Apple Aperture 2 - Manual (Page 412)

412 Part III Performing Image Adjustments
Working with the Exposure Controls
You use the Exposure adjustment controls to set the exposure, recovery, black point,
and brightness values.
Correcting Exposure in the Image
If you’ve over- or underexposed an image, you can correct it by adjusting the
Exposure parameter. The amount of latitude you have—the visually acceptable range
of f-stops—depends on the file type and the bit depth of the image. Typically, a RAW
file is capable of a slightly wider latitude than a JPEG file.
Note: The amount of latitude depends on the camera, bit depth, file format, and
amount of compression applied during capture. For optimum results, you should shoot
your images within 1.5 stops of a balanced exposure.
Before Exposure adjustment After Exposure adjustment