Nikon D3000 D3000 User's Manual - Page 140

Noise Reduction G button ➜ C shooting menu If On is selected, photographs taken at shutter speeds slower than 8 s or at ISO sensitivities over ISO 400 will be processed to reduce noise. The time required for processing is roughly equal to the current shutter speed; during processing, "l m" will blink in the viewfinder and photographs can not be taken. In continuous release mode, frame rates will slow and the capacity of the memory buffer will drop. Noise reduction will not be performed if the camera is turned off before processing is complete. If Off is selected, noise reduction will only be performed at ISO sensitivities over ISO 800; the amount of noise reduction is less than that performed when On is selected, and does not apply to noise caused by slow shutter speeds. AF-Assist G button ➜ C shooting menu If On is selected and lighting is poor, the built-in AF-assist illuminator (0 43) will light to assist the focus operation in single-servo AF (AF-S selected for focus mode, or single-servo AF selected in AF-A focus mode) when e Auto-area is selected for AF-area mode or when c Single point, d Dynamic area, or f 3D-tracking (11 points) is selected and the center focus point is used. If Off is selected, the AF-assist illuminator will not light to assist the focus operation. The camera may not be able to focus using autofocus when lighting is poor. AF-assist illuminator A See Also See page 161 for restrictions on the lenses that can be used with AF assist. See page 176 for i the shooting modes in which the AF-assist illuminator can be used. 122