Basic Photo Tip: Exposure compensation

In the vast majority of photos, if you took all of the colors in the photo (when properly exposed) and swirled them all together, it would come out as a medium grey. They call this 18% grey. The light meter in your camera is designed to expose your photos to match 18% grey.

Most of the time this works with fantastic results. It is simply amazing that such a basic idea works out 80% of the time. However, there are a few instances when 18% grey won't work.

If you have an overly bright photo, like kids playing in the snow, your shot will likely have grey-colored snow. If the photo is overly dark, like a close-up of three Oakland Raiders in their black home uniforms, your shot will likely have grey uniforms and overexposed faces. The 18% grey is the culprit in both situations.

You can get past this problem by using the exposure compensation setting on your camera. Most cameras have it, even point-and-shoots. It allows you to add or subtract exposure from your shot.

By adding in one to two stops* of extra exposure in your shot of snow, everything should turn out looking bright and white. Similarly, by subtracting one to two stops of exposure in the close-up of the Raiders players, the uniforms should be brought down to their usual black.

You may need to experiment a little with what works best in each of your photo taking situations. Just don’t forget to dial that exposure compensation back to zero when you are done, or you will likely regret it the next time you pull out your camera!

*for information about what a stop is, see the lesson on aperture and ISO speeds.