Error 99 on EOS Canon 450D

When using third party lenses, most notably older Sigma lenses, there may be a compatibility issue. Reports exist of people receiving "Err99" errors when using such lenses. The problem is more pronounced when using older lens that do not feature an HSM focus drive. Using the problematic lens wide open is sometimes possible.[4] Another cause of Err99 messages involve EF-S 18-55 lenses (kit lens for the 350D and 20D) that are defective; purchasing used EF-S 18-55 lenses is a risk factor, especially from eBay auctions (some auction listings state if the lens was never used - especially those claiming that the lens was originally part of an EOS 400D kit; the best way is to verify the serial numbers indicating the manufacture date).

This is what the people at the canon tech support say to do for error 99



read this!! :)

The guy at tech support listened and then told me that the lens contacts were dirty and to get a pencil with an eraser on the end, just a regular old pencil with a red rubber eraser. Detach the lens from the camera, hold it so that the lens’ gold contacts are pointing down and lightly erase their exposed surface, cleaning them of any hand oil that might have gotten on them.

Do the same thing with the gold contacts inside the camera body. 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.

I did this to each of my three lenses just to be sure. Lo and behold, it worked



hope this works for you!!!! have a nice day!! :) :)