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The Canon EOS Rebel T2i is a continuation of Canon's entry-level line of DSLR cameras, the Rebel series. The Rebel T2i is also known as the 550D and the Kiss X4.

How to fix Err20

How to fix Err20 to my camera?

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Error 20 on canon cameras means that the mirror is stuck. First, remove the battery and wait ~30 seconds before reinserting it and turning it on. If this does not resolve the error, you can attempt to follow something like this tutorial but this risks damaging the sensor. Unless you are very comfortable with disassmenbling prescision electronics, I would reccommend taking it to a professional camera repair store to fix the mirror.

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