Nikon D300 D300 User's Manual - Page 127

To choose a metering method, rotate the metering selector until the desired mode is displayed. Metering selector Z A 3D Color Matrix II Metering In matrix metering, exposure is set using a 1,005-segment RGB sensor. Use a type G or D lens for results that include range information (3D color matrix metering II; see page 352 for information on lens types). With other CPU lenses, 3D range information is not included (color matrix metering II). Color matrix metering is available when focal length and maximum aperture of non-CPU lens are specified using [Non-CPU lens data] item in setup menu (see page 197; center-weighted metering is used if focal length or aperture is not specified). A See Also For information on choosing the size of the area assigned the greatest weight in center-weighted metering, see Custom Setting b5 ([Centerweighted area], pg. 277). For information on making separate adjustments to optimal exposure for each metering method, see Custom Setting b6 ([Fine tune optimal exposure], pg. 277). 101