Use this option to fine-tune the exposure value selected by the camera. Exposure can be fine-tuned separately for each metering method by from +1 to −1 EV in steps of 1/6 EV.
Fine-Tuning Exposure
The exposure compensation (E) icon is not displayed when exposure fine-tuning is in effect. The only way to determine how much exposure has been altered is to view the amount in the fine-tuning menu.