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845
Technical Notes
Exposure
Metering
system
•
Viewfinder photography: TTL exposure metering
using RGB sensor with approximately 180K (180,000)
pixels
•
Live view: TTL exposure metering performed by
image sensor
Metering
mode
•
Matrix: 3D color matrix metering III (type G, E, and D
lenses); color matrix metering III (other CPU lenses);
color matrix metering available with non-CPU lenses if
user provides lens data
•
Center-weighted: Weight of 75% given to 12 mm
circle in center of frame; diameter of circle can be
changed to 8, 15, or 20 mm, or weighting can be
based on average of entire frame (non-CPU and AF-S
Fisheye NIKKOR 8–15mm f/3.5–4.5E ED lenses use
12-mm circle)
•
Spot: Meters circle approximately 4 mm in diameter
(about 1.5% of frame) centered on selected focus
point (on center focus point when non-CPU or AF-S
Fisheye NIKKOR 8–15mm f/3.5–4.5E ED lens is used)
•
Highlight-weighted: Available with type G, E, and D
lenses
Range
*
•
Matrix and center-weighted metering: −3 – +20 EV
•
Spot metering: 2 – 20 EV
•
Highlight-weighted metering: 0 – 20 EV
* Figures are for ISO 100 and f/1.4 lens at 20 °C/68 °F
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