Error 99 i think canon should have more details on error 99.this is a big problem from what i read so get on a solution.

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).

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).

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).

It is most likely an electrical contact failure between the lens and the camera. For more details and possible causes read the following article:
http://www.lensrentals.com/news/2008.12.31/canon-err99

It is due to some kind of electrical (contact) failure.
For more details and common causes of Err 99 read the following article:
http://www.lensrentals.com/news/2008.12.31/canon-err99

It is due to some kind of electrical contact failure.
For more details and common causes of Err 99 read the following article:
http://www.lensrentals.com/news/2008.12.31/canon-err99

It is due to some kind of electrical contact failure.
For more details and common causes of Err 99 read the following article:
http://www.lensrentals.com/news/2008.12.31/canon-err99

Go to the www.canon.com website and find out what Error 99 means. ted10

It would seem this problem has frustrated other users, read this thread on photo.net

Assuming that other lenses function normally on the camera, the "Err 99" can be caused by a failure of the aperture component in the lens. Error 99 is a generic error, so unfortunately it does not indicate exactly what is wrong. There are other factors that can cause the failure, but there is a good chance that the aperture is not functioning correctly. You can try cleaning the electrical contacts on the lens, if this does not work you may need to get the lens serviced. Check with Canon, or check the web for other repair service providers. David Millier Advance Camera Repair