Question about Canon Cameras

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HI, my EOS 350D is having trouble with the auto focus and either won't focus or if it tries to take a picture comes up with the error reading "error99" ??? :-(

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1. Turn off the camera.
2. Remove the lens, battery, and CF card.
3. Allow the camera to sit without power for approximately 20 minutes.
4. Insert a fully charged battery, and turn on the camera.
5. Depress the shutter button as you would to take a picture.
Does the “ERR 99? message appear? If it does, then the camera should be
serviced. If it does not, then please proceed to the next set of steps:
1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
5. Depress the shutter button as you would to take a picture.
Does the “ERR 99? message appear? If so, then the CF card is the most
likely source of the issue. Try using a different card.
If the message does not appear, please complete the following steps:
1. Turn off the camera.
2. Clean the lens contacts by gently rubbing them with a pencil eraser
or soft cloth. Be careful that you do not let any debris fall into the
camera body.
3. Reattach your lens.
4. Turn on the camera.
5. Depress the shutter button as you would to take a picture.
If the “ERR 99? message only appears when one particular lens is
attached, then that lens should be examined by a service technician.
If you see the “ERR 99? with a different Canon lens attached, then the
camera should be serviced.

error 99 is a catch-all code when the camera can't figure out what is the problem. One thing to try is to switch lenses. If it goes away, clean the contacts on the lens it happened with, and on the camera body. Try again. If the problem persists, it may be the lens. If the problem keeps happening regardless of the lens used or whether you've cleaned the contacts, it may be there's a problem with the body.

The 000s in aperature value are definitely linked to lens contacts. Remove the lens.... clean the contacts... replace lense. should fix the error.

Thanks!!!!

Posted on Sep 02, 2010

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1 Answer

My daughters 350d will only take pictures in manual focus mode, in auto focus it all seems good but it won't actually take the picture? Any ideas?


Shutter Assy, Mirror Assy or Shutter Button taken a coffee breaks.

You did try using a new battery?
Or your battery is not over 3 years old?

If I can help, just send me an email.
atdlee@netzero.com

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I have read quite a lot about this infamous Error 99 on the Internet. Rather than try to summarise or duplicate the information here, I'm going to point you to someone who's already done just that, from bitter experience, I think! There's a very comprehensive essay about the various possible causes of Error 99 here (follow link).

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