Buttons And Dials - Nikon D300 Quick Manual

Buttons and Dials

Focus-mode selector
Modes S and C (autofocus)
The camera focuses using autofocus (AF) when shutter-release
button is pressed halfway. In mode S (single-servo AF), focus locks
when the camera focuses. In mode C (continuous-servo AF), the
camera continues to adjust focus until the shutter is released
(pg. 28).
Mode M (manual)
Focus is adjusted manually using the lens focusing ring.
Depth-of-field preview button
Preview depth of field.
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