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09-04-2009, 01:02 AM   #1
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Sigma EF-500 DG super for Nikon on a Pentax K100D?

I've got a Sigma EF-500 DG super for Nikon and was wondering if there would be any problems if I used it on my K100D

I've looked around the forums and found some useful information regarding Nikon flash units, and they seem to work without any problems. I just wanted to make sure that it wont fry my camera with using the EF-500 even though its made for Nikon.

I tested the flash with a multi meter and it puts out just under 5 volts


Last edited by Nathan-vD; 09-04-2009 at 03:21 AM.
09-04-2009, 02:10 AM   #2
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It won't fry your camera, but you'll have to use it in manual mode.
09-04-2009, 07:11 AM   #3
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Just as a precaution, you should tape insulate the extra contacts with the exception of the large centre trigger contact.
Nikon and Pentax contact pattern are similar but the signal sent through each point is different.
09-04-2009, 04:11 PM   #4
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QuoteOriginally posted by Nathan-vD Quote
I've got a Sigma EF-500 DG super for Nikon and was wondering if there would be any problems if I used it on my K100D
Not a a problem. The only limitation is that the Sigma flash will fire at full power. You'll need to adjust the camera's ISO and aperture setting depending on the distance to the subject.

QuoteOriginally posted by Nathan-vD Quote
I've looked around the forums and found some useful information regarding Nikon flash units, and they seem to work without any problems. I just wanted to make sure that it wont fry my camera with using the EF-500 even though its made for Nikon.
It won't fry your camera. You don't even need to mask the "extra" contact pins. The ones for Pentax are at different locations from those for Nikon.

But most Nikon flash units in discussion have their own light sensor and thus can be used in auto mode. This is one of the reasons why I advocate buying flash with its own sensor. You can use them in auto mode with cameras of different brands.

09-04-2009, 07:18 PM   #5
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Thanks for your help i really appreciate it
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