Selecting [] reduces the effects of flicker from such light sources as fluorescent or mercury-vapor lamps.
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Flicker can cause uneven exposure or (in photographs taken in continuous release modes) inconsistent exposure or coloration.
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If flicker reduction does not produce the desired results, turn the camera off and aim it at the subject or light source before turning it on again.
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If [] is selected and flicker is detected when the shutter is released, a green I will appear next to the FLICKER icon in the shooting display.
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If [] is selected, the shooting display will briefly go dark when the shutter is released. In continuous high-speed and continuous low-speed modes, the camera will behave as described below.
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Continuous high-speed: Priority is given to frame rate. The display will briefly go dark with the first shot in each burst but not with the subsequent shots.
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Continuous low-speed: Priority is given to flicker reduction. The display will briefly go dark each time the shutter is released and the frame rate may drop or become erratic.
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Flicker reduction may slightly delay shutter response.
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Flicker reduction can detect flicker at 100 and 120 Hz (associated respectively with AC power supplies of 50 and 60 Hz). The desired results may not be achieved if the frequency of the power supply changes during burst photography.
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Flicker may not be detected or the desired results may not be achieved depending on the light source and shooting conditions, for example with scenes that are brightly lit or feature dark backgrounds.
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The desired results may also not be achieved with decorative lighting displays and other non-standard lighting.
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The actual effects of photo flicker reduction may differ from those visible in the display.
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When [] is selected for Custom Setting a1 [], flicker reduction for continuous high-speed release mode behaves in the same way as it does for continuous low-speed release.
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Flicker reduction may not produce the desired results during burst photography if:
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the shutter speed changes (mode A or P),
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the frame advance rate slows, or
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the bursts are long.
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[] does not take effect under some conditions, including during:
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HDR overlay and
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high-speed frame capture.