Nikon D750 User Manual page 165

3
Adjust settings.
The maximum value for auto ISO
sensitivity can be selected using
Maximum sensitivity (note that if the
ISO sensitivity selected by the user is
higher than that chosen for
Maximum sensitivity, the value
selected by the user will be used instead). In modes P and A,
sensitivity will only be adjusted if underexposure would
result at the shutter speed selected for Minimum shutter
speed ( –30 s, or Auto; in modes S and M, ISO sensitivity
/
1
2000
will be adjusted for optimal exposure at the shutter speed
selected by the user). If Auto is selected, the camera will
choose the minimum shutter speed based on the focal
length of the lens. Press J to exit when settings are
complete.
When On is selected, the viewfinder
and control panel show ISO AUTO. When
sensitivity is altered from the value
selected by the user, these indicators
flash and the altered value is shown in
viewfinder.
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