GlossaryAppendixes 149Shutter speedShutter speed refers to the amount of time it takes to open and close the shutter,and it is an important factor in the brightness of a photo, as it controls the amountof light which passes through the aperture before it reaches the image sensor. Afast shutter speed allows less time to let light in and the photo becomes darker andmore easily freezes subjects in motion.VignettingA reduction of an image’s brightness or saturation at the periphery (outer edges)compared to the center of the image. Vignetting can draw interest to subjectspositioned in the center of an image.White balance (color balance)An adjustment of the intensities of colors (typically the primary colors red, green,and blue), in an image. The goal of adjusting the white balance, or color balance, isto correctly render the colors in an image.

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