topic Re: Getting 600EX-RT slave to fire only via Pop-up Flash in Speedlite Flashes

Getting 600EX-RT slave to fire only via Pop-up Flash

Ed_60D — Tue, 14 May 2013 02:47:46 GMT

I have a 600EX-RT set up as slave and contolled by 60D using pop-up flash. I have the 60D settings set for the slave to fire only as per pages 140-141 of the 60D manual. However, in this setting the pop-up flash will still fire. At the end of page 141, it says "Even if you disable the built-in flash from firing, it will still fire to control the slave unit". Is there no way to disable the pop-up from flashing? Otherwise you never really get single off camera flash. Thanks.

Re: Getting 600EX-RT slave to fire only via Pop-up Flash

7D5D — Tue, 14 May 2013 03:04:57 GMT

Is there no way to disable the pop-up from flashing? Otherwise you never really get single off camera flash. Thanks.

Not if you want to trigger an off camera slave because it uses the pop-up flash as the means of triggering the slave.

Yes you do get single off camera flash because even though the pop-up flashes, it is only a pre-flash to trigger the slave. In this configuration the pop-up does not contribute to the actual exposure, this all happens before the shutter opens.

Re: Getting 600EX-RT slave to fire only via Pop-up Flash

Ed_60D — Tue, 14 May 2013 23:09:10 GMT

7D5D

Thanks for pointing that the pop-up flash acts as trigger before the shutter opens. I did a little test and sure enough, the flash from the popup does not affect exposure in the slave only mode.

Cheers,

Ed_60D