excuse my English
It was morning at 07:26:33 am, shutter speed 1/500, aperture f / 9, ISO 100 film speed, focal length 75mm lens EF 70-200mm f/4L USM.
I and a friend were walking on foot roadside, I noticed the low-lying fog, but the sun was not in a good position, I waited waiting for the sun rise up over the mountains and to my surprise came the ray of sunshine that filtered between the trees, waiting a few more minutes went rays to illuminate the fog.
I worked at editing the raw file in photoshop just by increasing the contrast and colors of blacks, then passing to the software I have corrected the shadows and lights, so I increased the contrast still it shall increase gradually to avoid losing detail, with the brush burns I darkened the river fog and lighten the brush I passed all the rays of the sun for intravederli; are about three hours