255Long exposure NR (defaults to Off)On Reduce “noise” (bright spots or fog) inphotos taken at slow shutter speeds.OffHigh ISO NR (defaults to Normal)High Reduce “noise” (randomly-spacedbright pixels) in photos taken at highISO sensitivities.NormalLowOffVignette control (defaults to Normal)High Reduce the drop in brightness at theedges of photographs when using typeG, E, and D lenses (PC lenses excluded).The effect is most noticeable atmaximum aperture.NormalLowOffAuto distortion control (defaults to Off)On Reduce barrel distortion when shootingwith wide-angle lenses and to reducepin-cushion distortion when shootingwith long lenses.OffFlicker reductionFlicker reduction setting This option takes effect duringviewfinder photography. Select Enablefor Flicker reduction setting to adjustshot timing to reduce the effects offlicker under fluorescent or mercuryvapor lighting. The Flicker reductionindicator item controls whether aFLICKER icon is displayed in theviewfinder when flicker is detected.Flicker reduction indicator