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Chapter 3. Using Camera Raw > Luminance Smoothing

Luminance Smoothing

The Luminance Smoothing slider lets you control grayscale noise that makes the image appear grainy—it's typically a problem when shooting at high ISO speeds. The default setting is zero, which provides no smoothing; but many cameras benefit from a modest amount—say 5 or so—of luminance smoothing even at slow speeds, so you may want to experiment to find a good default for your camera. At very high settings, the Luminance smoothing slider produces images that look like they've been hit with the Median filter, so always check the entire image at 100% view or above before committing to a setting.


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