Select On to reduce barrel distortion when shooting with wide- angle lenses and to reduce pin-cushion distortion when shooting with long lenses (note that the edges of the area visible in the viewfinder may be cropped out of the final photograph, and that the time needed to process photographs before recording begins may increase). This option is recommended only with type G and D lenses (PC, fisheye, and certain other lenses excluded); results are not guaranteed with other lenses.
ARetouch: Distortion Control
For information on creating copies of existing photographs with reduced barrel and pincushion distortion, see page 261.
Long Exp. NR (Long Exposure Noise Reduction) Gbutton ➜ Cshooting menu
If On is selected, photographs taken at shutter speeds slower than 8 s will be processed to reduce noise (randomly-spaced bright pixels or fog), increasing the time required to record images by roughly 1.5 to 2 times. During processing, “l m” will blink in the shutter speed/aperture displays and pictures can not be taken (if the camera is turned off before processing is complete, the picture will be saved but noise reduction will not be performed). In continuous release mode, frame rates will slow and while photographs are being processed, the capacity of the memory buffer will drop.
Photographs taken at high ISO sensitivities can be processed to reduce “noise.”
SHigh Reduce noise (randomly-spaced bright pixels, lines, or fog), particularly in T Normal photographs taken at high ISO sensitivities. Choose the amount of noise
U Low reduction performed from High, Normal, and Low.
Noise reduction is only performed at ISO sensitivities of ISO 1600 and higher.
Off The amount of noise reduction is less than the amount performed when Low
is selected for High ISO NR.