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Respected Contributor
Posts: 1,557
Registered: ‎01-25-2018

Re: t7i & off camera lights?!?

If you have a Canon speedlite or compatible, you can use it to trigger the optical slave built into the strobe.  (I am assuming Alien Bee's have an optical trigger built in that allows them to fire based upon another flash firing and triggering them)

 

Rodger

EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
Esteemed Contributor
Posts: 4,986
Registered: ‎02-17-2016

Re: t7i & off camera lights?!?

Or even the cobra head flash.

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Respected Contributor
Posts: 1,557
Registered: ‎01-25-2018

Re: t7i & off camera lights?!?

[ Edited ]

kv,

 

Can you set the pop up internal T7 flash for manual mode so that it won't always do a pre-flash for the E-TTL system?  That exposure check flash would trigger the slaves before the regular full flash.  With the Speedlites in manual mode, you don't have the problem with the pre-flash triggering the slaves.

 

Rodger

EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
Esteemed Contributor
Posts: 4,986
Registered: ‎02-17-2016

Re: t7i & off camera lights?!?

You can with the T6S. But some flash triggers can ignore the pre-flash.

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