Nikon D800 - Manual (Page 133)

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S
109
S
ISO Sensitivity
“ISO sensitivity” is the digital equivalent of film speed. Choose
from settings that range from ISO 100 to ISO 6400 in steps
equivalent to
1 /
3
EV. Settings of from about 0.3 to 1 EV below ISO
100 and 0.3 to 2 EV above ISO 6400 are also available for special
situations. The higher the ISO sensitivity, the less light needed to
make an exposure, allowing higher shutter speeds or smaller
apertures.
ISO sensitivity can be adjusted by
pressing the
S button and
rotating the main command dial
until the desired setting is
displayed in the control panel or
viewfinder.
Manual Adjustment
Main command
dial S button
Control panel Viewfinder