Nikon D90 User Manual page 150

❚❚ RGB Histogram
1 Protect status .................139
2 Retouch indicator .........209
3 White balance ..................95
White balance fine-
I
tuning .............................. 97
4 Camera name
1 Displayed only if RGB histogram is selected for Display mode (pg. 163).
A
Playback Zoom
To zoom in on the photograph when the histogram is displayed, press X
(for more information on playback zoom, see page 138). The histogram
will be updated to show only the data for the portion of the image visible
in the monitor.
A
Histograms
Camera histograms are intended as a guide only and may differ from those displayed in
imaging applications. Some sample histograms are shown below:
If the image contains objects with a wide range of
brightnesses, the distribution of tones will be relatively
even.
If the image is dark, tone distribution will be shifted to the
left.
If the image is bright, tone distribution will be shifted to the
right.
Increasing exposure compensation shifts the distribution of tones to the right, while
decreasing exposure compensation shifts the distribution to the left. Histograms can provide
a rough idea of overall exposure when bright ambient lighting makes it difficult to see
photographs in the monitor.
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5 Histogram (RGB channel).
In all histograms,
horizontal axis gives
pixel brightness, vertical
axis number of pixels.
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6 Histogram (red channel)
7 Histogram (green
channel)
8 Histogram (blue channel)
9 Frame number/
total number of images
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