Nikon Z 8 Reference Manual page 460

D
Cautions: High-Frequency Flicker Reduction
The effects of flicker in the shooting display may differ from those seen in photographs. We
recommend that you take test shots to identify the shutter speed that minimizes flicker and
banding.
Exposure maintenance is disabled while high-frequency flicker reduction is in effect, even when
[Shutter speed] is selected for Custom Setting b7 [Keep exp. when f/changes].
Tip: Using "Recall Shooting Functions" with High-Frequency Flicker Reduction
Selecting [Save current settings] for Custom Setting f2 [Custom controls (shooting)] > [Recall
shooting functions] or [Recall shooting functions (hold)] while high-frequency flicker reduction is
in effect saves the shutter speed currently selected via fine-tuning. This allows you to, for example,
identify and save the shutter speed that minimizes striping in a high-frequency LED display and then
instantly recall the stored value using the selected button only when the LED display is in the frame.
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High-Frequency Flicker Reduction