Nikon D3400 Triple Lens Parent's Kit Owner's Manual

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101
P, S, A, and M Modes
Mode S (Shutter-Priority Auto)
This mode lets you control shutter speed: choose fast shutter 
speeds to “freeze” motion, slow shutter speeds to suggest 
motion by blurring moving objects. The camera automatically 
adjusts aperture for optimal exposure.
To choose a shutter speed:
1
Rotate the mode dial to S.
Fast shutter speeds (e.g., 
1
/
1600
s) 
freeze motion. 
Slow shutter speeds (e.g., 1 s) blur 
motion.
Mode dial