Question about Sigma EF-500 Super for Canon TTL Flash

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Hello there. It seems that the Sigma EF-500

Hello there. It seems that the Sigma EF-500 Super Flashgun has the E-TTL functionality for Canon SLRs. I bought it for use on a EOS100 film camera and it seemed to work well, but won't fire while fitted to my EOS7D. Can a EF-500 be used on a Canon EOS7D? Regards John

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  • b_mused Dec 02, 2010

    Hello Tri3mast

    Thanks for the reply.

    Yes, the EOS7D has built in features to wirelessly control remote external flashguns. This Sigma unit works quite well as a wireless slave.

    I have used it in tandem with the 420EX, both off the camera, and the 7D will trigger them quite well. The next trick is to fine tune the settings for consistent exposures, as I sometimes get a "white wash" from the flash.


    Regards
    B-mused

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John, there is a difference in sync times between film and digital flash. It's taken the third party manufactures a little time to catch up so there is a lot of "film" flash units out there. I'm understanding that the Sigma flash doesn't fire at all which is pretty amazing I would have thought it would fire just not at the correct time. This flash isn't a total loss because it can be used wireless with a slave unit for fill or even a main light triggered from a mini transmitter on the camera hot shoe. Here is a link to an e-Bay auction to see what I'm saying.
http://cgi.ebay.ca/Wireless-Flash-Trigger-Transmitter-Receiver-4-Canon-/230537528202?pt=Camera_Flash_Accessories&hash=item35ad1b838a

I use this type of system for a location shoot, there are no wires and I can set up and balance my lighting to each set with no more dark backgrounds hope this was a help

Posted on Dec 01, 2010

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Posted on Jan 02, 2017

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look up sigma's website and find the contact info
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every time i have ordered parts they try and get me to send it in for repair even though by the time i am ordering the parts the flashgun is already in bits & i tell them this they keep telling me how dificult it is to do...

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