Nikon D4S User Manual

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f: Shutter-Priority Auto
In shutter-priority auto, you choose the shutter speed while the 
camera automatically selects the aperture that will produce the 
optimal exposure.
To choose a shutter speed, 
rotate the main command 
dial while the exposure 
meters are on. Shutter speed 
can be set to “p” or to 
values between 30 s and 
1
/
8000
s. Shutter speed can be 
locked at the selected setting (
Main command dial