t7i & off camera lights?!?

[arobertsonphoto]

Hey Hey! 

We have a t7i we are trying to use for a photobooth.  We're attempting to connect it to an AlienBee strobe with, with a hotshoe adapter and a cord. However, no matter what adapter or cord we use, the camera WILL NOT trigger the flash. 

The menu system shows this (below) when the hotshoe adapter is attached, AND when there is nothing attached. 

When I attach a flashpoint speedlight to the camera, it has no issues. I can access the menu, the flash fires, all is well. 

Please help! 

[wq9nsc]

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

[kvbarkley]

Or even the cobra head flash.

[wq9nsc]

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

[kvbarkley]

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