Hello,

I'm upgrading my system and trying to get to the bottom of flash triggers. I will be pairing an AOI UH-A7CII housing with Backscatter Atom flashes. The atom listing says they accept Sony TTL signals, and the AOI housing manual under "Flash control" directly states "Sony TTL (Auto HHS)." So I asked AI if I needed the backscatter trigger for TTL, and it said yes. Then I asked Backscatter, and they said no. Then I asked Backscatter if the AI was wrong and they said actually no, their mistake, I would in fact need the Backscatter trigger. I'm just trying to understand why the housing would state Sony TTL is supported, and the flash would say it supports Sony TTL, but those two things wouldn't be able to talk to each other. Maybe it's a case of no good information existing publicly for some newer products, but I'd love to be able to save $500 and the added bulk of the BS trigger if it's not needed. Does anyone have a similar system that can confirm one way or the other?

From what i can see, the AOI housing is custom made to fit only the AOI HSC-03 trigger that is supplied with the housing.

You can see the very tight fit here, leaving no space for any other trigger.

Other thing is that the housing has custom pins that connect the trigger to the LED's baked in the housing. And these you dont find in any other trigger.

But AOI does say that it supports Sony TTL, so i think it should work. And Backscatter strobes are made by AOI.

Thanks for the response. UWCameraStore also explicitly states that it works with "Sony TTL (HSS)" and maybe more importantly the backscatter HF-1 which uses the same protocol as the atom and MF-3.. So I'm inclined to believe it does in fact work without the added trigger. Frustrating that backscatter support wasn't more helpful and specific in answering the question. They probably spent more time emailing me an unsolicited sales invoice for something I was always going to buy from the web store, than they did researching the issue.