315UWhen calculating exposure, center-weightedmetering assigns the greatest weight to acircle in the center of the frame. The diameter(φ ) of this circle can be set to 8, 12, 15, or20 mm or to the average of the entire frame.Note that unless Average is selected, the diameter is fixed at12 mm when a non-CPU lens is used, regardless of the settingselected for Non-CPU lens data in the setup menu (0 228). WhenAverage is selected, the average of the entire frame will be used forboth CPU and non-CPU lenses.Use this option to fine-tune the exposurevalue selected by the camera. Exposure canbe fine-tuned separately for each meteringmethod by from +1 to –1 EV in steps of 1/ 6 EV.b5: Center-Weighted Area G button ➜ A Custom Settings menub6: Fine-Tune Optimal Exposure G button ➜ A Custom Settings menuD Fine-Tuning ExposureExposure can be fine-tuned separately for each Custom Settings bankand is not affected by two-button resets. Note that as the exposurecompensation (E) icon is not displayed, the only way to determine howmuch exposure has been altered is to view the amount in the fine-tuning menu. Exposure compensation (0 137) is preferred in mostsituations.
