Question about Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens

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My Canon Rebel XTi has repeatedly had the Err99 message pop up, and it's to the point that it happens, at minimum, every 4-5 shots I take. I've tried cleaning the camera and lens contacts multiple times, but the problem has gotten increasingly worse and refuses to be fixed. I have a 17-85mm Canon zoom lens and I'm not sure what I should do at this point.

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  • 2,187 Answers

There are several issues which may have caused this, one is the CF another are the lenses. I found the solution months ago from this site.

To isolate the cause of the issue, I suggest that you 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 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 Jun 24, 2009

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I just bought a canon rebel xt and I have been playing around with settings I am very new to photography. As of right now when I try to take the shot the flash keeps blinking and its says busy and it wont...


It sounds like you might be too close to whatever it is you're trying to take a picture of. Each camera lens has a minimum focus distance listed on it that determines how close you can get to something and still take a picture. Page 45 of the XTi manual talks about minimum focusing distance and describes the camera's behavior.
It's also possible that there is not enough light for the lens to focus. In this situation you might have to flip the switch on the lens to manual focus to take your picture.
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Sounds like you have shot so many photos you have worn out the shutter box. The box is usually good for about 10,000 actuations... so... sounds like you have gotten far more than that out of it.

I have one XTi with a buddy right now who is a certified Canon, Nikon and Fuji tech and he's putting in a new shutter box for one of my customers. It's the first one he's done so I will see if he wants to keep doing them or not and how much he would want if he decides he will continue to do them for me.

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Good luck from Darntoothysam com

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