Fine Tune Optimal Exposure; Custom Setting B6 (D300S And D) - Nikon D300 User Manual

My Recommendation: When I use the Center-weighted area
meter, I generally use the 13 mm setting to make the largest
area of the center of the Viewfinder be the most sensitive
section. Personally, I use 3D Matrix metering most of the
time and have my camera's Fn (FUNC.) button set up to
switch to the Spot meter temporarily. That way, I am using
Nikon's incredible 3D Color Matrix system, with its ability to
consider brightness, color, distance, and composition. Matrix
gives me the best metering I've had with any camera yet! The
Center-weighted area meter is still included in our modern
cameras to make people who are used to using the older style
meter more comfortable. Most of us will use Matrix metering
these days.

Fine Tune Optimal Exposure

Custom setting b6 (D300S and D300)
(User's Manual – D300S page 272; D300 page 277)
Nikon has taken the stance that most major camera systems
should allow the user to fine-tune them. The exposure system
is no exception. Fine tune optimal exposure allows you to
fine-tune the Matrix, Center-weighted area, and Spot
metering systems by + 1/-1 EV in 1/6 EV steps.
In other words, you can force each of the three metering
systems to add or deduct a little exposure from what it
normally would use to expose your subject. This stays in
effect with no further notice until you set it back to zero. It is
indeed fine-tuning, since the maximum 1 EV step up or down
is divided into 6 parts (1/6 EV). If you feel that your camera
is too conservative with the highlights, mildly underexposing,
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