Using your Preview Screen and Histogram
One of the great advantages of digital cameras is that you can look at the image right after taking the picture. You can zoom in on your photograph to see if your subject is sharp where you want it to be sharp. If parts of your image are overexposed so that they do not have detail in your preview screen , those parts of your image will blink black & white (I admit it: I call this the "blinkies"). You can know ahead of time if you have exposure problems with your image. If you are shooting in RAW , you still might have detail in those parts of the photograph, but don't count on it--take the picture again if you can. But in terms of exposure , the most useful part of the preview screen is what's called the histogram. A histogram is a graph of the exposure values in your image. On your preview screen, it will look something like this: The left side of the histogram represents the darker parts of your image, and the right side represents the light...