C: Timers/Ae Lock; C1: Shutter-Release Button Ae-L; C2: Auto Meter-Off Delay; C3: Self-Timer - Nikon D300S User Manual

c: Timers/AE Lock

c1: Shutter-Release Button AE-L

At the default setting of Off, exposure only
locks when the AE-L/AF-L button is pressed. If
On is selected, exposure will also lock when
the shutter-release button is pressed
halfway.

c2: Auto Meter-off Delay

Choose how long the camera continues to
meter exposure when no operations are
performed. The shutter-speed and aperture
displays in the control panel and viewfinder
turn off automatically when the exposure
meters turn off.
Choose a shorter meter-off delay for longer battery life. When the
camera is powered by an optional EH-5a or EH-5 AC adapter, the
auto meter-off delay is equivalent to No limit.

c3: Self-Timer

Choose the length of the shutter release
delay in self-timer mode.
G button A Custom Settings menu
G button A Custom Settings menu
G button A Custom Settings menu
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