Flat Rainbow Over Paris

August 27, 2013

Flat Rainbow Over Paris

Photographer: Bertrand Kulik; Bertrand’s Web site
Summary Authors: Bertrand Kulik; Jim Foster

The strip of color just above the skyline of Paris was snapped from the window of my home in the late morning on March 17, 2013. Though there’s no real bow to this colorful band and only two colors are clearly seen this is indeed a rainbow. In order to see a rainbow the Sun can’t be any more than 43 degrees above the horizon. It was just below this geometric light limit when I took the picture. Of course, even then a rainbow wouldn’t have been observed unless I was positioned exactly between the distant rain shower and the Sun, located behind the camera. As the Sun inched higher in the sky, the flat-lying rainbow suddenly vanished.

Photo details: Camera Model: Canon EOS 7D; Focal Length: 70.0mm; Aperture: f/9.9; Exposure Time: 0.0025 s (1/395); ISO equiv: 100; 3 picture montage; Adobe Photoshop CS4 Windows.