How do I use this flash as a slave?

This video on youtube explains how to setup and use the 600 RT as a master. I do a lot of shooting with master slave, but my equipment is Nikon. Your gear is an excellent choice making it possible to shoot with remote flash. Canon 600ex rt Step by Step Setup Guide

How to use the internal flash as a commander is in the manual from page 189. The manual is online.
There follow 10 pages about all different settings for the remote flash mode. I could not find how to use the internal flash as a commander and switch of the commander itself. On my Nikon, I can use the light as a commander and when the picture is made the build in flash does not fire.
You always see the internal flash fire, before the picture is made, because it has not only to tell each group what setting it should use, but it also has to trigger the external flash groups. If you want to use the flash as a commander while photographing persons, you can use a Infra Red filter (little one) in from of the internal flash, so the subjects won't close their eyes. Look for the Nikon SG-3IR filter. I think Canon must have filters like this.

• is your settings set to manual ? if you are set to manual mode and the flash does not pop out try pressing the flash button located near the EOS 60d label
• if the flash won't pop out after pressing the button try to follow the steps on this you tube link

How to fix the This menu cannot be displayed External flash is attached...

Caroline, you should try to set the camera on "M" and the flash in 2nd curtain flash sync.

Or set flash in ATG wireless IR ETTL Slave modes and pop-up the flash on Canon EOS-70D.

Truly,
[email protected]

If you restart it immediately, and the unit seems like it is just starting, it may be the charge capacitor is shorting out, or there is excessive gate leakage of the thyristor

Turn off the Pre-flash from the camera /or 580EX 2.

[email protected]

check Custom Functions of Camera and Flash it can be turned off in both locations

Most any slave light will work I use a old vivitar flash with a slave module in the cord to camera outlet woks gook for a fill light. helix camera .com ritz camera. or ebay don't digital flashes a little different than strobes i played with the settings until i got the desired lightng I wanted., if your camera has a hot shoe you can get a slave to fire an external flash with it.hope i helped

I just got the 580 and had trouble with it blinking all the time, the bounce card was out about a mm and I did not realize it, once that was pushed all the way back--voila.

I think this is due to the TLL preflash of the 828 internal flash. Each time it actually fires 2 flashes. First one for metering and second one for actual exposure. First "fake" flash probably trigers your external flash which is too early. Slution... hmm i think there are afordable slave adapters out there which detect the TTL preflash, ignore it and fire the external flash on the right timing along with the main flash. cost.. about few tens $ i think. they can detect also infrared light so you can mount IR filter on your internal flash to prevent interfering with the exposure...