Nikon F100 Instruction Manual - Page 23

WWW.LENSINC.NET Exposure Metering System • Three choices of the metering system are available to suit the lighting for your subject. Rotate the metering system selector while pressing the metering system lock release to select desired metering system. • Certain metering systems cannot be used with some lenses (page 33). • Metering systems and characteristics of each are as follows: q: Matrix Metering/3D Matrix Metering w: Center-Weighted Metering Center-Weighted Metering places special emphasis on brightness within the 12mm-diameter circle in the viewfinder, so it is useful for basing exposure on a specific area of the scene. e: Spot Metering Exposure Matrix Metering provides correct exposure control using a 10-segment Matrix Sensor. With D- or G-type Nikkor lenses, 10-segment 3D Matrix Metering automatically activates, applying scene brightness, scene contrast and subject distance information to ensure even more accurate exposure control. Center-Weighted or Spot Metering is recommended for the Auto Exposure Lock function (page 54) or exposure compensation (page 56). 44 Nearly 100% of the meter's sensitivity is concentrated on the 4mm-dia. area (approx. 1% of entire frame) within the selected focus area of the viewfinder. Use Spot Metering when you want to base the exposure on a very small area within the frame, such as with a backlit subject or lowcontrast scenes. When Spot Metering is selected, shifting focus area also shifts Spot Metering area to a corresponding position. However, Spot Metering area stays at center (does not shift) as long as Dynamic AF Mode with Closest Subject Priority (page 39) is activated or non-CPU lens (page 32) is attached. 45