Earth Rainbow

July 15, 2020


Photographer: Nik Szymanek
Summary Author: Nik Szymanek 

The image above features what I call an Earth Rainbow, an artificial rainbow created during the spring season, in this case, when local farmers here in southeastern England are irrigating onion fields. Patience is required as the viewing geometry has to be correct. On this afternoon the spraying nozzle was in an accessible part of the field and the Sun at a suitable altitude to create a reasonably high bow in the spray. The nozzle sweeps from side to side and a gravity-operated chopping blade breaks up the flow to help spread the water across the field. This means that the visible rainbow changes on a continuous basis, especially as wind gusts also break up the flow. Occasionally, the water drops become quite large, creating a vibrant, colorful arc with a hint of supernumerary bands along the primary rainbow’s inner edge. Photo taken on May 30, 2020.

Photo Details: Camera Canon EOS 5D Mark II; Software Adobe Photoshop 21.0 (Windows); Exposure Time 0.0010s (1/1000); Aperture ƒ/7.1; ISO equivalent 400; Lens 28-135mm; Focal Length 95.0mm.