I was on a hill 6 miles west of Bronson, Iowa, looking west. The sun has been turning red at sunset caused by the smoke from the west coast fires. The picture shows the point when it was the most red. When it lowered to about the top of the trees on the right, it gradually faded and disappeared.

Taken with Nikon D7100
Focal length 116mm/35mm focal length: 174
ISO 100
f/8
1/80 sec.
max. aperture 4.9
metering Center Weighted

Cropped to 1920 x 1467 pixels
Slight sharpening
File size 162 KB (original size is 19.3 MB)