I had mentioned "defoging" sometime a week or so ago and decided to expand on it a bit after a few questions. So today here are two pictures..the first is SOC strait out of the camera.

The second is defogged in Photoshop (I have PSE5). Go to Enhance > unsharp mask and set the amount to 25; the radius to 50 and threshold to 0.

Its a suttle difference, but enough to just crisp up the whole picture.