David Busch's Nikon D3400 Guide to Digital SLR Photography

12

Troubleshooting and Prevention

You won’t expend a lot of effort keeping your Nikon D3400 humming and operating smoothly. There’s not a lot that can go wrong. An electronically controlled camera like the Nikon D3400 has fewer mechanical moving parts to fail, so they are less likely to “wear out.” There is no film transport mechanism, no wind lever or motor drive, and, when using lenses with the AF-S designation (as described in Chapter 10), no complicated mechanical linkages from camera to lens to adjust the automatic focus. 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 ...