Question about Canon Rebel XT / EOS 350D Digital Camera
the storeman's solution is one way to attack this type of problem. his knowledge about the error code 99 is absolutely correct. if this does not work, you may want to try this one.
i did had the same problem with my XTi and was able to resolve this. normally if you have this strange behavior with the lense diaphragm, then chances are there is a problem with the lens.
1st troubleshooting steps:
1. If you happen to have another lens, an EF or similar EFS lens, you may want to try changing first the lens.
2. If the camera works just fine, then the lens would definitely be the one causing the error message.
with the observations you have made upon viewing the view finder (image becomes darker), this can be suspected as a malfunction on the lens diaphragm.
i took my unit to the CANON service facility and was quoted for 145US$. according to them the lens can be repaired by replacing the parts inside the barrel. when i asked for the costly reason behind they said, parts that can be ordered from Japan comes in one assembly only (that means, everything inside the lens except for the barrel or the outer body of the lens)...cool.
2nd troubleshooting steps:
1. to check if this is indeed a lens diaphragm problem, set your camera function to either Av or manual.
2. Adjust your aperture value to the largest number...say f22.
3. set the camera to the lowest focal length.
4. with the camera facing you (so you can see the lens diaphragm blades move), do a half press on the shutter followed by a press at the depth of field preview button (below the lens mount portion of the camera body). try doing this at both wide and zoom mode of your lens. you should be able to observe the diaphragm blades open and close as you press and release the depth of field preview button.
normally, with the given condition of your lens (darkening of the image viewed from the view finder), the diaphragm blades will not function on either one of the zooming range of the lens.
this problem actually is an internal problem on the lens whereby the flexible connector that connects the diaphragm contacts to the electronic circuit board is already worn (broken).
i took my lens to a non authorized canon service and the repalcement cost for the flexible connector was about 20US$. it is normally cheaper to take this case to a non authorized canon service facility in your area since the problem is just a simple flex connector replacement and is often cheaper than taking it to the canon authoized service center.
hope this one helps!
Posted on Mar 05, 2009
Error 99 is a generic error in that the camera does not know what the exact error is. The usual fix for this error is ......
Turn the camera off and remove the battery.
Remove the lens and clean the electrical contacts on the rear of the lens with a soft dry cloth.
Refit the lens and the battery and switch back on. Hopefully all will be well again.
Posted on Jul 09, 2008
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Posted on Jan 02, 2017
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