Exp Comp/Fine Tune; Custom Setting B3 (D300S And D) - Nikon D300 User Manual

My Recommendation: Similar to ISO sensitivity step value,
I keep EV steps for exposure cntrl. set to 1/3 step. It's critical
to control the EV steps with granularity, especially with
exposure. It's best to increment the EV in small steps for use
with the histogram.

Exp Comp/Fine Tune

Custom setting b3 (D300S and D300)
(User's Manual – D300S page 270; D300 page 275)
Exp comp/fine tune is concerned with the granularity of
exposure or flash compensation. Most of us will use the
exposure or flash compensation system at one time or
another.
Exposure compensation adjustments are made with the +/-
Exposure compensation button on the top right of the camera,
just behind the Shutter-release button. The Flash
compensation button is right below the button that opens the
pop-up Speedlight flash on the front of the camera. It has a
small lightning bolt arrow icon.
Holding the Exposure compensation button and turning the
rear Main command dial allows you to adjust the exposure
compensation. Holding the Flash compensation button and
turning the front Sub-command dial allows you to adjust flash
compensation.
Maybe the camera's light meter or flash is giving your images
a little less exposure than you'd like, so you fine-tune by
adding a little extra exposure with the Exposure compensation
or Flash compensation button. These buttons can be
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