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Troubleshooting and Prevention

One of the nice things about modern electronic cameras like the Canon EOS T7i is that they have fewer mechanical moving parts to fail, so they are less likely to “wear out.” No film transport mechanism, no wind lever or motor drive, and no complicated mechanical linkages from camera to lens to physically stop down the lens aperture. Instead, tiny, reliable motors are built into each lens (and you lose the use of only that lens should something fail), and one of the few major moving parts in the camera itself is a lightweight mirror (its small size one of the results of the T7i’s 1.6X crop factor) that flips up and down with each shot.

Of course, the camera also has a moving shutter that can fail, but the shutter ...

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