Newer Rebel T7 hot shoe center pin

[DedTreeJig]

I just purchased a Rebel T7.  I know the original version did not have the center pin on the hot shoe, however mine does have the center pin.  Does anyone know if the center pin is active?  Would I be able to use a third-party flash with the camera?

[Bellmac]

Thanks for the quick answer Mike.  I am not surprised the TTL system in the Vivatar 6000 macro flash might not provide automatic control with the T7.  But where do you get the 250 volt number, which is often cited (6 volts used to be the cited value).  I cannot find any documentation from Canon.  Do you have an authoritative source?

Assuming 250 volts is the rating, what about peaks and current?  Any sense of the voltage and current peaks from older flash units.  I have some 120VAC studio flashes that I have not even considered yet.

[kvbarkley]

250 is the standoff voltage. When the shoe activates it shorts it, so no over voltage. The contacts are designed to handle the current.

[MikeSowsun]

Canon redesigned the hot shoe circuitry somewhere around 2004 to make it safe up to 250v.

Here is a reference for you:  https://digitaljournalist.org/issue0703/tech-tips.html 

Canon cameras that have a PC sync port have this warning in the user manual:

[Bellmac]

Really appreciate the effort, but honestly the 2007 reference creates more questions than it answers.  It basically says that all EOS Rebel models (which would include my T7/2000D/1500D/KissX90 model) are good for only 6V.  Although I appreciate Canon's desire not to disclose proprietary information, to me this kind of information should fall within the category of "product specification".  Unfortunately neither the user manual nor published specification for the product provide any information, limitations, or warnings on use of third-party flash units other than the possibility of something other than an Ex Speedlite not working.  It says nothing about damage to the camera.

So, as I just said, the 2007 article clearly says that all "EOS Rebel Series" cameras are good for only 6 volts.  Am I reading this incorrectly?

[MikeSowsun]

Yes, you are reading it incorrectly.

Rebel series Digital SLR cameras (350D, 400D, etc) are good to 250v. Only the 300D and “EOS Rebel Series” FILM SLR cameras were 6v. 

[Bellmac]

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@MikeSowsun wrote:

Yes, you are reading it incorrectly.

You really have to decrypt that listing to figure out what is what.  The heading covers both 35mm and digital cameras and I made the assumption that "EOS Rebel Series" included digital cameras.  I suspect that others have done the same, which is where the 6 volt limitation came from for the newer DSLR's.  Thanks again.  So, I think if feel reasonably comfortable trying my old flash units (even if they may not provide maximum functionality).  I was mostly interested in being able to try the 6000AF macro flash.