Question about Canon Speedlite 550EX TTL Flash

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550ex PC sync socket conversions

Where in the UK can I get my four 550ex's converted by having PC sync sockets installed?

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Re: 550ex PC sync socket conversions

Merry Christmas Nigel and all,

Just make sure that the Trigger Voltage is under 7VDC on that adapter. Most likely it is because you're using a Canons.

If your are using them(580s) inside a those softboxes, you can use any flashes. They are lot cheaper than 550 or 580.

Posted on Dec 22, 2007

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Re: 550ex PC sync socket conversions

I do medical/photo equipment repairs & IR conversion, but I'm in the USA.
Over 20 years and Canon knew about that problem including many photographers. Most of Canon flashes can not do manual or aperture mode because they have to flash sensor.
Now they have it on the 580EXII. I guess Canon has no photographer working in the flash department.

Canon screwed photographers, buy a Metz, Vivitar, Sigma, Sunpak, or NIkon.


Posted on Dec 21, 2007

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Any automatic TTL features will still not work however atleast you will be able too fire in auto, and manual modes.

I simply opened the flash by taking off the hotshoe, and then swiveling the flash head 90 degrees to expose the four screws there. You need only remove the two screws from the front side of the unit.

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