Nikon D3s Body Only D3S User's Manual - Page 142

Metering Metering determines how the camera sets exposure. The following options are available: Method Description a Recommended in most situations. Camera meters a wide 3D color matrix II area of the frame and sets exposure according to distribution of brightness, color, distance, and composition for natural results. Camera meters entire frame but assigns greatest weight to 12-mm Z circle in center of viewfinder (if CPU Center- lens is attached, area can be selected weighted using Custom Setting b5, Center- weighted area, 0 304 1). Classic meter for portraits. 2 Center-weighted area 3 Camera meters circle 4 mm (0.16 in.) in diameter (approximately 1.5% of frame). Circle is centered on current Z focus point, making it possible to b meter off-center subjects (if non-CPU Spot lens is used or if auto-area AF is in effect (0 92), camera will meter center focus point). Ensures that Spot metering area 3 subject will be correctly exposed, even when background is much brighter or darker. 2 1 When non-CPU lens is attached, average for entire frame will be used if Average is selected for Custom Setting b5; otherwise, center-weighted metering for non-CPU lenses will use 12-mm circle in center of viewfinder, regardless of setting selected for Non-CPU lens data. 2 For improved precision with non-CPU lenses, specify lens focal length and maximum aperture in Non-CPU lens data menu (0 215). 3 Metered area is not actually displayed in viewfinder. 116