Using histograms will help you determinate the highlights and the shadows and basically a really good exposure for your image. Most cameras will let you view a histogram after the fact and some cameras will leave you a histogram while you are shooting. You can bring it up usually by pressing the info or display button. The histogram shows you the actual exposure levels in graph form of every part of the frame. On the left side of the histogram we’ll see our shadows and on the right side we’ll see our highlights. Up and down will be the levels of exposure in the graph. You want to get a really nice and healthy exposure by having a good medium fat graph in the middle between your shadows and your highlights. It can also include color and tonal values, depending on your camera.
