Nikon D3000 User Manual

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Exposure
Metering
Choose how the camera sets exposure in PSA, and M modes (in other modes, the 
camera selects the metering method automatically).
1
Place the cursor in the information display.
If shooting information is not displayed in the monitor, press the 
R button. 
Press the 
P button to place the cursor in the information display.
2
Display metering options.
Highlight the current metering method in the 
information display and press 
J.
3
Choose a metering method.
Highlight one of the following options and press 
J.
R button
Information display
P button
Method
Description
Matrix
Produces natural results in most situations. Camera uses 420-pixel RGB 
sensor to meter a wide area of the frame and set exposure according to 
tone distribution, color, composition, and, with type G or D lenses 
(
0 158), range information (3D color matrix metering II; with other CPU 
lenses, camera uses color matrix metering II, which does not include 3D 
range information).
M
Center-
weighted
Camera meters entire frame but assigns greatest weight to center area. 
Classic meter for portraits; recommended when using filters with an 
exposure factor (filter factor) over 1×.
Spot
Camera meters current focus point; use to meter off-center subjects (if 
Auto-area is selected for AF-area mode as described on page 44, 
camera will meter center focus point). Ensures that subject will be 
correctly exposed, even when background is much brighter or darker.