Nikon D750 DSLR Camera (Body Only) - Manual (Page 408)

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Reduce flicker and banding when shooting under fluorescent or
mercury-vapor lighting during live view or movie recording.
Choose
Auto to allow the camera to automatically choose the
correct frequency, or manually match the frequency to that of
the local AC power supply.
D
Image Sensor Cleaning
Dust off reference data recorded before image sensor cleaning is
performed can not be used with photographs taken after image
sensor cleaning is performed. Select
Clean sensor and then start
only if the dust off reference data will not be used with existing
photographs.
D
Image Dust Off Reference Data
The same reference data can be used for
photographs taken with different lenses or
at different apertures. Reference images can
not be viewed using computer imaging
software. A grid pattern is displayed when
reference images are viewed on the camera.
Flicker Reduction
G button
➜
B setup menu
A
Flicker Reduction
If Auto fails to produce the desired results and you are unsure as to the
frequency of the local power supply, test both the 50 and 60 Hz
options and choose the one that produces the best results. Flicker
reduction may not produce the desired results if the subject is very
bright, in which case you should try choosing a smaller aperture
(higher f-number).