Sony NEX-F3 Instruction Manual page 136

What is histogram ?
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The histogram displays the luminance distribution that shows how many pixels of a
particular brightness exist in the picture. Brighter image will make the entire histogram shift
to the right side, and darker image to the left side.
Flash R (red) Luminance
G (green) B (blue)
• If the image has a high-key or low-key portion, that
portion flashes on the histogram display during
playback (Luminance limit warning).
GB
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