Having problems with your Canon EOS 40D Digital Camera ?

I have a Canon EOS 40D camera. We are having problems with using an external flash. The pictures always come out extremely dark with the external flash. The flash seems to work fine, it flashes brightly. The pictures look fine using the built in flash. The flash is a Promaster but we tried a Canon flash and it did the same thing. The camera store we bought the camera and the flash from says it looks like a synchronization issue and that it is a hardware problem with the boot. Their sugges

Answers :

I don't know if this will help and this post is two months old. The \015\012camera store may be right that the synchronization is the issue which \015\012tends me to point a finger at the external flash. There are at least \015\012three different flash units that will flash when the picture is made but\015\012 only one type will sync with the camera. A digital flash unit is \015\012different from a film flash so a Canon EX type is required to sync with \015\012Canon TTL or TTL II digital cameras. An EZ will flash but it's off a \015\012bit, so I can only assume that your Promaster and Canon flash units are \015\012for film cameras. Okay and another thing that could be throwing things \015\012off a bit is the camera may have been programed in Custom Functions to \015\012use "Second Curtain" or "Rear Curtain". Just seams to me if the built in\015\012 flash works then it's the external units at fault.
Repair Help & Product Troubleshooting for Canon EOS 40D Digital Camera

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I have a Canon EOS 40D camera. We are having problems with using an external flash. The pictures always come out extremely dark with the external flash. The flash seems to work fine, it flashes brightly. The pictures look fine using the built in flash. The flash is a Promaster but we tried a Canon flash and it did the same thing. The camera store we bought the camera and the flash from says it looks like a synchronization issue and that it is a hardware problem with the boot. Their sugges

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