Nikon D4S ユーザーズマニュアル

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ISO Sensitivity
The camera’s sensitivity to light can be adjusted according to the 
amount of light available. Choose from settings that range from 
ISO 100 and ISO 25600 in steps equivalent to 
1
/
3
 EV. Settings of 
from about 0.3 to 1 EV below ISO 100 and 0.3 to 4 EV above ISO 
25600 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 panels or 
viewfinder.
Manual Adjustment
Top control panel
Rear control panel
Viewfinder
S button
Main 
command dial