Canon EOS 80D - Manual (Page 154)

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If you shoot an image with a fast shutter speed under a light source
such as fluorescent light, the blinking of the light source causes flicker
and the image may be vertically unevenly exposed. If continuous
shooting is used under these conditions, uneven exposures or colors
across the images may result. When you use this feature during
viewfinder shooting, the camera detects the frequency of the light
source’s blinking and takes the picture when the flicker causes less
effect on exposure or color tone.
1
Select [Anti-flicker shoot.].
 Under the [z4] tab, select [Anti-
flicker shoot.], then press <0>.
2
Select [Enable].
3
Take the picture.
 The image will be taken with reduced
unevenness of exposure or color tone
caused by the flicker.
3
Reducing FlickerN
 When [Enable] is set and you shoot under a flickering light source, the
shutter-release time lag may become longer. Also, the continuous
shooting speed may become slower, and the shooting interval may
become irregular.
 This function does not work with Live View shooting or movie shooting.
 In the <d> or <f> mode, if the shutter speed changes during continuous
shooting or if you shoot multiple shots of the same scene at different shutter
speeds, the color tone may be inconsistent. To avoid inconsistent color
tones, use the <s> or <a> mode at a fixed shutter speed.
 The color tone of images shot when [Anti-flicker shoot.] is set to
[Enable] may look different from when [Disable] is set.
 Flicker at a frequency other than 100 Hz or 120 Hz cannot be detected.
Also, if the flickering frequency of the light source changes during
continuous shooting, effects of the flicker cannot be reduced.