Konica Minolta IV Instruction Manual page 67

This image is flat. The pixel distribution in
the histogram reflects the low-contrast
scene. The lack of any strong shadows or
dark tones is indicated by the absence of
pixels on the left of the histogram. Most of
the detail is concentrated in a narrow range
in the mid-tones.
By moving the shadow slider to
the right to set the black level to
where the pixel distribution
begins, image contrast is
improved.
The gamma slider can be used to change the relative distribution of the tones in the
image. By moving the gamma slider to the left toward the shadows, the image
becomes lighter. By moving the gamma slider in the opposite direction, the image
becomes darker. However, unlike the brightness control in the brightness, contrast,
and color-balance palette (p. 40), details are not lost in the shadows or highlights.
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