Specifically, it??™s fairly easy for real-life scenes to trick your camera??™s exposure sensor and
consequently under- or overexpose a picture. You can fix that tendency to some degree on the
PC afterwards (and we??™ll talk about how to do that in Chapter 13), but it??™s much better to expose
the picture correctly to begin with. That??™s because an over- or underexposed image is missing
information about colors, texture, and detail that can never be restored afterwards; only at the
moment of exposure can you ensure that all the information will be in your image.
What are some examples of tricky photos? There are many, but a few problems tend to
surface most frequently. If you or the camera bases the exposure on the darkest part of a scene,
the rest of the picture might end up overexposed. Pointing the camera at the lightest parts, on the
other hand, can result in overall underexposure.
CHAPTER 3: Understand Exposure 55
There are several solutions to these kinds of problems, and you can experiment to see which
works best for you in various situations. Here are some ways you can correct your exposures
when you see a problem in the viewfinder:
?– Use exposure compensation Use the exposure compensation control, sometimes
abbreviated as ???EV??? or labeled with a +/??“ symbol, to intentionally under- or overexpose
your pictures beyond what the camera??™s exposure sensor recommends.
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