Question about 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 suggestion is to send it off to Canon to get it fixed. Before I did that, I wanted to see if there was an option.

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

Posted on Dec 01, 2010

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My canon eos 40D keeps playing err-05 which says pop up flash not working and to turn camera off and on again to solve problem, but nothing happens and camera will not work. what can I do?


If the camera thinks you have an external flash attached to the hot shoe it will not allow the built in flashto pop up. so you can try this...
Here's a very simple solution I found to get the flash to pop up without destroying your camera.
http://forums.dpreview.com/forums/read.asp?forum=1031&message=31993875
the person suggests using a fingernail. (s)he must have long fingernails. I had to use a piece of paper folded in half. Swipe the paper from back to front, as in, from the eyepiece side towards the lens side.
Here's a picture: http://www.flickr.com/photos/dougpardee/133066175/
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Here is a link to Canon's website for your 40D there you will find the latest firmware version for your camera. Version 2.0.0 which includes 1.0.8 . In 1.0.8 item #3 in the list of changes it states repairs a phenomenon where reviewed images appear unnatural.

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1 Answer

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