David Busch's Nikon Z50 Guide to Digital Photography

Mastering the Mysteries of Focus

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Today, modern digital cameras like the Z50 can identify potential subject matter, lock in on human faces, if present, and automatically focus faster than the blink of an eye. Usually. Of course, sometimes a camera’s AF will zero in on the wrong subject, become confused by background pattern, or be totally unable to follow a fast-moving target like a bird in flight. While autofocus has come a long way in the last 30-plus years, it’s still a work-in-progress that relies heavily on input from the photographer. Your Nikon Z50 can calculate and set focus for you quickly and with a high degree of accuracy, but you still need to make a few settings that provide guidance on three Ws of autofocus: what, where ...