Canon EOS Rebel XT Instruction Manual page 108

Image Playback
Shooting Information Display
Image
Flash exposure
compensation amount
Shooting time
Shooting date
Shutter speed
Images recorded/
Total images recorded
Aperture
Image protect
Exposure compensation amount
Image-recording quality
File No.
Histogram
ISO speed
Color space
Metering mode
Shooting mode
WB correction
White balance
Histogram
Sample Histograms
A histogram is a graph indicating the image's
brightness distribution. The horizontal axis indicates
the brightness level (darker on the left and brighter on
the right), while the vertical axis indicates how many
Dark image
pixels exist for each brightness level.
The more pixels there are toward the left, the darker
the image. And the more pixels there are toward the
right, the brighter the image.
Normal image
If there are too many pixels on the left, the shadow
detail will be lost. And if there are too many pixels on
the right, the highlight detail will be lost. The tones in-
between will be reproduced.
Bright image
With the image's histogram, you can check how
accurate or lopsided the exposure is and how rich the overall tonal range is.
Highlight Alert
When the shooting information is displayed, any overexposed areas of
the image will blink. To obtain more image detail in the overexposed
areas, set the exposure compensation to a negative amount and shoot
again.
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