86Taking Photographs—ExposureMeteringThe metering method determines how the camera sets exposure:Exposure Controlling How the Camera Sets Exposureb6—Center Weight ( 194)This option controls the size of the area assigned the greatest weight in center-weighted metering.Camera meters circle 3 mm (0.12˝) in diameter (approximately 2% offrame). Circle is centered on current focus area (in group dynamic AF, oncenter focus area of current group; 78), making it possible to meteroff-center subjects (if non-CPU lens is used or if dynamic-area AF withclosest subject priority is in effect, camera will meter center focus area).En sures that sub ject will be correctly exposed, even when background ismuch brighter or darker. *SpotCamera meters entire frame but assigns greatest weight to area in centerof frame (defaults to area shown by 8-mm reference circle in viewfinder).Classic meter for portraits; recommended when using filters with an ex-posure factor (filter factor) over 1 × ( 249). *Center-weightedDescriptionMethod1,005-pixel RGB sensor sets exposure based on variety of informationfrom all areas of frame. With type G or D lens, camera uses 3D colormatrix metering II for natural results even when frame is dominated bybright (white or yellow) or dark (black or dark green) colors. With otherCPU lenses, 3D range information is not included; instead, camera usescolor matrix metering II. Color matrix metering is available when focallength and maximum aperture of non-CPU lens are specified using Non-CPU lens data item in shooting menu ( 131; center-weighted meteringis used if focal length or aperture is not specified). Matrix metering willnot produce desired results with autoexposure lock ( 97) or exposurecompensation ( 99), but is recommended in most other situations.3D colormatrix II/Colormatrix II/Colormatrix* For improved precision with non-CPU lenses, specify lens focal length and maximumaperture in Non-CPU lens data menu ( 131).Before shooting, press the metering selector lockbutton and rotate the metering selector to choosea meth od suit ed to the com posi tion and lightingconditions, and confirm your se lection in theviewfinder.
