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Old Jan 12, 2005, 12:09 PM   #1
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Hi, Advice please.

I have a sigma ef-500 dg super & I am trying to use it as a master on the camera with a Canon 440ex. set to slave.

I don't wish to sound dumb but as they both work independently on the camera (Rebel), I take italthough made by different companiesthey can be used as master & slave.

I have tried setting the Sigma on ch1 same as the 440ex but the 440 does not fire,

The Sigma is attached to the camera by an off shoe adaptor to a flash bracket,.

I don't want to stumble on blindly if these two units will not work together.

I also need to no please do they class the Rebel or D10as an 'A' or 'B' camera when reading the flash instructions.

Thanks in advance.
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Old Jan 12, 2005, 12:34 PM   #2
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What kind of off shoe adaptor to a flash bracket?

Try this setup with the EF500DG Super on the camera first without any cable - Theses two units work together just fine

It could just be an incompatible cable without all the signalings...
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Old Jan 12, 2005, 3:07 PM   #3
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Hi, Thanks they are now working except that the camera mounted Sigma seems to fire twice, there is a pause between each fireing.

Sorry for the hassle but anymore help.

Thanks.
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Old Jan 12, 2005, 3:27 PM   #4
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That's correct!

They should both fire twice: the 1st ones are the preflashes while the 2nd sets are the real McCoy!
- See illustration of the wireless flash timing below: http://www.stevesforums.com/forums/v...m_id=53&page=1



You can also force the 1st firing by pressing the AE * button (ie FEL when the flash is enabled)
-> Then when you hold the AE * button down, the shutter release would just fire ONCE! :|
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Old Jan 14, 2005, 11:50 AM   #5
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Hi, As I said I have got the two flashes to fire when the Sigma is attached to the camera but donot see how to use both together off camera (I did this before with two Minolta flashes & an A1 camera)

Again without sounding a complete idiot I want to place one on either side of an object and both to fire.

It's probably stareing me in the face but I don't see it.

Also in the 1st question I said it was a 440ex should have been 420ex.
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Old Jan 14, 2005, 1:45 PM   #6
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russellsnr2 wrote:
Quote:
Hi, As I said I have got the two flashes to fire when the Sigma is attached to the camera but donot see how to use both together off camera (I did this before with two Minolta flashes & an A1 camera)
The Canon's do not support this mode with the camera 'built-in flash' like Minolta and Nikon does!
(BTW I have the Minolta system too)

You have two options for the camera:
1 - Get an ST-E2 remote controller (which costs the same as a Sigma)
2 - Get another SF500DG Super (or 550EX) and turn its output off (ie their light do not contribute to the lighting).



Quote:
Also in the 1st question I said it was a 440ex should have been 420ex.
I know, I assumed it was since they don't make a 440EX :?
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Old Jan 14, 2005, 1:50 PM   #7
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Hi, Thanks very much NHL for all your help.

Russell.
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