Question about Canon EOS-10D Digital Camera

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Error 99 I have a Canon 10D that worked fine for a little over a year, than I started getting Error 99's. You click the shutter button and nothing happens except an odd sounding click, and the "error 99" blinking in the LCD. At this point the camara is usless until you turn it off and than back on. This became more and more frequent until now I just can't depend on my camara any more. The problem, with my camara seems to have nothing to do with lens contacts or the memory card. I have search several message boards, and it seems that this this Error 99 thing is not that uncommon with Canon DSLR's. I am wondering if there is a similar problem with Nikon, or any of the other DSLR's. I am trying to decide whether to pay to get this thing fixed, or just buy another camara or both. I have heard that getting an error 99 problem fixed can be quite expensive. If I opt to buy a new camera should I switch brands? Any openions on this? Thanks:

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Re: Error 99

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.

Posted on Jan 30, 2009

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Re: Error 99

It's probably the battery/battery contacts. It was relatively common with the 10D. I now use a 20D and a Rebel XT. I've had an Error99 once on my 20D, when I first got it, but none since them. I've never had an Error99 on my Rebel XT. By the way, upgrading from the 10D to the 20D would be well worth doing. The 20D simply has better electronics all around than the 10D. Even the Rebel XT does. I replaced my 10D with the Rebel XT. The XT really is that much better.

Posted on Sep 14, 2005

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Re: Error 99

I get error 99 sometimes on my 20 D but it?s usually to do with a lens that is attached. Sigma lens have been known to cause error's. If it's not that or dirty contact on the lens then it could be a more serious problem. I would at least check it out with a canon dealer/repair centre.

Posted on Sep 14, 2005

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If you have another lens, try it with that lens and see if it works properly. Many times ERR 99 is caused by a failure of either the circuit or the aperture unit in the lens.

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Err 99 usually means your lens contacts are dirty either on the lens itself or on the camera.

To isolate the cause of the issue, do the following: -
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 only 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 so, the camera may be faulty and requires a service. If it does not, then: -
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 faulty. Try a different card. If the message does not appear: -
1. Turn off the camera.
2. Clean the gold contacts on the lens by GENTLY rubbing them with a pencil eraser or soft cloth. Keeping the camera face pointing down, also clean the gold contacts on the camera, being 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 is faulty and should be serviced.

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1 Answer

Err 99 when I attach lens


I had the same problem with my camera and i found this guide online very helpful in most cases




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.

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2 Answers

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Check this link: www.richardsnotes.org/archives/2005/04/29/50mm-lens-contact-points/

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Exactly same problem, shutter clicks until battery removed. Power may be on or off.

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Error 99 is a general fatal error.
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It can be caused by a dicky shutter, problems with the CF card interface.

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If it takes a picture and gives error 99 but there is no picture on the card or the picture is 0KB its a CF interface problem.

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2 Answers

Err 99


Although you may have cleaned the lens contacts, did you clean the camera contacts? This is a bit harder but it’s doable: just hold camera so lens opening points down so no gunk falls in. Erase lightly. I used a lens cloth and dabbed at the contacts rather than blow them so as not to blow the erasings inside the camera.

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.


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