David Busch's Nikon Z5 Guide to Digital Photography

Troubleshooting and Prevention

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One of the nice things about modern electronic cameras like the Nikon Z5 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. You don’t even have to worry about complicated mechanical linkages from camera to lens to physically stop down the lens aperture. Instead, tiny, reliable motors are built into each autofocus lens (and you lose the use of only that lens should something fail). Of course, the camera also has a moving shutter (if you’re not using the electronic shutter), and that can fail, but the mechanical shutter is built rugged enough that you can expect it to last several hundred thousand shutter ...