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David Busch's Canon EOS R Guide to Digital Photography by David D. Busch

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17

Troubleshooting and Prevention

One of the nice things about modern electronic cameras like the Canon EOS R 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 the EOS R dispenses with one of the few major moving parts that digital SLRs have—the mirror that flips up and down with each shot not taken using live view.

Of course, the camera also has a moving shutter that can fail, but the shutter is built rugged enough ...

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