Rainbow Fragment and Anticrepuscular Rays

April 18, 2014

Crepuscular rays and rainbow

Photographer: Thalia Traianou
Summary Authors: Thalia Traianou; Jim Foster

The photo above showing a fragment of a rainbow and set of anticrepuscular rays was captured at sunset from the campus of the Aristotle University of Thesaloniki, Greece. If the complete primary rainbow were observed these anticrepuscular rays would appear to fan out from the center of the bow -- a rainbow wheel. In this case, though the camera is still at the anitisolar point, the rays look parallel since only the ones near the horizon are visible. Note that this view is toward the eastern horizon, but the rays actually extend all away across the sky to the western horizon.

Photo details: Camera Model: Canon EOS 500D; Lens: EF-S18-55mm f/3.5-5.6 IS; Focal Length: 55mm; Focus Distance: Infinite; Aperture: f/6.3; Exposure Time: 0.013 s (1/80); ISO equiv: 100; Software: Adobe Photoshop Lightroom 3.4.