Apple Aperture 3.5 - Manual (Page 270)

Chapter 7 Make image adjustments 270
Correct exposure, highlight detail, shadow detail, and brightness
You use the Exposure adjustment controls to set the exposure, recovery (highlight detail), black
point (shadow detail), and brightness values.
You can quickly adjust the exposure of a RAW image using the Auto Exposure button. You can
also correct an image’s exposure manually by adjusting the Exposure parameter. The amount of
latitude you have—the visually acceptable range of f-stops—depends on the file type, the bit
depth, and the amount of compression applied to the image during capture. Typically, a RAW file
is capable of a slightly wider latitude than a JPEG file.
Before Exposure adjustment After Exposure adjustment
You can adjust the Brightness parameter when you want to lighten or darken your image. When
you adjust brightness, the brightness values of the midtone pixels in the image change the most.
You can change the brightness of the image temporarily to see how the adjustment affects
details in the shadows, midtones, and highlights. For more precise control over the range of
tonality in the image, consider using the Levels adjustment controls. For more information, see
Adjust the levels of an image on page 295.
Before Brightness adjustment After Brightness adjustment
You can also recover highlight and shadow details in an image by adjusting the Recovery and
Black Point parameters.
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