Nikon D3X - Manual (Page 342)

316
U
b5: Center-Weighted Area
Note that unless [Average] is selected, the diameter is fixed at
12 mm when a non-CPU lens is used, regardless of the setting
selected for [Non-CPU lens data] in the setup menu (pg. 218).
When [Average] is selected, the average of the entire frame will be
used for both CPU and non-CPU lenses.
b6: Fine Tune Optimal Exposure
Use this option to fine-tune the exposure value selected by the
camera. Exposure can be fine tuned separately for each metering
method by from +1 to –1 EV in steps of
1 /
6
EV.
1
Select Custom Setting b6.
Highlight Custom Setting b6
([Fine tune optimal exposure])
and press
2.
2
Select [Yes].
The message shown at right
will be displayed; highlight
[Yes] and press
2 to proceed,
or select [No] to exit without
altering exposure.
When calculating exposure, center-
weighted metering assigns the greatest
weight to a circle in the center of the frame.
The diameter (
φ) of this circle can be set to
8, 12, 15, or 20 mm or to the average of the
entire frame.
Option
L φ 8 mm
M φ 12 mm (default)
N φ 15 mm
O φ 20 mm
P Average