Images shot in low light

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lIn the Layers palette, duplicate the original image layer by dragging the background layer onto the "Create a new layer" icon, or use Ctrl/Cmd-J

2 Using either the pulldown blending mode menu in the Layers palette or the shortcut Alt/Opt-Shift-L, change the duplicate layer's blending mode to Color and rename it "Color."

3 Zoom in to ioo% using View > Actual Pixels or Ctrl/Cmd-Alt/ Option-Zero and move around the screen to an area where the digital noise is clearly visible

4 Apply some Gaussian Blur using Filter > Blur > Gaussian Blur Use a very small amount-just enough for the noise to disappear

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There are many ways to reduce digital noise or color aliasing—the red, green, and blue pixels that often show up in low-light photographs. If the digital picture is in a Raw file format, you can use Adobe Camera Raw or your Raw converter to minimize the noise. Alternatively, you can try one of the many Photoshop plug-ins or image-editing techniques, often involving use of the Lab image mode, to help. Here, however, is a quick method that utilizes blending modes.

The camera was hand-held in exceptionally low light to get this shot in a nineteenth-century fortress; I had to push the ISO sensitivity up to 6400 to avoid camera shake

Original image.

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