Nikon D3s Body Only D3S User's Manual - Page 317

Long Exp. NR (Long Exposure Noise Reduction) G button ➜ C shooting menu If On is selected, photographs taken at shutter speeds slower than 1 s will be processed to reduce noise (randomly-spaced bright pixels or fog). The time required for SHOOT CUSTOM processing is roughly equal to the current shutter speed; 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. High ISO NR G button ➜ C shooting menu Photographs taken at high ISO sensitivities can be processed to reduce noise. Option S High T Normal U Low Off Description Noise reduction is performed at ISO sensitivities over ISO 3200. While photographs are being processed, the capacity of the memory buffer will drop. Choose the amount of noise reduction performed from High, Normal, and Low. Noise reduction is only performed at sensitivities of Hi 0.3 and higher. The amount of noise reduction is less than the amount performed when Low is selected for High ISO NR. High ISO NR has no effect on movies. U 291