Nikon D7100, User Manual

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236
U
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 6, 8, 10, or 13 mm or to
the average of the entire frame.
Note that the diameter is fixed at 8 mm when a non-CPU lens is used, regardless of
the setting selected for
Non-CPU lens data
in the setup menu (
0
149). When
Average
is selected, the average of the entire frame will be used for CPU lenses.
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.
If
On
is selected, exposure will lock when the shutter-release
button is pressed halfway.
b4: Center-Weighted Area
G
button ➜
A
Custom Settings menu
b5: Fine-tune Optimal Exposure
G
button ➜
A
Custom Settings menu
D Fine-Tuning Exposure
Exposure fine-tuning is not affected by two-button resets. Note that as the exposure
compensation (
E ) icon is not displayed, the only way to determine how much exposure has
been altered is to view the amount in the fine-tuning menu. Exposure compensation ( 0 86)
is preferred in most situations.
c: Timers/AE Lock
c1: Shutter-Release Button AE-L
G
button ➜
A
Custom Settings menu