Crepuscular Rays Over Arquata Scrivia, Italy

August 11, 2015

Crepuscular rays

Photographer: Daniele Cipollina
Summary Author: Daniele Cipollina; Jim Foster

Shown above is a magnificent set of crepuscular rays as observed from Arquata Scrivia, Italy, on the evening of July 25, 2015. Looking at the looming cloud near the western horizon the source of the rays is quite evident. When large clouds (often cumulonimbus clouds) having lobed edges are positioned near the horizon at sunrise or sunset, sunlight streams through in places but is blocked elsewhere, resulting in fingers of darkness and lanes of light -- crepuscular rays. Perspective gives the appearance that the rays converge where the Sun is setting. In fact, they're parallel.

Photo details: Nikon D7100 camera; ISO 800; Nikkor 17/55 ED; stopped at f:6.5; 4 pictures each with different exposure (1/15, 1/25, 1/40 and 1/60 sec. exposures); processed in final HDR image.