topic t7i & off camera lights?!? in EOS DSLR & Mirrorless Cameras

t7i & off camera lights?!?

arobertsonphoto — Tue, 27 Jul 2021 17:27:44 GMT

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!

Re: t7i & off camera lights?!?

kvbarkley — Tue, 27 Jul 2021 17:42:26 GMT

Does your T7i have the center flash contact?

What does AlienBee say?

Re: t7i & off camera lights?!?

arobertsonphoto — Tue, 27 Jul 2021 17:48:11 GMT

I'm not sure what you mean by center contact, but here's a photo!

We haven't reached out to AlienBee, that didn't occur to me.

Re: t7i & off camera lights?!?

kvbarkley — Tue, 27 Jul 2021 17:59:16 GMT

You don't have a center contact. You require an E-TTL flash that talks to the camera via the other 4 pins.

Re: t7i & off camera lights?!?

arobertsonphoto — Tue, 27 Jul 2021 18:05:08 GMT

**facepalm** that makes sense. Do you have any reccomendations for a hot shoe adapter that will work?

Re: t7i & off camera lights?!?

kvbarkley — Tue, 27 Jul 2021 18:27:53 GMT

No, I just use Canon Equipment. And, my T6S has the center contact. 8^)

Re: t7i & off camera lights?!?

FloridaDrafter — Tue, 27 Jul 2021 19:03:19 GMT

@arobertsonphoto wrote:
I'm not sure what you mean by center contact, but here's a photo!
We haven't reached out to AlienBee, that didn't occur to me.

FWIW, that doesn't look like a T7i. The T7i has a center post, the T7 doesn't.

Re: t7i & off camera lights?!?

Waddizzle — Tue, 27 Jul 2021 21:47:06 GMT

@arobertsonphoto wrote:
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!

The camera in the above image seems to be a T7. It is definitely not a Rebel T7i. Note the button in lower right corner.

Re: t7i & off camera lights?!?

kvbarkley — Tue, 27 Jul 2021 23:25:48 GMT

I just took him at his word. 8^)

Re: t7i & off camera lights?!?

arobertsonphoto — Tue, 27 Jul 2021 23:44:00 GMT

I'm a she 😞

Re: t7i & off camera lights?!?

wq9nsc — Wed, 28 Jul 2021 02:04:18 GMT

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

Re: t7i & off camera lights?!?

kvbarkley — Wed, 28 Jul 2021 02:23:25 GMT

Or even the cobra head flash.

Re: t7i & off camera lights?!?

wq9nsc — Wed, 28 Jul 2021 02:44:39 GMT

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

Re: t7i & off camera lights?!?

kvbarkley — Wed, 28 Jul 2021 13:00:35 GMT

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