Mount Diablo hiding in Fog

This set of photos is using the same scene as I did for Day 2, Day 9 and Day 16. However, this time the mountain is not visible because of the fog in the foothills. Looking at the earlier photos, comparing the trees in the middle of the photos allows the comparison to easily see the narrower Field of View (FoV) the 90mm (145mm FF) lens provides.

All photos were taken with my Sony SLT α77 and Tamron SP AF 90mm F/2.8 Marco 1:1 lens, using Aperture mode, with a setting of f/8, White Balance set to cloudy, ISO to 400 and 3-shot bracketing with +/- 0.5 EV. No post-process adjustments were made to the photos.