What is a Histogram?

Most higher-end digital cameras support a histogram feature that can be displayed before or after you take a photo. Though it looks like a complex chart, a histogram is merely a representation of an image’s brightness, and whether or not it has rich shadow and highlight areas.

Without going into science or a lot of details, here’s how you can use your histogram while taking pictures. If the histogram is weighted towards the left side with vary little if any curvature near the right, your photo will most likely be underexposed (too dark). Use your exposure compensation tool to brighten the image. Consider a slower shutter speed to allow more light to enter the camera lens.

Note that there are exceptions. Are you taking photos of fireworks in a night sky? Since most of the picture will be dark your histogram should naturally be weighted towards the left.