Exposure Bracketing is a feature available on most digital cameras that allows you to take three images at three different exposure values (Ev) with just one click of the shutter button. One image uses the original setting, then a second image is created by changing the exposure value to underexpose the image (less light), and a third image is over-exposed (more light). You only press the shutter button once, but the three images of the same scene are created with the different exposure settings.
This is useful for times when you’re not sure about the settings, if there is tricky lighting, or when time is running out on the scene, and you need to get the correct exposure. In the examples below, the middle photo is the original, while the left image is overexposed by an Exposure Value of +1, and the right image underexposed by -1Ev.
The scale below is the same scale as the camera light meter. When bracketing, you select the value of over/under exposure by identical positive/negative values in a range between +/- 1/3 Ev to +/- 2.0 Ev. The camera should adjust the exposure without changing ISO, aperture, or shutter speed.
