Histograms are now widely available on many digital cameras, but what do they actually do? PCMagazine has most of the answers in a short article called “Harnessing Histograms” (found via Digicamera.net).

“Histograms are not widely understood, but taking a few moments to learn about them can improve your photography significantly. Histograms can show you clearly and immediately whether your images are overexposed, underexposed, or just right, and help you to make any necessary changes in order to compensate when reshooting the scene.”

Website: PCMagazine - Harnessing Histograms