Sony DSLR A700H User's Guide - Page 86

z About Histogram Number of pixels Dark Light A histogram is the luminance distribution that shows how many pixels of a particular brightness exist in the picture. This camera has four histogram displays that are separately for luminance and RGB, and each shows the brightness on the horizontal axis (left side is black, right side is white) and the number of pixels on the vertical axis. The exposure compensation will change the histogram accordingly. Below is an example. Use the exposure compensation on the positive side. This compensation brightens the whole picture, making the entire histogram shift to the bright side (right side). If the exposure compensation is applied on the negative side, the histogram will shift to the other side. Both ends of the histogram consist only of data of 100% black or white*. Checking the histogram allows you to know the status of the image beforehand. * To be exact, a color image is expressed with RGB. Thus, the white is equal to R255, G255, B255, and the black is equal to R0, G0, B0. Enlarging images An image can be enlarged for closer examination. (Enlarge) button Multi-selector (Playback) button Front control dial Rear control dial 86