Appendixes 124GlossaryShutter speedShutter speed refers to the amount of time it takes to open andclose the shutter, and it is an important factor in the brightness ofa photo, as it controls the amount of light which passes throughthe aperture before it reaches the image sensor. A fast shutterspeed allows less time to let light in and the photo becomesdarker and more 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. Vignettingcan draw interest to subjects positioned in the center of animage.White balance (color balance)An adjustment of the intensities of colors (typically the primarycolors red, green, and blue), in an image. The goal of adjustingthe white balance, or color balance, is to correctly render thecolors in an image.
