Nikon D3400 Kit Owner's Manual

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P, S, A, and M Modes
P
SA, and M modes can be selected by rotating 
the mode dial and offer different degrees of 
control over shutter speed and aperture:
Mode
Description 
P
Programmed auto 
(
Recommended for snapshots and in other 
situations in which there is little time to 
adjust camera settings. Camera sets shutter 
speed and aperture for optimal exposure.
S
Shutter-priority auto 
(
Use to freeze or blur motion. User chooses 
shutter speed; camera selects aperture for 
best results.
A
Aperture-priority 
auto 
(
Use to blur background or bring both 
foreground and background into focus. User 
chooses aperture; camera selects shutter 
speed for best results.
M
Manual (
User controls both shutter speed and 
aperture. Set shutter speed to “Bulb” or 
“Time” for long time-exposures.
A
Using the Built-in Flash
For flash photography, press the 
M (Y) button to raise the flash.