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The DSLR Field Guide by Michael Freeman

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Powering the Camera

One of the biggest drawbacks of digital cameras compared with traditional film SLRs is their total reliance on and consumption of power.

With a film camera, even if the batteries failed you could take a photo as this was a purely mechanical operation (although you wouldn’t be able to use the camera’s light meter), but digital cameras require power—and plenty of it to operate at all. For this reason, battery management is important, never more so than when you are traveling and are far from reliable power sources. There are a number of issues here, but all are to do with ensuring that you have enough power to shoot from day to day.

Depending on the model, digital cameras have either custom batteries or accept AA size. In the ...

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