"The Mighty Histogram!"
Have you ever wondered why some photographers take a shot and then quickly look at their LCD screen? They are probably not checking how the image looks as the screen is quite small. Instead they are reviewing the tonal qualities in that particular image to see if adjustments need to be made. Two screens that are invaluable to photographers are the histogram and the highlights (blinkies). I’ll address the former on this week’s blog.
Most cameras will give you choices as to which screen to look at after the picture is taken and processed in the camera. See if your camera has this option. If so, make sure HISTOGRAM is selected. Histograms can have different looks depending on the exposure of your image. Some photographers claim that the perfect histogram will have a bell-shape to it.
This is not always the case, especially if you have a scene with fog, snow, nighttime, etc. These images will dramatically alter that bell shape by having more information on the left (shadows) or the right (highlights).
Of course, this has been a very simplistic look at this most important digital tool. There is much more which can be found at these sites: