"Randy or Sherry Guttery" wrote in message
...

Photoshop has provisions to not only work in areas - but to handle
shadow, midtone and highlight areas separately; lightening / darkening /
increasing and decreasing saturation - and you can select to apply
either to the entire image or specific areas. Add that to the ability to
handle layers each with such capability - and you can do some pretty
neat stuff.

Note that, for this to work optimally, the camera needs to be on a tripod,
with the focus and aperture the same for all shots.