of exposed color film over the pop-up flash, the only light that will go through is infrared. I cheated the system!
(I also use a 60d)

You're also defeating the purpose of the pre-flash.

I am not sure how you figure this. The STE2 has an IR filter over it's flash tube and it works just fine.
All of this extra light talk is mute unless you are very close to the subject anyway.

dedsen wrote in post #13612208
I am not sure how you figure this. The STE2 has an IR filter over it's flash tube and it works just fine.
All of this extra light talk is mute unless you are very close to the subject anyway.

The pre-flash is used to meter the frame, therefore its telling the TTL flashes how much power they need to output.

The ST-E2 and built-in triggers both fire pre-flashes, but their designs are different. By taping/covering the 60D flash, you're not only interfering with its design, you risk damaging the flash (think heat build up). If you don't want a pre-flash, use the off camera flashes in manual mode.

If you have set the option for the popup not to contribute to the exposure, it is only sending commands to the remote flashes. Only the remote flashes issue preflashes to be measured. Why would you need to measure a preflash that is not going to be used in the actual exposure?