ON THE UNION PACIFIC RAILROAD NEAR THOMPSON SPRINGS, UTAH, MARCH 19, 2015
Sigma 18-250 f3.5-6.3 at 18mm
1/3200 sec. f4
This shot from the rear window of the last car of an eastbound California Zephyr was made with the lens nearly wide open in order to diffuse the dust and schmutz on the window glass. I also used a rubber lens hood to block out light reflected from behind.