Nikon D750 DSLR Camera (Body Only) - Manual (Page 256)

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A
Release Mode
Regardless of the release mode selected, the camera will take the
specified number of shots at each interval.
A
Bracketing
Adjust bracketing settings before starting interval timer photography.
If exposure, flash, or ADL bracketing is active while interval timer
photography is in effect, the camera will take the number of shots in
the bracketing program at each interval, regardless of the number of
shots specified in the interval timer menu. If white balance bracketing
is active while interval timer photography is in effect, the camera will
take one shot at each interval and process it to create the number of
copies specified in the bracketing program.